chore: Release v3.5.2

ci: Add end-to-end deployment pipeline and fix docs auto-trigger (#112 )
chore: Release v3.5.1
2026-05-16 05:27:53 +00:00 · 2026-04-27 15:04:20 +00:00 · 2026-04-27 23:59:09 +09:00 · 2026-04-27 11:53:21 +00:00 · 2026-04-27 20:51:50 +09:00 · 2026-04-25 15:17:54 +00:00
43 changed files with 1613 additions and 109 deletions
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,4 +1,4 @@
-name: Build
+name: CI

 on:
  push:
@@ -37,6 +37,8 @@ jobs:
            python-version: "3.10"
          - os: ubuntu-latest
            python-version: "3.11"
+          - os: ubuntu-latest
+            python-version: "3.12"
          - os: ubuntu-latest
            python-version: "3.13"
          - os: ubuntu-latest
@@ -59,7 +61,7 @@ jobs:
      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
-          python -m pip install .[dev]
+          python -m pip install ".[cpu,dev]"

      - name: Check ONNX Runtime providers
        run: |
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -1,9 +1,8 @@
-name: Deploy docs
+name: Deploy Documentation

 on:
-  push:
-    tags:
-      - "v*.*.*"
+  release:
+    types: [released]
  workflow_dispatch:

 permissions:
@@ -15,7 +14,7 @@ jobs:
    steps:
      - uses: actions/checkout@v4
        with:
-          fetch-depth: 0  # Fetch full history for git-committers and git-revision-date plugins
+          fetch-depth: 0

      - uses: actions/setup-python@v5
        with:
--- a/.github/workflows/pipeline.yml
+++ b/.github/workflows/pipeline.yml
@@ -0,0 +1,221 @@
+name: Release Pipeline
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version (e.g. 3.6.0, 3.6.0b1, 3.6.0rc1)'
+        required: true
+
+concurrency:
+  group: pipeline
+  cancel-in-progress: false
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    outputs:
+      is_prerelease: ${{ steps.prerelease.outputs.is_prerelease }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Validate version (PEP 440)
+        run: |
+          python - <<'EOF'
+          import re, sys
+          v = "${{ inputs.version }}"
+          if not re.fullmatch(r'\d+\.\d+\.\d+((a|b|rc)\d+|\.dev\d+)?', v):
+              print(f"Invalid version: {v}")
+              print("Expected forms: 3.6.0, 3.6.0a1, 3.6.0b1, 3.6.0rc1, 3.6.0.dev1")
+              sys.exit(1)
+          EOF
+
+      - name: Check tag does not exist
+        run: |
+          if git rev-parse "v${{ inputs.version }}" >/dev/null 2>&1; then
+            echo "Tag v${{ inputs.version }} already exists."
+            exit 1
+          fi
+
+      - name: Detect pre-release
+        id: prerelease
+        run: |
+          if [[ "${{ inputs.version }}" =~ (a|b|rc|\.dev)[0-9]+ ]]; then
+            echo "is_prerelease=true" >> $GITHUB_OUTPUT
+          else
+            echo "is_prerelease=false" >> $GITHUB_OUTPUT
+          fi
+
+  test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    needs: validate
+
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: 'pip'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install ".[cpu,dev]"
+
+      - name: Run tests
+        run: pytest -v --tb=short
+
+  release:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    needs: test
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.RELEASE_TOKEN }}
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Update pyproject.toml
+        run: |
+          python - <<'EOF'
+          import re, pathlib
+          p = pathlib.Path('pyproject.toml')
+          text = p.read_text()
+          new = re.sub(r'^version\s*=\s*".*"', f'version = "${{ inputs.version }}"', text, count=1, flags=re.M)
+          if new == text:
+              raise SystemExit("Failed to update version in pyproject.toml")
+          p.write_text(new)
+          EOF
+
+      - name: Update uniface/__init__.py
+        run: |
+          python - <<'EOF'
+          import re, pathlib
+          p = pathlib.Path('uniface/__init__.py')
+          text = p.read_text()
+          new = re.sub(r"^__version__\s*=\s*'.*'", f"__version__ = '${{ inputs.version }}'", text, count=1, flags=re.M)
+          if new == text:
+              raise SystemExit("Failed to update __version__ in uniface/__init__.py")
+          p.write_text(new)
+          EOF
+
+      - name: Commit, tag, push
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add pyproject.toml uniface/__init__.py
+          git commit -m "chore: Release v${{ inputs.version }}"
+          git tag "v${{ inputs.version }}"
+          git push origin HEAD:${{ github.ref_name }}
+          git push origin "v${{ inputs.version }}"
+
+  publish:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    needs: [validate, release]
+    permissions:
+      contents: write
+      id-token: write
+    environment:
+      name: pypi
+      url: https://pypi.org/project/uniface/
+
+    steps:
+      - name: Checkout tag
+        uses: actions/checkout@v4
+        with:
+          ref: v${{ inputs.version }}
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+          cache: 'pip'
+
+      - name: Install build tools
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install build twine
+
+      - name: Build package
+        run: python -m build
+
+      - name: Check package
+        run: twine check dist/*
+
+      - name: Publish to PyPI
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.PYPI_API_TOKEN }}
+        run: twine upload dist/*
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v1
+        with:
+          tag_name: v${{ inputs.version }}
+          files: dist/*
+          generate_release_notes: true
+          prerelease: ${{ needs.validate.outputs.is_prerelease }}
+
+  docs:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    needs: [validate, publish]
+    if: needs.validate.outputs.is_prerelease == 'false'
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout tag
+        uses: actions/checkout@v4
+        with:
+          ref: v${{ inputs.version }}
+          fetch-depth: 0
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install mkdocs-material pymdown-extensions mkdocs-git-committers-plugin-2 mkdocs-git-revision-date-localized-plugin
+
+      - name: Build docs
+        env:
+          MKDOCS_GIT_COMMITTERS_APIKEY: ${{ secrets.MKDOCS_GIT_COMMITTERS_APIKEY }}
+        run: mkdocs build --strict
+
+      - name: Deploy to GitHub Pages
+        uses: peaceiris/actions-gh-pages@v4
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./site
+          destination_dir: docs
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -3,7 +3,7 @@ name: Publish to PyPI
 on:
  push:
    tags:
-      - "v*.*.*"  # Trigger only on version tags like v0.1.9
+      - "v*.*.*"

 concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
@@ -54,7 +54,7 @@ jobs:
    strategy:
      fail-fast: false
      matrix:
-        python-version: ["3.10", "3.11", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]

    steps:
      - name: Checkout code
@@ -69,7 +69,7 @@ jobs:
      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
-          python -m pip install .[dev]
+          python -m pip install ".[cpu,dev]"

      - name: Run tests
        run: pytest -v
@@ -112,8 +112,19 @@ jobs:
          TWINE_PASSWORD: ${{ secrets.PYPI_API_TOKEN }}
        run: twine upload dist/*

+      - name: Detect pre-release
+        id: prerelease
+        run: |
+          if [[ "${{ needs.validate.outputs.version }}" =~ (a|b|rc|\.dev)[0-9]+ ]]; then
+            echo "is_prerelease=true" >> $GITHUB_OUTPUT
+          else
+            echo "is_prerelease=false" >> $GITHUB_OUTPUT
+          fi
+
      - name: Create GitHub Release
        uses: softprops/action-gh-release@v1
        with:
+          token: ${{ secrets.RELEASE_TOKEN }}
          files: dist/*
          generate_release_notes: true
+          prerelease: ${{ steps.prerelease.outputs.is_prerelease }}
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -0,0 +1,84 @@
+name: Release
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version (e.g. 3.6.0, 3.6.0b1, 3.6.0rc1)'
+        required: true
+
+concurrency:
+  group: release
+  cancel-in-progress: false
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.RELEASE_TOKEN }}
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Validate version (PEP 440)
+        run: |
+          python - <<'EOF'
+          import re, sys
+          v = "${{ inputs.version }}"
+          # PEP 440 subset: X.Y.Z, optional aN / bN / rcN / .devN
+          if not re.fullmatch(r'\d+\.\d+\.\d+((a|b|rc)\d+|\.dev\d+)?', v):
+              print(f"Invalid version: {v}")
+              print("Expected forms: 3.6.0, 3.6.0a1, 3.6.0b1, 3.6.0rc1, 3.6.0.dev1")
+              sys.exit(1)
+          EOF
+
+      - name: Check tag does not exist
+        run: |
+          if git rev-parse "v${{ inputs.version }}" >/dev/null 2>&1; then
+            echo "Tag v${{ inputs.version }} already exists."
+            exit 1
+          fi
+
+      - name: Update pyproject.toml
+        run: |
+          python - <<'EOF'
+          import re, pathlib
+          p = pathlib.Path('pyproject.toml')
+          text = p.read_text()
+          new = re.sub(r'^version\s*=\s*".*"', f'version = "${{ inputs.version }}"', text, count=1, flags=re.M)
+          if new == text:
+              raise SystemExit("Failed to update version in pyproject.toml")
+          p.write_text(new)
+          EOF
+
+      - name: Update uniface/__init__.py
+        run: |
+          python - <<'EOF'
+          import re, pathlib
+          p = pathlib.Path('uniface/__init__.py')
+          text = p.read_text()
+          new = re.sub(r"^__version__\s*=\s*'.*'", f"__version__ = '${{ inputs.version }}'", text, count=1, flags=re.M)
+          if new == text:
+              raise SystemExit("Failed to update __version__ in uniface/__init__.py")
+          p.write_text(new)
+          EOF
+
+      - name: Commit, tag, push
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add pyproject.toml uniface/__init__.py
+          git commit -m "chore: Release v${{ inputs.version }}"
+          git tag "v${{ inputs.version }}"
+          git push origin HEAD:${{ github.ref_name }}
+          git push origin "v${{ inputs.version }}"
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -59,12 +59,12 @@ This project uses [Ruff](https://docs.astral.sh/ruff/) for linting and formattin
 #### General Rules

 - **Line length:** 120 characters maximum
- **Python version:** 3.11+ (use modern syntax)
+- **Python version:** 3.10+ (use modern syntax)
 - **Quote style:** Single quotes for strings, double quotes for docstrings

 #### Type Hints

-Use modern Python 3.11+ type hints (PEP 585 and PEP 604):
+Use modern Python 3.10+ type hints (PEP 585 and PEP 604):

 ```python
 # Preferred (modern)
@@ -188,6 +188,49 @@ Example notebooks demonstrating library usage:
 | Face Vector Store  | [10_face_vector_store.ipynb](examples/10_face_vector_store.ipynb)   |
 | Head Pose Estimation | [11_head_pose_estimation.ipynb](examples/11_head_pose_estimation.ipynb) |

+## Release Process
+
+Releases are fully automated via GitHub Actions. Only maintainers with branch-protection bypass privileges on `main` can trigger a release.
+
+### Cutting a release
+
+1. Go to **Actions → Release → Run workflow** on GitHub.
+2. Enter the version following [PEP 440](https://peps.python.org/pep-0440/):
+   - Stable: `0.7.0`, `1.0.0`
+   - Pre-release: `0.7.0rc1`, `0.7.0b1`, `0.7.0a1`, `0.7.0.dev1`
+3. Click **Run workflow**.
+
+### What happens automatically
+
+The `Release` workflow:
+
+1. Validates the version string.
+2. Updates `pyproject.toml` and `uniface/__init__.py`.
+3. Commits `chore: Release vX.Y.Z` to `main`.
+4. Creates and pushes tag `vX.Y.Z`.
+
+Pushing the tag then triggers:
+
+- **Publish to PyPI** — builds the package, runs tests on Python 3.10–3.14, uploads to PyPI, and creates a GitHub Release (flagged as pre-release for `a`/`b`/`rc`/`.dev` versions).
+- **Deploy docs** — fires only after a **stable** GitHub Release is published. Pre-releases do not update the live documentation site.
+
+### Verifying a release
+
+- PyPI: <https://pypi.org/project/uniface/>
+- GitHub Releases: <https://github.com/yakhyo/uniface/releases>
+- Docs (stable only): <https://yakhyo.github.io/uniface/>
+
+### Installing a pre-release
+
+End users can opt in to pre-releases with the `--pre` flag:
+
+```bash
+pip install uniface --pre                # latest pre-release
+pip install uniface==0.7.0rc1            # specific pre-release
+```
+
+Without `--pre`, `pip install uniface` always resolves to the latest stable version.
+
 ## Questions?

 Open an issue or start a discussion on GitHub.
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-<h1 align="center">UniFace: All-in-One Face Analysis Library</h1>
+<h1 align="center">UniFace: A Unified Face Analysis Library for Python</h1>

 <div align="center">

@@ -14,12 +14,12 @@
 </div>

 <div align="center">
-    <img src="https://raw.githubusercontent.com/yakhyo/uniface/main/.github/logos/uniface_rounded_q80.webp" width="90%" alt="UniFace - All-in-One Open-Source Face Analysis Library">
+    <img src="https://raw.githubusercontent.com/yakhyo/uniface/main/.github/logos/uniface_rounded_q80.webp" width="90%" alt="UniFace - A Unified Face Analysis Library for Python">
 </div>

 ---

-**UniFace** is a lightweight, production-ready face analysis library built on ONNX Runtime. It provides high-performance face detection, recognition, landmark detection, face parsing, gaze estimation, and attribute analysis with hardware acceleration support across platforms.
+**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.

 ---

@@ -30,6 +30,7 @@
 - **Face Tracking** — Multi-object tracking with [BYTETracker](https://github.com/yakhyo/bytetrack-tracker) for persistent IDs across video frames
 - **Facial Landmarks** — 106-point landmark localization module (separate from 5-point detector landmarks)
 - **Face Parsing** — BiSeNet semantic segmentation (19 classes), XSeg face masking
+- **Portrait Matting** — Trimap-free alpha matte with MODNet (background removal, green screen, compositing)
 - **Gaze Estimation** — Real-time gaze direction with MobileGaze
 - **Head Pose Estimation** — 3D head orientation (pitch, yaw, roll) with 6D rotation representation
 - **Attribute Analysis** — Age, gender, race (FairFace), and emotion
@@ -63,6 +64,9 @@
  <tr>
    <td align="center" colspan="2"><b>Face Segmentation</b><br><img src="https://raw.githubusercontent.com/yakhyo/uniface/main/assets/demos/segmentation.jpg" width="80%"></td>
  </tr>
+  <tr>
+    <td align="center" colspan="2"><b>Portrait Matting</b><br><img src="https://raw.githubusercontent.com/yakhyo/uniface/main/assets/demos/matting.jpg" width="100%"></td>
+  </tr>
  <tr>
    <td align="center" colspan="2"><b>Face Anonymization</b><br><img src="https://raw.githubusercontent.com/yakhyo/uniface/main/assets/demos/anonymization.jpg" width="100%"></td>
  </tr>
@@ -72,23 +76,25 @@

 ## Installation

-**Standard installation**
+**CPU / Apple Silicon**

 ```bash
-pip install uniface
+pip install uniface[cpu]
 ```

-**GPU support (CUDA)**
+**GPU support (NVIDIA CUDA)**

 ```bash
 pip install uniface[gpu]
 ```

+> **Why separate extras?** `onnxruntime` and `onnxruntime-gpu` conflict when both are installed — they own the same Python namespace. Installing only the extra you need prevents that conflict entirely.
+
 **From source (latest version)**

 ```bash
 git clone https://github.com/yakhyo/uniface.git
-cd uniface && pip install -e .
+cd uniface && pip install -e ".[cpu]"   # or .[gpu] for CUDA
 ```

 **FAISS vector store**
@@ -186,6 +192,32 @@ for face in faces:

 ---

+## Example (Portrait Matting)
+
+```python
+import cv2
+import numpy as np
+from uniface.matting import MODNet
+
+matting = MODNet()
+
+image = cv2.imread("portrait.jpg")
+matte = matting.predict(image)  # (H, W) float32 in [0, 1]
+
+# Transparent PNG
+rgba = cv2.cvtColor(image, cv2.COLOR_BGR2BGRA)
+rgba[:, :, 3] = (matte * 255).astype(np.uint8)
+cv2.imwrite("transparent.png", rgba)
+
+# Green screen
+matte_3ch = matte[:, :, np.newaxis]
+bg = np.full_like(image, (0, 177, 64), dtype=np.uint8)
+result = (image * matte_3ch + bg * (1 - matte_3ch)).astype(np.uint8)
+cv2.imwrite("green_screen.jpg", result)
+```
+
+---
+
 ## Jupyter Notebooks

 | Example | Colab | Description |
@@ -194,7 +226,7 @@ for face in faces:
 | [02_face_alignment.ipynb](examples/02_face_alignment.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/02_face_alignment.ipynb) | Face alignment for recognition |
 | [03_face_verification.ipynb](examples/03_face_verification.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/03_face_verification.ipynb) | Compare faces for identity |
 | [04_face_search.ipynb](examples/04_face_search.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/04_face_search.ipynb) | Find a person in group photos |
-| [05_face_analyzer.ipynb](examples/05_face_analyzer.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/05_face_analyzer.ipynb) | All-in-one analysis |
+| [05_face_analyzer.ipynb](examples/05_face_analyzer.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/05_face_analyzer.ipynb) | Unified face analysis |
 | [06_face_parsing.ipynb](examples/06_face_parsing.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/06_face_parsing.ipynb) | Semantic face segmentation |
 | [07_face_anonymization.ipynb](examples/07_face_anonymization.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/07_face_anonymization.ipynb) | Privacy-preserving blur |
 | [08_gaze_estimation.ipynb](examples/08_gaze_estimation.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/08_gaze_estimation.ipynb) | Gaze direction estimation |
@@ -202,6 +234,7 @@ for face in faces:
 | [10_face_vector_store.ipynb](examples/10_face_vector_store.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/10_face_vector_store.ipynb) | FAISS-backed face database |
 | [11_head_pose_estimation.ipynb](examples/11_head_pose_estimation.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/11_head_pose_estimation.ipynb) | Head pose estimation (pitch, yaw, roll) |
 | [12_face_recognition.ipynb](examples/12_face_recognition.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/12_face_recognition.ipynb) | Standalone face recognition pipeline |
+| [13_portrait_matting.ipynb](examples/13_portrait_matting.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/13_portrait_matting.ipynb) | Portrait matting with MODNet |

 ---

@@ -279,6 +312,7 @@ If you plan commercial use, verify model license compatibility.
 | Parsing | [face-segmentation](https://github.com/yakhyo/face-segmentation) | - | XSeg Face Segmentation |
 | Gaze | [gaze-estimation](https://github.com/yakhyo/gaze-estimation) | ✓ | MobileGaze Training |
 | Head Pose | [head-pose-estimation](https://github.com/yakhyo/head-pose-estimation) | ✓ | Head Pose Training (6DRepNet-style) |
+| Matting | [modnet](https://github.com/yakhyo/modnet) | - | MODNet Portrait Matting |
 | Anti-Spoofing | [face-anti-spoofing](https://github.com/yakhyo/face-anti-spoofing) | - | MiniFASNet Inference |
 | Attributes | [fairface-onnx](https://github.com/yakhyo/fairface-onnx) | - | FairFace ONNX Inference |

@@ -302,3 +336,6 @@ Questions or feedback:
 ## License

 This project is licensed under the [MIT License](LICENSE).
+
+> **Disclaimer:** This project is not affiliated with or related to
+> [Uniface](https://uniface.com/) by Rocket Software.
--- a/assets/demos/matting.jpg
+++ b/assets/demos/matting.jpg
--- a/docs/concepts/execution-providers.md
+++ b/docs/concepts/execution-providers.md
@@ -93,7 +93,7 @@ print("Available providers:", providers)
 No additional setup required. ARM64 optimizations are built into `onnxruntime`:

 ```bash
-pip install uniface
+pip install uniface[cpu]
 ```

 Verify ARM64:
@@ -110,7 +110,7 @@ python -c "import platform; print(platform.machine())"

 ### NVIDIA GPU (CUDA)

-Install with GPU support:
+Install with GPU support (this installs `onnxruntime-gpu`, which already includes CPU fallback):

 ```bash
 pip install uniface[gpu]
@@ -140,7 +140,7 @@ else:
 CPU execution is always available:

 ```bash
-pip install uniface
+pip install uniface[cpu]
 ```

 Works on all platforms without additional configuration.
@@ -215,7 +215,7 @@ for image_path in image_paths:

 3. Reinstall with GPU support:
   ```bash
-   pip uninstall onnxruntime onnxruntime-gpu
+   pip uninstall onnxruntime onnxruntime-gpu -y
   pip install uniface[gpu]
   ```

--- a/docs/concepts/overview.md
+++ b/docs/concepts/overview.md
@@ -26,6 +26,7 @@ graph TB
        HPOSE[Head Pose]
        PARSE[Parsing]
        SPOOF[Anti-Spoofing]
+        MATT[Matting]
        PRIV[Privacy]
    end

@@ -42,6 +43,7 @@ graph TB
    end

    IMG --> DET
+    IMG --> MATT
    DET --> REC
    DET --> LMK
    DET --> ATTR
@@ -62,16 +64,14 @@ graph TB

 ## Design Principles

-### 1. ONNX-First
+### 1. Cross-Platform Inference

-UniFace runs inference primarily via ONNX Runtime for core components:
+UniFace uses portable model runtimes to provide consistent inference across macOS, Linux, and Windows. Most core components run through ONNX Runtime, while optional components may use PyTorch where appropriate.

 - **Cross-platform**: Same models work on macOS, Linux, Windows
 - **Hardware acceleration**: Automatic selection of optimal provider
 - **Production-ready**: No Python-only dependencies for inference

-Some optional components (e.g., emotion TorchScript, torchvision NMS) require PyTorch.
-
 ### 2. Minimal Dependencies

 Core dependencies are kept minimal:
@@ -120,6 +120,7 @@ uniface/
 ├── landmark/       # 106-point landmarks
 ├── attribute/      # Age, gender, emotion, race
 ├── parsing/        # Face semantic segmentation
+├── matting/        # Portrait matting (MODNet)
 ├── gaze/           # Gaze estimation
 ├── headpose/       # Head pose estimation
 ├── spoofing/       # Anti-spoofing
--- a/docs/contributing.md
+++ b/docs/contributing.md
@@ -99,6 +99,14 @@ docs: Update installation instructions

 ---

+## Releases
+
+Releases are automated via GitHub Actions. Maintainers trigger **Actions → Release → Run workflow** with a [PEP 440](https://peps.python.org/pep-0440/) version (e.g. `0.7.0`, `0.7.0rc1`). The workflow bumps `pyproject.toml` + `uniface/__init__.py`, tags the commit, and publishes to PyPI. Docs redeploy only for stable releases.
+
+See [CONTRIBUTING.md](https://github.com/yakhyo/uniface/blob/main/CONTRIBUTING.md#release-process) for the full process.
+
+---
+
 ## Questions?

 Open an issue on [GitHub](https://github.com/yakhyo/uniface/issues).
--- a/docs/index.md
+++ b/docs/index.md
@@ -10,7 +10,7 @@ template: home.html

 # UniFace { .hero-title }

-<p class="hero-subtitle">All-in-One Open-Source Face Analysis Library</p>
+<p class="hero-subtitle">A Unified Face Analysis Library for Python</p>

 [![PyPI Version](https://img.shields.io/pypi/v/uniface.svg?label=Version)](https://pypi.org/project/uniface/)
 [![Python Version](https://img.shields.io/badge/Python-3.10%2B-blue)](https://www.python.org/)
@@ -20,7 +20,7 @@ template: home.html
 [![Kaggle Badge](https://img.shields.io/badge/Notebooks-Kaggle?label=Kaggle&color=blue)](https://www.kaggle.com/yakhyokhuja/code)
 [![Discord](https://img.shields.io/badge/Discord-Join%20Server-5865F2?logo=discord&logoColor=white)](https://discord.gg/wdzrjr7R5j)

-<!-- <img src="https://raw.githubusercontent.com/yakhyo/uniface/main/.github/logos/uniface_rounded_q80.webp" alt="UniFace - All-in-One Open-Source Face Analysis Library" style="max-width: 70%; margin: 1rem 0;"> -->
+<!-- <img src="https://raw.githubusercontent.com/yakhyo/uniface/main/.github/logos/uniface_rounded_q80.webp" alt="UniFace - A Unified Face Analysis Library for Python" style="max-width: 70%; margin: 1rem 0;"> -->

 [Get Started](quickstart.md){ .md-button .md-button--primary }
 [View on GitHub](https://github.com/yakhyo/uniface){ .md-button }
@@ -31,7 +31,7 @@ template: home.html

 <div class="feature-card" markdown>
 ### :material-face-recognition: Face Detection
-ONNX-optimized detectors (RetinaFace, SCRFD, YOLO) with 5-point landmarks.
+RetinaFace, SCRFD, and YOLO detectors with 5-point landmarks.
 </div>

 <div class="feature-card" markdown>
@@ -90,14 +90,14 @@ FAISS-backed embedding store for fast multi-identity face search.

 ## Installation

-UniFace runs inference primarily via **ONNX Runtime**; some optional components (e.g., emotion TorchScript, torchvision NMS) require **PyTorch**.
+UniFace uses portable model runtimes for consistent inference across macOS, Linux, and Windows. Most core components run through **ONNX Runtime**, while optional components may use **PyTorch** where appropriate.

-**Standard**
+**CPU / Apple Silicon**
 ```bash
-pip install uniface
+pip install uniface[cpu]
 ```

-**GPU (CUDA)**
+**GPU (NVIDIA CUDA)**
 ```bash
 pip install uniface[gpu]
 ```
@@ -106,7 +106,7 @@ pip install uniface[gpu]
 ```bash
 git clone https://github.com/yakhyo/uniface.git
 cd uniface
-pip install -e .
+pip install -e ".[cpu]"   # or .[gpu] for CUDA
 ```

 ---
--- a/docs/installation.md
+++ b/docs/installation.md
@@ -11,15 +11,27 @@ This guide covers all installation options for UniFace.

 ---

+## Why Two Extras?
+
+`onnxruntime` (CPU) and `onnxruntime-gpu` (CUDA) both own the same Python namespace.
+Installing both at the same time causes file conflicts and silent provider mismatches.
+UniFace exposes them as separate, mutually exclusive extras so you install exactly one.
+
+---
+
 ## Quick Install

-The simplest way to install UniFace:
+=== "CPU / Apple Silicon"

-```bash
-pip install uniface
-```
+    ```bash
+    pip install uniface[cpu]
+    ```

-This installs the CPU version with all core dependencies.
+=== "NVIDIA GPU (CUDA)"
+
+    ```bash
+    pip install uniface[gpu]
+    ```

 ---

@@ -27,14 +39,16 @@ This installs the CPU version with all core dependencies.

 ### macOS (Apple Silicon - M1/M2/M3/M4)

-For Apple Silicon Macs, the standard installation automatically includes ARM64 optimizations:
+The `[cpu]` extra pulls in the standard `onnxruntime` package, which has native ARM64 support
+built in since version 1.13. No additional setup is needed for CoreML acceleration.

 ```bash
-pip install uniface
+pip install uniface[cpu]
 ```

 !!! tip "Native Performance"
-    The base `onnxruntime` package has native Apple Silicon support with ARM64 optimizations built-in since version 1.13+. No additional configuration needed.
+    `onnxruntime` 1.13+ includes ARM64 optimizations out of the box.
+    UniFace automatically detects and enables `CoreMLExecutionProvider` on Apple Silicon.

 Verify ARM64 installation:

@@ -47,18 +61,22 @@ python -c "import platform; print(platform.machine())"

 ### Linux/Windows with NVIDIA GPU

-For CUDA acceleration on NVIDIA GPUs:
-
 ```bash
 pip install uniface[gpu]
 ```

+This installs `onnxruntime-gpu`, which includes both `CUDAExecutionProvider` and
+`CPUExecutionProvider` — no separate CPU package is needed.
+
 **Requirements:**

- `uniface[gpu]` automatically installs `onnxruntime-gpu`. Requirements depend on the ORT version and execution provider.
+- NVIDIA driver compatible with your CUDA version
+- CUDA 11.x or 12.x toolkit
+- cuDNN 8.x

 !!! info "CUDA Compatibility"
-    See the [ONNX Runtime GPU compatibility matrix](https://onnxruntime.ai/docs/execution-providers/CUDA-ExecutionProvider.html) for matching CUDA and cuDNN versions.
+    See the [ONNX Runtime GPU compatibility matrix](https://onnxruntime.ai/docs/execution-providers/CUDA-ExecutionProvider.html)
+    for matching CUDA and cuDNN versions.

 Verify GPU installation:

@@ -70,23 +88,10 @@ print("Available providers:", ort.get_available_providers())

 ---

-### FAISS Vector Store
-
-For fast multi-identity face search using a FAISS vector store:
-
-```bash
-pip install faiss-cpu   # CPU
-pip install faiss-gpu   # NVIDIA GPU (CUDA)
-```
-
-See the [Stores module](modules/stores.md) for usage.
-
---
-
 ### CPU-Only (All Platforms)

 ```bash
-pip install uniface
+pip install uniface[cpu]
 ```

 Works on all platforms with automatic CPU fallback.
@@ -100,37 +105,58 @@ For development or the latest features:
 ```bash
 git clone https://github.com/yakhyo/uniface.git
 cd uniface
-pip install -e .
+
+pip install -e ".[cpu]"   # CPU / Apple Silicon
+pip install -e ".[gpu]"   # NVIDIA GPU
 ```

 With development dependencies:

 ```bash
-pip install -e ".[dev]"
+pip install -e ".[cpu,dev]"
 ```

 ---

+## FAISS Vector Store
+
+For fast multi-identity face search using a FAISS vector store:
+
+```bash
+pip install faiss-cpu   # CPU
+pip install faiss-gpu   # NVIDIA GPU (CUDA)
+```
+
+See the [Stores module](modules/stores.md) for usage.
+
+---
+
 ## Dependencies

-UniFace has minimal dependencies:
+UniFace has minimal core dependencies:

 | Package | Purpose |
 |---------|---------|
 | `numpy` | Array operations |
 | `opencv-python` | Image processing |
-| `onnxruntime` | Model inference |
 | `scikit-image` | Geometric transforms |
+| `scipy` | Signal processing |
 | `requests` | Model download |
 | `tqdm` | Progress bars |

-**Optional:**
+**Runtime extras (install exactly one):**

-| Package | Install extra | Purpose |
-|---------|---------------|---------|
+| Extra | Package | Use case |
+|-------|---------|---------|
+| `uniface[cpu]` | `onnxruntime` | CPU inference, Apple Silicon |
+| `uniface[gpu]` | `onnxruntime-gpu` | NVIDIA CUDA inference |
+
+**Other optional packages:**
+
+| Package | Install | Purpose |
+|---------|---------|---------|
 | `faiss-cpu` / `faiss-gpu` | `pip install faiss-cpu` | FAISS vector store |
-| `onnxruntime-gpu` | `uniface[gpu]` | CUDA acceleration |
-| `torch` | `pip install torch` | Emotion model uses TorchScript |
+| `torch` | `pip install torch` | Emotion model (TorchScript) |
 | `torchvision` | `pip install torchvision` | Faster NMS for YOLO detectors |

 ---
@@ -155,17 +181,81 @@ print("Installation successful!")

 ---

+## Upgrading
+
+When upgrading UniFace, stay consistent with your runtime extra:
+
+```bash
+pip install --upgrade uniface[cpu]   # or uniface[gpu]
+```
+
+If you are switching from CPU to GPU (or vice versa):
+
+```bash
+pip uninstall onnxruntime onnxruntime-gpu -y
+pip install uniface[gpu]   # install the one you want
+```
+
+---
+
+## Pre-release Versions
+
+UniFace ships release candidates and betas to PyPI ahead of stable releases (versions like `0.7.0rc1`, `0.7.0b1`, `0.7.0a1`). These let you try upcoming features before they're finalized.
+
+`pip install uniface` always installs the latest **stable** release. To opt in to pre-releases:
+
+```bash
+# Latest pre-release (if newer than latest stable)
+pip install uniface[cpu] --pre
+
+# A specific pre-release
+pip install uniface[cpu]==0.7.0rc1
+```
+
+Pre-releases are not recommended for production — APIs may still change before the stable release.
+
+---
+
 ## Troubleshooting

+### onnxruntime Not Found
+
+If you see:
+
+```
+ImportError: onnxruntime is not installed. Install it with one of:
+  pip install uniface[cpu]   # CPU / Apple Silicon
+  pip install uniface[gpu]   # NVIDIA GPU (CUDA)
+```
+
+You installed uniface without an extra. Run the appropriate command above.
+
+---
+
+### Both onnxruntime and onnxruntime-gpu Installed
+
+If you previously ran `pip install uniface[gpu]` on top of a `pip install uniface[cpu]`
+(or vice versa), you may have both packages installed simultaneously, which causes conflicts.
+Fix it with:
+
+```bash
+pip uninstall onnxruntime onnxruntime-gpu -y
+pip install uniface[gpu]   # or uniface[cpu]
+```
+
+---
+
 ### Import Errors

-If you encounter import errors, ensure you're using Python 3.10+:
+Ensure you're using Python 3.10+:

 ```bash
 python --version
 # Should show: Python 3.10.x or higher
 ```

+---
+
 ### Model Download Issues

 Models are automatically downloaded on first use. If downloads fail:
@@ -179,6 +269,25 @@ model_path = verify_model_weights(RetinaFaceWeights.MNET_V2)
 print(f"Model downloaded to: {model_path}")
 ```

+---
+
+### CUDA Not Detected
+
+1. Verify CUDA installation:
+   ```bash
+   nvidia-smi
+   ```
+
+2. Check CUDA version compatibility with ONNX Runtime.
+
+3. Reinstall the GPU extra cleanly:
+   ```bash
+   pip uninstall onnxruntime onnxruntime-gpu -y
+   pip install uniface[gpu]
+   ```
+
+---
+
 ### Performance Issues on Mac

 Verify you're using the ARM64 build (not x86_64 via Rosetta):
--- a/docs/license-attribution.md
+++ b/docs/license-attribution.md
@@ -20,5 +20,6 @@ UniFace is released under the [MIT License](https://opensource.org/licenses/MIT)
 | SphereFace | [yakhyo/face-recognition](https://github.com/yakhyo/face-recognition) | MIT |
 | BiSeNet | [yakhyo/face-parsing](https://github.com/yakhyo/face-parsing) | MIT |
 | MobileGaze | [yakhyo/gaze-estimation](https://github.com/yakhyo/gaze-estimation) | MIT |
+| MODNet | [yakhyo/modnet](https://github.com/yakhyo/modnet) | Apache-2.0 |
 | MiniFASNet | [yakhyo/face-anti-spoofing](https://github.com/yakhyo/face-anti-spoofing) | Apache-2.0 |
 | FairFace | [yakhyo/fairface-onnx](https://github.com/yakhyo/fairface-onnx) | CC BY 4.0 |
--- a/docs/models.md
+++ b/docs/models.md
@@ -371,6 +371,36 @@ XSeg from DeepFaceLab outputs masks for face regions. Requires 5-point landmarks

 ---

+## Portrait Matting Models
+
+### MODNet
+
+MODNet (Real-Time Trimap-Free Portrait Matting) produces soft alpha mattes from full images without requiring a trimap. Uses MobileNetV2 backbone with low-resolution, high-resolution, and fusion branches.
+
+| Model Name | Variant | Size | Use Case |
+| ---------- | ------- | ---- | -------- |
+| `PHOTOGRAPHIC` :material-check-circle: | High-quality | 25 MB | Portrait photos |
+| `WEBCAM` | Real-time | 25 MB | Webcam feeds |
+
+!!! info "Model Details"
+    **Paper**: [MODNet: Real-Time Trimap-Free Portrait Matting via Objective Decomposition](https://arxiv.org/abs/2011.11961) (AAAI 2022)
+
+    **Source**: [yakhyo/modnet](https://github.com/yakhyo/modnet) — ported weights and clean inference codebase
+
+    **Output**: Alpha matte `(H, W)` in `[0, 1]`
+
+**Applications:**
+
+- Background removal / replacement
+- Green screen compositing
+- Video conferencing virtual backgrounds
+- Portrait editing
+
+!!! note "Input Requirements"
+    Operates on full images (not face crops). No trimap or face detection required.
+
+---
+
 ## Anti-Spoofing Models

 ### MiniFASNet Family
@@ -420,6 +450,7 @@ See [Model Cache & Offline Use](concepts/model-cache-offline.md) for full detail
 - **Head Pose Estimation**: [yakhyo/head-pose-estimation](https://github.com/yakhyo/head-pose-estimation) - 6D rotation head pose estimation training and ONNX models
 - **Face Parsing Training**: [yakhyo/face-parsing](https://github.com/yakhyo/face-parsing) - BiSeNet training code and pretrained weights
 - **Face Segmentation**: [yakhyo/face-segmentation](https://github.com/yakhyo/face-segmentation) - XSeg ONNX Inference
+- **Portrait Matting**: [yakhyo/modnet](https://github.com/yakhyo/modnet) - MODNet ported weights and inference (from [ZHKKKe/MODNet](https://github.com/ZHKKKe/MODNet))
 - **Face Anti-Spoofing**: [yakhyo/face-anti-spoofing](https://github.com/yakhyo/face-anti-spoofing) - MiniFASNet ONNX inference (weights from [minivision-ai/Silent-Face-Anti-Spoofing](https://github.com/minivision-ai/Silent-Face-Anti-Spoofing))
 - **FairFace**: [yakhyo/fairface-onnx](https://github.com/yakhyo/fairface-onnx) - FairFace ONNX inference for race, gender, age prediction
 - **InsightFace**: [deepinsight/insightface](https://github.com/deepinsight/insightface) - Model architectures and pretrained weights
@@ -432,4 +463,5 @@ See [Model Cache & Offline Use](concepts/model-cache-offline.md) for full detail
 - **AdaFace**: [AdaFace: Quality Adaptive Margin for Face Recognition](https://arxiv.org/abs/2204.00964)
 - **ArcFace**: [Additive Angular Margin Loss for Deep Face Recognition](https://arxiv.org/abs/1801.07698)
 - **SphereFace**: [Deep Hypersphere Embedding for Face Recognition](https://arxiv.org/abs/1704.08063)
+- **MODNet**: [Real-Time Trimap-Free Portrait Matting via Objective Decomposition](https://arxiv.org/abs/2011.11961)
 - **BiSeNet**: [Bilateral Segmentation Network for Real-time Semantic Segmentation](https://arxiv.org/abs/1808.00897)
--- a/docs/modules/matting.md
+++ b/docs/modules/matting.md
@@ -0,0 +1,157 @@
+# Portrait Matting
+
+Portrait matting produces a soft alpha matte separating the foreground (person) from the background — no trimap needed.
+
+<figure markdown="span">
+  ![Portrait Matting](https://raw.githubusercontent.com/yakhyo/uniface/main/assets/demos/matting.jpg){ width="100%" }
+  <figcaption>MODNet: Input → Matte → Green Screen</figcaption>
+</figure>
+
+---
+
+## Available Models
+
+| Model | Variant | Size | Use Case |
+|-------|---------|------|----------|
+| **MODNet Photographic** :material-check-circle: | PHOTOGRAPHIC | 25 MB | High-quality portrait photos |
+| MODNet Webcam | WEBCAM | 25 MB | Real-time webcam feeds |
+
+---
+
+## Basic Usage
+
+```python
+import cv2
+from uniface.matting import MODNet
+
+matting = MODNet()
+
+image = cv2.imread("photo.jpg")
+matte = matting.predict(image)
+
+print(f"Matte shape: {matte.shape}")   # (H, W)
+print(f"Matte dtype: {matte.dtype}")   # float32
+print(f"Matte range: [{matte.min():.2f}, {matte.max():.2f}]")  # [0, 1]
+```
+
+---
+
+## Model Variants
+
+```python
+from uniface.matting import MODNet
+from uniface.constants import MODNetWeights
+
+# Photographic (default) — best for photos
+matting = MODNet()
+
+# Webcam — optimized for real-time
+matting = MODNet(model_name=MODNetWeights.WEBCAM)
+
+# Custom input size
+matting = MODNet(input_size=256)
+```
+
+| Parameter | Default | Description |
+|-----------|---------|-------------|
+| `model_name` | `PHOTOGRAPHIC` | Model variant to load |
+| `input_size` | `512` | Target shorter-side size for preprocessing |
+| `providers` | `None` | ONNX Runtime execution providers |
+
+---
+
+## Applications
+
+### Transparent Background (RGBA)
+
+```python
+import cv2
+import numpy as np
+
+matting = MODNet()
+image = cv2.imread("photo.jpg")
+matte = matting.predict(image)
+
+rgba = cv2.cvtColor(image, cv2.COLOR_BGR2BGRA)
+rgba[:, :, 3] = (matte * 255).astype(np.uint8)
+cv2.imwrite("transparent.png", rgba)
+```
+
+### Green Screen
+
+```python
+import numpy as np
+
+matte_3ch = matte[:, :, np.newaxis]
+bg = np.full_like(image, (0, 177, 64), dtype=np.uint8)
+green = (image * matte_3ch + bg * (1 - matte_3ch)).astype(np.uint8)
+cv2.imwrite("green_screen.jpg", green)
+```
+
+### Custom Background
+
+```python
+import cv2
+import numpy as np
+
+background = cv2.imread("beach.jpg")
+background = cv2.resize(background, (image.shape[1], image.shape[0]))
+
+matte_3ch = matte[:, :, np.newaxis]
+result = (image * matte_3ch + background * (1 - matte_3ch)).astype(np.uint8)
+cv2.imwrite("custom_bg.jpg", result)
+```
+
+### Webcam Matting
+
+```python
+import cv2
+import numpy as np
+from uniface.matting import MODNet
+
+matting = MODNet(model_name="modnet_webcam")
+cap = cv2.VideoCapture(0)
+
+while True:
+    ret, frame = cap.read()
+    if not ret:
+        break
+
+    matte = matting.predict(frame)
+    matte_3ch = matte[:, :, np.newaxis]
+    bg = np.full_like(frame, (0, 177, 64), dtype=np.uint8)
+    result = (frame * matte_3ch + bg * (1 - matte_3ch)).astype(np.uint8)
+
+    cv2.imshow("Matting", np.hstack([frame, result]))
+    if cv2.waitKey(1) & 0xFF == ord("q"):
+        break
+
+cap.release()
+cv2.destroyAllWindows()
+```
+
+---
+
+## Factory Function
+
+```python
+from uniface.matting import create_matting_model
+from uniface.constants import MODNetWeights
+
+# Default (Photographic)
+matting = create_matting_model()
+
+# With enum
+matting = create_matting_model(MODNetWeights.WEBCAM)
+
+# With string
+matting = create_matting_model("modnet_webcam")
+```
+
+---
+
+## Next Steps
+
+- [Parsing](parsing.md) - Face semantic segmentation
+- [Privacy](privacy.md) - Face anonymization
+- [Detection](detection.md) - Face detection
--- a/docs/notebooks.md
+++ b/docs/notebooks.md
@@ -12,7 +12,7 @@ Run UniFace examples directly in your browser with Google Colab, or download and
 | [Face Alignment](https://github.com/yakhyo/uniface/blob/main/examples/02_face_alignment.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/02_face_alignment.ipynb) | Align faces for recognition |
 | [Face Verification](https://github.com/yakhyo/uniface/blob/main/examples/03_face_verification.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/03_face_verification.ipynb) | Compare faces for identity |
 | [Face Search](https://github.com/yakhyo/uniface/blob/main/examples/04_face_search.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/04_face_search.ipynb) | Find a person in group photos |
-| [Face Analyzer](https://github.com/yakhyo/uniface/blob/main/examples/05_face_analyzer.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/05_face_analyzer.ipynb) | All-in-one face analysis |
+| [Face Analyzer](https://github.com/yakhyo/uniface/blob/main/examples/05_face_analyzer.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/05_face_analyzer.ipynb) | Unified face analysis |
 | [Face Parsing](https://github.com/yakhyo/uniface/blob/main/examples/06_face_parsing.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/06_face_parsing.ipynb) | Semantic face segmentation |
 | [Face Anonymization](https://github.com/yakhyo/uniface/blob/main/examples/07_face_anonymization.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/07_face_anonymization.ipynb) | Privacy-preserving blur |
 | [Gaze Estimation](https://github.com/yakhyo/uniface/blob/main/examples/08_gaze_estimation.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/08_gaze_estimation.ipynb) | Gaze direction estimation |
@@ -20,6 +20,7 @@ Run UniFace examples directly in your browser with Google Colab, or download and
 | [Face Vector Store](https://github.com/yakhyo/uniface/blob/main/examples/10_face_vector_store.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/10_face_vector_store.ipynb) | FAISS-backed face database |
 | [Head Pose Estimation](https://github.com/yakhyo/uniface/blob/main/examples/11_head_pose_estimation.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/11_head_pose_estimation.ipynb) | 3D head orientation estimation |
 | [Face Recognition](https://github.com/yakhyo/uniface/blob/main/examples/12_face_recognition.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/12_face_recognition.ipynb) | Standalone face recognition pipeline |
+| [Portrait Matting](https://github.com/yakhyo/uniface/blob/main/examples/13_portrait_matting.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/yakhyo/uniface/blob/main/examples/13_portrait_matting.ipynb) | Portrait matting with MODNet |

 ---

@@ -33,7 +34,7 @@ git clone https://github.com/yakhyo/uniface.git
 cd uniface

 # Install dependencies
-pip install uniface jupyter
+pip install "uniface[cpu]" jupyter   # or uniface[gpu] for CUDA

 # Launch Jupyter
 jupyter notebook examples/
--- a/docs/quickstart.md
+++ b/docs/quickstart.md
@@ -280,6 +280,34 @@ print(f"Detected {len(np.unique(mask))} facial components")

 ---

+## Portrait Matting
+
+Remove backgrounds without a trimap:
+
+```python
+import cv2
+import numpy as np
+from uniface.matting import MODNet
+
+matting = MODNet()
+
+image = cv2.imread("portrait.jpg")
+matte = matting.predict(image)  # (H, W) float32 in [0, 1]
+
+# Transparent PNG
+rgba = cv2.cvtColor(image, cv2.COLOR_BGR2BGRA)
+rgba[:, :, 3] = (matte * 255).astype(np.uint8)
+cv2.imwrite("transparent.png", rgba)
+
+# Green screen
+matte_3ch = matte[:, :, np.newaxis]
+bg = np.full_like(image, (0, 177, 64), dtype=np.uint8)
+result = (image * matte_3ch + bg * (1 - matte_3ch)).astype(np.uint8)
+cv2.imwrite("green_screen.jpg", result)
+```
+
+---
+
 ## Face Anonymization

 Blur faces for privacy protection:
--- a/examples/01_face_detection.ipynb
+++ b/examples/01_face_detection.ipynb
@@ -13,7 +13,7 @@
    "  <a style=\"margin-bottom:6px;\" href=\"https://github.com/yakhyo/uniface\"><img alt=\"GitHub Stars\" src=\"https://img.shields.io/github/stars/yakhyo/uniface.svg?style=social\"></a>\n",
    "</div>\n",
    "\n",
-    "**UniFace** is a lightweight, production-ready, all-in-one face analysis library built on ONNX Runtime.\n",
+    "**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.\n",
    "\n",
    "🔗 **GitHub**: [github.com/yakhyo/uniface](https://github.com/yakhyo/uniface) | 📚 **Docs**: [yakhyo.github.io/uniface](https://yakhyo.github.io/uniface)\n",
    "\n",
@@ -31,7 +31,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "%pip install -q uniface\n",
+    "%pip install -q \"uniface[cpu]\"\n",
    "\n",
    "# Clone repo for assets (Colab only)\n",
    "import os\n",
--- a/examples/02_face_alignment.ipynb
+++ b/examples/02_face_alignment.ipynb
@@ -17,7 +17,7 @@
    "  <a style=\"margin-bottom:6px;\" href=\"https://github.com/yakhyo/uniface\"><img alt=\"GitHub Stars\" src=\"https://img.shields.io/github/stars/yakhyo/uniface.svg?style=social\"></a>\n",
    "</div>\n",
    "\n",
-    "**UniFace** is a lightweight, production-ready, all-in-one face analysis library built on ONNX Runtime.\n",
+    "**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.\n",
    "\n",
    "🔗 **GitHub**: [github.com/yakhyo/uniface](https://github.com/yakhyo/uniface) | 📚 **Docs**: [yakhyo.github.io/uniface](https://yakhyo.github.io/uniface)\n",
    "\n",
@@ -34,7 +34,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "%pip install -q uniface\n",
+    "%pip install -q \"uniface[cpu]\"\n",
    "\n",
    "# Clone repo for assets (Colab only)\n",
    "import os\n",
--- a/examples/03_face_verification.ipynb
+++ b/examples/03_face_verification.ipynb
@@ -13,7 +13,7 @@
    "  <a style=\"margin-bottom:6px;\" href=\"https://github.com/yakhyo/uniface\"><img alt=\"GitHub Stars\" src=\"https://img.shields.io/github/stars/yakhyo/uniface.svg?style=social\"></a>\n",
    "</div>\n",
    "\n",
-    "**UniFace** is a lightweight, production-ready, all-in-one face analysis library built on ONNX Runtime.\n",
+    "**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.\n",
    "\n",
    "🔗 **GitHub**: [github.com/yakhyo/uniface](https://github.com/yakhyo/uniface) | 📚 **Docs**: [yakhyo.github.io/uniface](https://yakhyo.github.io/uniface)\n",
    "\n",
@@ -30,7 +30,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "%pip install -q uniface\n",
+    "%pip install -q \"uniface[cpu]\"\n",
    "\n",
    "# Clone repo for assets (Colab only)\n",
    "import os\n",
--- a/examples/04_face_search.ipynb
+++ b/examples/04_face_search.ipynb
@@ -13,7 +13,7 @@
    "  <a style=\"margin-bottom:6px;\" href=\"https://github.com/yakhyo/uniface\"><img alt=\"GitHub Stars\" src=\"https://img.shields.io/github/stars/yakhyo/uniface.svg?style=social\"></a>\n",
    "</div>\n",
    "\n",
-    "**UniFace** is a lightweight, production-ready, all-in-one face analysis library built on ONNX Runtime.\n",
+    "**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.\n",
    "\n",
    "🔗 **GitHub**: [github.com/yakhyo/uniface](https://github.com/yakhyo/uniface) | 📚 **Docs**: [yakhyo.github.io/uniface](https://yakhyo.github.io/uniface)\n",
    "\n",
@@ -28,7 +28,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "%pip install -q uniface\n",
+    "%pip install -q \"uniface[cpu]\"\n",
    "\n",
    "# Clone repo for assets (Colab only)\n",
    "import os\n",
--- a/examples/05_face_analyzer.ipynb
+++ b/examples/05_face_analyzer.ipynb
@@ -13,7 +13,7 @@
    "  <a style=\"margin-bottom:6px;\" href=\"https://github.com/yakhyo/uniface\"><img alt=\"GitHub Stars\" src=\"https://img.shields.io/github/stars/yakhyo/uniface.svg?style=social\"></a>\n",
    "</div>\n",
    "\n",
-    "**UniFace** is a lightweight, production-ready, all-in-one face analysis library built on ONNX Runtime.\n",
+    "**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.\n",
    "\n",
    "🔗 **GitHub**: [github.com/yakhyo/uniface](https://github.com/yakhyo/uniface) | 📚 **Docs**: [yakhyo.github.io/uniface](https://yakhyo.github.io/uniface)\n",
    "\n",
@@ -30,7 +30,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "%pip install -q uniface\n",
+    "%pip install -q \"uniface[cpu]\"\n",
    "\n",
    "# Clone repo for assets (Colab only)\n",
    "import os\n",
--- a/examples/06_face_parsing.ipynb
+++ b/examples/06_face_parsing.ipynb
@@ -13,7 +13,7 @@
    "  <a style=\"margin-bottom:6px;\" href=\"https://github.com/yakhyo/uniface\"><img alt=\"GitHub Stars\" src=\"https://img.shields.io/github/stars/yakhyo/uniface.svg?style=social\"></a>\n",
    "</div>\n",
    "\n",
-    "**UniFace** is a lightweight, production-ready, all-in-one face analysis library built on ONNX Runtime.\n",
+    "**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.\n",
    "\n",
    "🔗 **GitHub**: [github.com/yakhyo/uniface](https://github.com/yakhyo/uniface) | 📚 **Docs**: [yakhyo.github.io/uniface](https://yakhyo.github.io/uniface)\n",
    "\n",
@@ -32,7 +32,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "%pip install -q uniface\n",
+    "%pip install -q \"uniface[cpu]\"\n",
    "\n",
    "# Clone repo for assets (Colab only)\n",
    "import os\n",
--- a/examples/07_face_anonymization.ipynb
+++ b/examples/07_face_anonymization.ipynb
@@ -13,7 +13,7 @@
    "  <a style=\"margin-bottom:6px;\" href=\"https://github.com/yakhyo/uniface\"><img alt=\"GitHub Stars\" src=\"https://img.shields.io/github/stars/yakhyo/uniface.svg?style=social\"></a>\n",
    "</div>\n",
    "\n",
-    "**UniFace** is a lightweight, production-ready, all-in-one face analysis library built on ONNX Runtime.\n",
+    "**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.\n",
    "\n",
    "🔗 **GitHub**: [github.com/yakhyo/uniface](https://github.com/yakhyo/uniface) | 📚 **Docs**: [yakhyo.github.io/uniface](https://yakhyo.github.io/uniface)\n",
    "\n",
@@ -31,7 +31,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "%pip install -q uniface\n",
+    "%pip install -q \"uniface[cpu]\"\n",
    "\n",
    "# Clone repo for assets (Colab only)\n",
    "import os\n",
--- a/examples/08_gaze_estimation.ipynb
+++ b/examples/08_gaze_estimation.ipynb
@@ -13,7 +13,7 @@
    "  <a style=\"margin-bottom:6px;\" href=\"https://github.com/yakhyo/uniface\"><img alt=\"GitHub Stars\" src=\"https://img.shields.io/github/stars/yakhyo/uniface.svg?style=social\"></a>\n",
    "</div>\n",
    "\n",
-    "**UniFace** is a lightweight, production-ready, all-in-one face analysis library built on ONNX Runtime.\n",
+    "**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.\n",
    "\n",
    "🔗 **GitHub**: [github.com/yakhyo/uniface](https://github.com/yakhyo/uniface) | 📚 **Docs**: [yakhyo.github.io/uniface](https://yakhyo.github.io/uniface)\n",
    "\n",
@@ -30,7 +30,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "%pip install -q uniface\n",
+    "%pip install -q \"uniface[cpu]\"\n",
    "\n",
    "# Clone repo for assets (Colab only)\n",
    "import os\n",
--- a/examples/09_face_segmentation.ipynb
+++ b/examples/09_face_segmentation.ipynb
@@ -13,7 +13,7 @@
    "  <a style=\"margin-bottom:6px;\" href=\"https://github.com/yakhyo/uniface\"><img alt=\"GitHub Stars\" src=\"https://img.shields.io/github/stars/yakhyo/uniface.svg?style=social\"></a>\n",
    "</div>\n",
    "\n",
-    "**UniFace** is a lightweight, production-ready, all-in-one face analysis library built on ONNX Runtime.\n",
+    "**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.\n",
    "\n",
    "🔗 **GitHub**: [github.com/yakhyo/uniface](https://github.com/yakhyo/uniface) | 📚 **Docs**: [yakhyo.github.io/uniface](https://yakhyo.github.io/uniface)\n",
    "\n",
@@ -32,7 +32,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "%pip install -q uniface\n",
+    "%pip install -q \"uniface[cpu]\"\n",
    "\n",
    "# Clone repo for assets (Colab only)\n",
    "import os\n",
--- a/examples/10_face_vector_store.ipynb
+++ b/examples/10_face_vector_store.ipynb
@@ -13,7 +13,7 @@
    "  <a style=\"margin-bottom:6px;\" href=\"https://github.com/yakhyo/uniface\"><img alt=\"GitHub Stars\" src=\"https://img.shields.io/github/stars/yakhyo/uniface.svg?style=social\"></a>\n",
    "</div>\n",
    "\n",
-    "**UniFace** is a lightweight, production-ready, all-in-one face analysis library built on ONNX Runtime.\n",
+    "**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.\n",
    "\n",
    "🔗 **GitHub**: [github.com/yakhyo/uniface](https://github.com/yakhyo/uniface) | 📚 **Docs**: [yakhyo.github.io/uniface](https://yakhyo.github.io/uniface)\n",
    "\n",
@@ -33,7 +33,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "%pip install -q uniface faiss-cpu\n",
+    "%pip install -q \"uniface[cpu]\" faiss-cpu\n",
    "\n",
    "# Clone repo for assets (Colab only)\n",
    "import os\n",
--- a/examples/11_head_pose_estimation.ipynb
+++ b/examples/11_head_pose_estimation.ipynb
@@ -13,7 +13,7 @@
    "  <a style=\"margin-bottom:6px;\" href=\"https://github.com/yakhyo/uniface\"><img alt=\"GitHub Stars\" src=\"https://img.shields.io/github/stars/yakhyo/uniface.svg?style=social\"></a>\n",
    "</div>\n",
    "\n",
-    "**UniFace** is a lightweight, production-ready, all-in-one face analysis library built on ONNX Runtime.\n",
+    "**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.\n",
    "\n",
    "🔗 **GitHub**: [github.com/yakhyo/uniface](https://github.com/yakhyo/uniface) | 📚 **Docs**: [yakhyo.github.io/uniface](https://yakhyo.github.io/uniface)\n",
    "\n",
@@ -30,7 +30,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "%pip install -q uniface\n",
+    "%pip install -q \"uniface[cpu]\"\n",
    "\n",
    "# Clone repo for assets (Colab only)\n",
    "import os\n",
--- a/examples/12_face_recognition.ipynb
+++ b/examples/12_face_recognition.ipynb
@@ -14,7 +14,7 @@
    "  <a style=\"margin-bottom:6px;\" href=\"https://github.com/yakhyo/uniface\"><img alt=\"GitHub Stars\" src=\"https://img.shields.io/github/stars/yakhyo/uniface.svg?style=social\"></a>\n",
    "</div>\n",
    "\n",
-    "**UniFace** is a lightweight, production-ready, all-in-one face analysis library built on ONNX Runtime.\n",
+    "**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.\n",
    "\n",
    "🔗 **GitHub**: [github.com/yakhyo/uniface](https://github.com/yakhyo/uniface) | 📚 **Docs**: [yakhyo.github.io/uniface](https://yakhyo.github.io/uniface)\n",
    "\n",
@@ -44,7 +44,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "%pip install -q uniface\n",
+    "%pip install -q \"uniface[cpu]\"\n",
    "\n",
    "# Clone repo for assets (Colab only)\n",
    "import os\n",
--- a/examples/13_portrait_matting.ipynb
+++ b/examples/13_portrait_matting.ipynb
@@ -0,0 +1,265 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Portrait Matting with MODNet\n",
+    "\n",
+    "<div style=\"display:flex; flex-wrap:wrap; align-items:center;\">\n",
+    "  <a style=\"margin-right:10px; margin-bottom:6px;\" href=\"https://pepy.tech/projects/uniface\"><img alt=\"PyPI Downloads\" src=\"https://static.pepy.tech/personalized-badge/uniface?period=total&units=international_system&left_color=grey&right_color=blue&left_text=Downloads\"></a>\n",
+    "  <a style=\"margin-right:10px; margin-bottom:6px;\" href=\"https://pypi.org/project/uniface/\"><img alt=\"PyPI Version\" src=\"https://img.shields.io/pypi/v/uniface.svg\"></a>\n",
+    "  <a style=\"margin-right:10px; margin-bottom:6px;\" href=\"https://opensource.org/licenses/MIT\"><img alt=\"License\" src=\"https://img.shields.io/badge/License-MIT-blue.svg\"></a>\n",
+    "  <a style=\"margin-bottom:6px;\" href=\"https://github.com/yakhyo/uniface\"><img alt=\"GitHub Stars\" src=\"https://img.shields.io/github/stars/yakhyo/uniface.svg?style=social\"></a>\n",
+    "</div>\n",
+    "\n",
+    "**UniFace** is a lightweight, production-ready Python library for face detection, recognition, tracking, landmark analysis, face parsing, gaze estimation, and face attributes.\n",
+    "\n",
+    "🔗 **GitHub**: [github.com/yakhyo/uniface](https://github.com/yakhyo/uniface) | 📚 **Docs**: [yakhyo.github.io/uniface](https://yakhyo.github.io/uniface)\n",
+    "\n",
+    "---\n",
+    "\n",
+    "This notebook demonstrates portrait matting using **MODNet** — a trimap-free model that produces soft alpha mattes from full images. No face detection or cropping required.\n",
+    "\n",
+    "## 1. Install UniFace"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "%pip install -q \"uniface[cpu]\"\n",
+    "\n",
+    "# Clone repo for assets (Colab only)\n",
+    "import os\n",
+    "if 'COLAB_GPU' in os.environ or 'COLAB_RELEASE_TAG' in os.environ:\n",
+    "    if not os.path.exists('uniface'):\n",
+    "        !git clone --depth 1 https://github.com/yakhyo/uniface.git\n",
+    "    os.chdir('uniface/examples')"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 2. Import Libraries"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import cv2\n",
+    "import numpy as np\n",
+    "import matplotlib.pyplot as plt\n",
+    "\n",
+    "import uniface\n",
+    "from uniface.matting import MODNet\n",
+    "\n",
+    "print(f\"UniFace version: {uniface.__version__}\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 3. Initialize Model\n",
+    "\n",
+    "MODNet has two variants:\n",
+    "- **PHOTOGRAPHIC** (default): optimized for high-quality portrait photos\n",
+    "- **WEBCAM**: optimized for real-time webcam feeds"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "matting = MODNet()\n",
+    "\n",
+    "print(f\"Input size: {matting.input_size}\")\n",
+    "print(f\"Input name: {matting.input_name}\")\n",
+    "print(f\"Output names: {matting.output_names}\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 4. Helper Functions"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def compose(image, matte, background=None):\n",
+    "    \"\"\"Composite foreground over a background using the alpha matte.\"\"\"\n",
+    "    h, w = image.shape[:2]\n",
+    "    matte_3ch = matte[:, :, np.newaxis]\n",
+    "\n",
+    "    if background is None:\n",
+    "        bg = np.full_like(image, (0, 177, 64), dtype=np.uint8)\n",
+    "    else:\n",
+    "        bg = cv2.resize(background, (w, h), interpolation=cv2.INTER_AREA)\n",
+    "\n",
+    "    return (image * matte_3ch + bg * (1 - matte_3ch)).astype(np.uint8)\n",
+    "\n",
+    "\n",
+    "def show_results(image, matte):\n",
+    "    \"\"\"Display original, matte, and green screen as a single merged image.\"\"\"\n",
+    "    matte_vis = cv2.cvtColor((matte * 255).astype(np.uint8), cv2.COLOR_GRAY2BGR)\n",
+    "    green = compose(image, matte)\n",
+    "    merged = np.hstack([image, matte_vis, green])\n",
+    "\n",
+    "    plt.figure(figsize=(18, 6))\n",
+    "    plt.imshow(cv2.cvtColor(merged, cv2.COLOR_BGR2RGB))\n",
+    "    plt.axis(\"off\")\n",
+    "    plt.tight_layout()\n",
+    "    plt.show()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 5. Basic Matting"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "image = cv2.imread(\"../assets/demos/src_portrait1.jpg\")\n",
+    "print(f\"Image shape: {image.shape}\")\n",
+    "\n",
+    "matte = matting.predict(image)\n",
+    "print(f\"Matte shape: {matte.shape}\")\n",
+    "print(f\"Matte dtype: {matte.dtype}\")\n",
+    "print(f\"Matte range: [{matte.min():.3f}, {matte.max():.3f}]\")\n",
+    "\n",
+    "show_results(image, matte)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 6. Transparent Background (RGBA)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "alpha = (matte * 255).astype(np.uint8)\n",
+    "rgba = cv2.cvtColor(image, cv2.COLOR_BGR2BGRA)\n",
+    "rgba[:, :, 3] = alpha\n",
+    "\n",
+    "# Checkerboard background to visualize transparency\n",
+    "h, w = image.shape[:2]\n",
+    "checker = np.zeros((h, w, 3), dtype=np.uint8)\n",
+    "block = 20\n",
+    "for y in range(0, h, block):\n",
+    "    for x in range(0, w, block):\n",
+    "        if (y // block + x // block) % 2 == 0:\n",
+    "            checker[y:y+block, x:x+block] = 200\n",
+    "        else:\n",
+    "            checker[y:y+block, x:x+block] = 255\n",
+    "\n",
+    "matte_3ch = matte[:, :, np.newaxis]\n",
+    "rgba_vis = (image * matte_3ch + checker * (1 - matte_3ch)).astype(np.uint8)\n",
+    "\n",
+    "merged = np.hstack([image, rgba_vis])\n",
+    "\n",
+    "plt.figure(figsize=(16, 5))\n",
+    "plt.imshow(cv2.cvtColor(merged, cv2.COLOR_BGR2RGB))\n",
+    "plt.axis(\"off\")\n",
+    "plt.tight_layout()\n",
+    "plt.show()\n",
+    "\n",
+    "print(f\"RGBA shape: {rgba.shape}\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 7. Custom Background"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Create a gradient background\n",
+    "h, w = image.shape[:2]\n",
+    "gradient = np.zeros((h, w, 3), dtype=np.uint8)\n",
+    "for y in range(h):\n",
+    "    ratio = y / h\n",
+    "    gradient[y, :] = [int(180 * (1 - ratio)), int(100 + 80 * ratio), int(220 * ratio)]\n",
+    "\n",
+    "custom_bg = compose(image, matte, gradient)\n",
+    "green_bg = compose(image, matte)\n",
+    "\n",
+    "merged = np.hstack([image, green_bg, custom_bg])\n",
+    "\n",
+    "plt.figure(figsize=(18, 6))\n",
+    "plt.imshow(cv2.cvtColor(merged, cv2.COLOR_BGR2RGB))\n",
+    "plt.axis(\"off\")\n",
+    "plt.tight_layout()\n",
+    "plt.show()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Summary\n",
+    "\n",
+    "MODNet provides trimap-free portrait matting:\n",
+    "\n",
+    "- **`predict(image)`** — returns `(H, W)` float32 alpha matte in `[0, 1]`\n",
+    "- **No face detection needed** — works on full images directly\n",
+    "- **Two variants** — `PHOTOGRAPHIC` for photos, `WEBCAM` for real-time\n",
+    "- **Compositing** — use the matte for transparent PNGs, green screen, or custom backgrounds\n",
+    "\n",
+    "For more details, see the [Matting docs](https://yakhyo.github.io/uniface/modules/matting/)."
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "base",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.13.5"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -1,5 +1,5 @@
 site_name: UniFace
-site_description: All-in-One Face Analysis Library with ONNX Runtime
+site_description: A Unified Face Analysis Library for Python
 site_author: Yakhyokhuja Valikhujaev
 site_url: https://yakhyo.github.io/uniface

@@ -150,6 +150,7 @@ nav:
      - Landmarks: modules/landmarks.md
      - Attributes: modules/attributes.md
      - Parsing: modules/parsing.md
+      - Matting: modules/matting.md
      - Gaze: modules/gaze.md
      - Head Pose: modules/headpose.md
      - Anti-Spoofing: modules/spoofing.md
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "uniface"
-version = "3.4.0"
-description = "UniFace: A Comprehensive Library for Face Detection, Recognition, Tracking, Landmark Analysis, Face Parsing, Gaze Estimation, Age, and Gender Detection"
+version = "3.5.2"
+description = "UniFace: A Unified Face Analysis Library for Python"
 readme = "README.md"
 license = "MIT"
 authors = [{ name = "Yakhyokhuja Valikhujaev", email = "yakhyo9696@gmail.com" }]
@@ -44,7 +44,6 @@ classifiers = [
 dependencies = [
    "numpy>=1.21.0",
    "opencv-python>=4.5.0",
-    "onnxruntime>=1.16.0",
    "scikit-image>=0.22.0",
    "scipy>=1.7.0",
    "requests>=2.28.0",
@@ -52,8 +51,15 @@ dependencies = [
 ]

 [project.optional-dependencies]
-dev = ["pytest>=7.0.0", "ruff>=0.4.0"]
+cpu = ["onnxruntime>=1.16.0"]
 gpu = ["onnxruntime-gpu>=1.16.0"]
+dev = ["pytest>=7.0.0", "ruff>=0.4.0", "pre-commit>=3.0.0"]
+docs = [
+    "mkdocs-material>=9.0",
+    "pymdown-extensions>=10.0",
+    "mkdocs-git-committers-plugin-2>=1.0",
+    "mkdocs-git-revision-date-localized-plugin>=2.0",
+]

 [project.urls]
 Homepage = "https://github.com/yakhyo/uniface"
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,9 @@
 numpy>=1.21.0
 opencv-python>=4.5.0
-onnxruntime>=1.16.0
 scikit-image>=0.22.0
 scipy>=1.7.0
 requests>=2.28.0
 tqdm>=4.64.0
+# Install ONE of the following (not both):
+# onnxruntime>=1.16.0        # CPU / Apple Silicon  →  pip install uniface[cpu]
+# onnxruntime-gpu>=1.16.0    # NVIDIA CUDA          →  pip install uniface[gpu]
--- a/tests/test_matting.py
+++ b/tests/test_matting.py
@@ -0,0 +1,158 @@
+# Copyright 2025-2026 Yakhyokhuja Valikhujaev
+# Author: Yakhyokhuja Valikhujaev
+# GitHub: https://github.com/yakhyo
+
+
+from __future__ import annotations
+
+import numpy as np
+import pytest
+
+from uniface.constants import MODNetWeights
+from uniface.matting import MODNet, create_matting_model
+
+
+def test_modnet_initialization():
+    """Test MODNet initialization with default weights."""
+    matting = MODNet()
+    assert matting is not None
+    assert matting.input_size == 512
+
+
+def test_modnet_with_webcam_weights():
+    """Test MODNet initialization with webcam variant."""
+    matting = MODNet(model_name=MODNetWeights.WEBCAM)
+    assert matting is not None
+    assert matting.input_size == 512
+
+
+def test_modnet_custom_input_size():
+    """Test MODNet with custom input size."""
+    matting = MODNet(input_size=256)
+    assert matting.input_size == 256
+
+
+def test_modnet_preprocess():
+    """Test preprocessing produces correct tensor shape and dtype."""
+    matting = MODNet()
+
+    image = np.random.randint(0, 255, (480, 640, 3), dtype=np.uint8)
+    tensor, orig_h, orig_w = matting.preprocess(image)
+
+    assert tensor.dtype == np.float32
+    assert tensor.ndim == 4
+    assert tensor.shape[0] == 1
+    assert tensor.shape[1] == 3
+    assert tensor.shape[2] % 32 == 0
+    assert tensor.shape[3] % 32 == 0
+    assert orig_h == 480
+    assert orig_w == 640
+
+
+def test_modnet_preprocess_small_image():
+    """Test preprocessing with image smaller than input_size."""
+    matting = MODNet(input_size=512)
+
+    image = np.random.randint(0, 255, (128, 128, 3), dtype=np.uint8)
+    tensor, orig_h, orig_w = matting.preprocess(image)
+
+    assert tensor.shape[2] % 32 == 0
+    assert tensor.shape[3] % 32 == 0
+    assert orig_h == 128
+    assert orig_w == 128
+
+
+def test_modnet_preprocess_large_image():
+    """Test preprocessing with image larger than input_size."""
+    matting = MODNet(input_size=512)
+
+    image = np.random.randint(0, 255, (1080, 1920, 3), dtype=np.uint8)
+    tensor, orig_h, orig_w = matting.preprocess(image)
+
+    assert tensor.shape[2] % 32 == 0
+    assert tensor.shape[3] % 32 == 0
+    assert orig_h == 1080
+    assert orig_w == 1920
+
+
+def test_modnet_postprocess():
+    """Test postprocessing resizes matte to original dimensions."""
+    matting = MODNet()
+
+    dummy_output = np.random.rand(1, 1, 512, 672).astype(np.float32)
+    matte = matting.postprocess(dummy_output, original_size=(640, 480))
+
+    assert matte.shape == (480, 640)
+    assert matte.dtype == np.float32
+
+
+def test_modnet_predict():
+    """Test end-to-end prediction."""
+    matting = MODNet()
+
+    image = np.random.randint(0, 255, (480, 640, 3), dtype=np.uint8)
+    matte = matting.predict(image)
+
+    assert matte.shape == (480, 640)
+    assert matte.dtype == np.float32
+    assert matte.min() >= 0.0
+    assert matte.max() <= 1.0
+
+
+def test_modnet_callable():
+    """Test that MODNet is callable via __call__."""
+    matting = MODNet()
+    image = np.random.randint(0, 255, (256, 256, 3), dtype=np.uint8)
+
+    matte = matting(image)
+
+    assert matte.shape == (256, 256)
+    assert matte.dtype == np.float32
+
+
+def test_modnet_different_input_sizes():
+    """Test prediction with various image dimensions."""
+    matting = MODNet()
+
+    sizes = [(256, 256), (480, 640), (720, 1280), (300, 500)]
+
+    for h, w in sizes:
+        image = np.random.randint(0, 255, (h, w, 3), dtype=np.uint8)
+        matte = matting.predict(image)
+
+        assert matte.shape == (h, w), f'Failed for size {h}x{w}'
+        assert matte.dtype == np.float32
+
+
+# Factory tests
+
+
+def test_create_matting_model_default():
+    """Test factory with default parameters."""
+    matting = create_matting_model()
+    assert matting is not None
+    assert isinstance(matting, MODNet)
+
+
+def test_create_matting_model_with_enum():
+    """Test factory with enum."""
+    matting = create_matting_model(MODNetWeights.WEBCAM)
+    assert isinstance(matting, MODNet)
+
+
+def test_create_matting_model_with_string():
+    """Test factory with string model name."""
+    matting = create_matting_model('modnet_photographic')
+    assert isinstance(matting, MODNet)
+
+
+def test_create_matting_model_webcam_string():
+    """Test factory with webcam string model name."""
+    matting = create_matting_model('modnet_webcam')
+    assert isinstance(matting, MODNet)
+
+
+def test_create_matting_model_invalid():
+    """Test factory with invalid model name."""
+    with pytest.raises(ValueError, match='Unknown matting model'):
+        create_matting_model('invalid_model')
--- a/uniface/init.py
+++ b/uniface/init.py
@@ -19,6 +19,7 @@ This library provides unified APIs for:
 - Face tracking (ByteTrack with Kalman filtering)
 - Facial landmarks (106-point detection)
 - Face parsing (semantic segmentation)
+- Portrait matting (trimap-free alpha matte)
 - Gaze estimation
 - Head pose estimation
 - Age, gender, and emotion prediction
@@ -30,7 +31,7 @@ from __future__ import annotations

 __license__ = 'MIT'
 __author__ = 'Yakhyokhuja Valikhujaev'
-__version__ = '3.4.0'
+__version__ = '3.5.2'

 import contextlib

@@ -51,6 +52,7 @@ from .detection import (
 from .gaze import MobileGaze, create_gaze_estimator
 from .headpose import HeadPose, create_head_pose_estimator
 from .landmark import Landmark106, create_landmarker
+from .matting import MODNet, create_matting_model
 from .parsing import BiSeNet, XSeg, create_face_parser
 from .privacy import BlurFace
 from .recognition import AdaFace, ArcFace, EdgeFace, MobileFace, SphereFace, create_recognizer
@@ -74,6 +76,7 @@ __all__ = [
    'create_detector',
    'create_face_parser',
    'create_gaze_estimator',
+    'create_matting_model',
    'create_head_pose_estimator',
    'create_landmarker',
    'create_recognizer',
@@ -98,6 +101,8 @@ __all__ = [
    # Head pose models
    'HeadPose',
    'HeadPoseResult',
+    # Matting models
+    'MODNet',
    # Parsing models
    'BiSeNet',
    'XSeg',
--- a/uniface/constants.py
+++ b/uniface/constants.py
@@ -201,6 +201,15 @@ class XSegWeights(str, Enum):
    DEFAULT = "xseg"


+class MODNetWeights(str, Enum):
+    """
+    MODNet: Real-Time Trimap-Free Portrait Matting via Objective Decomposition.
+    https://github.com/yakhyo/modnet
+    """
+    PHOTOGRAPHIC = "modnet_photographic"
+    WEBCAM       = "modnet_webcam"
+
+
 class MiniFASNetWeights(str, Enum):
    """
    MiniFASNet: Lightweight Face Anti-Spoofing models.
@@ -443,6 +452,16 @@ MODEL_REGISTRY: dict[Enum, ModelInfo] = {
        url='https://github.com/yakhyo/face-segmentation/releases/download/weights/xseg.onnx',
        sha256='0b57328efcb839d85973164b617ceee9dfe6cfcb2c82e8a033bba9f4f09b27e5'
    ),
+
+    # MODNet (Portrait Matting)
+    MODNetWeights.PHOTOGRAPHIC: ModelInfo(
+        url='https://github.com/yakhyo/modnet/releases/download/weights/modnet_photographic.onnx',
+        sha256='5069a5e306b9f5e9f4f2b0360264c9f8ea13b257c7c39943c7cf6a2ec3a102ae'
+    ),
+    MODNetWeights.WEBCAM: ModelInfo(
+        url='https://github.com/yakhyo/modnet/releases/download/weights/modnet_webcam.onnx',
+        sha256='de03cc16f3c91f25b7c2f0b42ea1a8d34f40a752234f3887572655e744e55306'
+    ),
 }


--- a/uniface/landmark/models.py
+++ b/uniface/landmark/models.py
@@ -58,7 +58,7 @@ class Landmark106(BaseLandmarker):
        self.model_path = verify_model_weights(model_name)
        self._initialize_model()

-    def _initialize_model(self):
+    def _initialize_model(self) -> None:
        """
        Initialize the ONNX model from the stored model path.

--- a/uniface/matting/init.py
+++ b/uniface/matting/init.py
@@ -0,0 +1,53 @@
+# Copyright 2025-2026 Yakhyokhuja Valikhujaev
+# Author: Yakhyokhuja Valikhujaev
+# GitHub: https://github.com/yakhyo
+
+from __future__ import annotations
+
+from uniface.constants import MODNetWeights
+
+from .base import BaseMatting
+from .modnet import MODNet
+
+__all__ = ['BaseMatting', 'MODNet', 'create_matting_model']
+
+
+def create_matting_model(
+    model_name: str | MODNetWeights = MODNetWeights.PHOTOGRAPHIC,
+    **kwargs,
+) -> BaseMatting:
+    """Factory function to create a portrait matting model.
+
+    Args:
+        model_name: Model to create. Options: ``MODNetWeights.PHOTOGRAPHIC``
+            (high-quality photos), ``MODNetWeights.WEBCAM`` (real-time webcam).
+            Also accepts string values like ``"modnet_photographic"`` or
+            ``"modnet_webcam"``.
+        **kwargs: Additional arguments passed to the model constructor
+            (e.g. ``input_size``, ``providers``).
+
+    Returns:
+        An instance of the requested matting model.
+
+    Raises:
+        ValueError: If the model_name is not recognized.
+
+    Example:
+        >>> matting = create_matting_model()
+        >>> matte = matting.predict(image)
+    """
+    if isinstance(model_name, MODNetWeights):
+        return MODNet(model_name=model_name, **kwargs)
+
+    if isinstance(model_name, str):
+        try:
+            weights = MODNetWeights(model_name)
+            return MODNet(model_name=weights, **kwargs)
+        except ValueError:
+            pass
+
+        valid_models = [m.value for m in MODNetWeights]
+        raise ValueError(f"Unknown matting model: '{model_name}'. Valid options are: {', '.join(valid_models)}")
+
+    valid_models = [m.value for m in MODNetWeights]
+    raise ValueError(f"Unknown matting model: '{model_name}'. Valid options are: {', '.join(valid_models)}")
--- a/uniface/matting/base.py
+++ b/uniface/matting/base.py
@@ -0,0 +1,88 @@
+# Copyright 2025-2026 Yakhyokhuja Valikhujaev
+# Author: Yakhyokhuja Valikhujaev
+# GitHub: https://github.com/yakhyo
+
+from __future__ import annotations
+
+from abc import ABC, abstractmethod
+
+import numpy as np
+
+
+class BaseMatting(ABC):
+    """Abstract base class for portrait matting models.
+
+    Unlike face parsers that operate on face crops and produce class labels or
+    face-region masks, matting models operate on full images and produce a soft
+    alpha matte (float32 in [0, 1]) separating foreground from background.
+
+    Subclasses must implement the full pipeline: model initialization,
+    preprocessing, postprocessing, and the ``predict`` entry point.
+    """
+
+    @abstractmethod
+    def _initialize_model(self) -> None:
+        """Initialize the underlying model for inference.
+
+        This method should handle loading model weights, creating the
+        inference session (e.g., ONNX Runtime), and any necessary
+        setup procedures to prepare the model for prediction.
+
+        Raises:
+            RuntimeError: If the model fails to load or initialize.
+        """
+        raise NotImplementedError('Subclasses must implement the _initialize_model method.')
+
+    @abstractmethod
+    def preprocess(self, image: np.ndarray) -> tuple[np.ndarray, int, int]:
+        """Preprocess the input image for model inference.
+
+        Args:
+            image: An image in BGR format with shape ``(H, W, 3)``.
+
+        Returns:
+            A tuple of ``(tensor, orig_h, orig_w)`` where *tensor* is the
+            preprocessed image ready for inference.
+        """
+        raise NotImplementedError('Subclasses must implement the preprocess method.')
+
+    @abstractmethod
+    def postprocess(self, outputs: np.ndarray, original_size: tuple[int, int]) -> np.ndarray:
+        """Postprocess raw model outputs into an alpha matte.
+
+        Args:
+            outputs: Raw outputs from the model inference.
+            original_size: Original image size as ``(width, height)``.
+
+        Returns:
+            Alpha matte with shape ``(H, W)`` and values in ``[0, 1]``.
+        """
+        raise NotImplementedError('Subclasses must implement the postprocess method.')
+
+    @abstractmethod
+    def predict(self, image: np.ndarray) -> np.ndarray:
+        """Run end-to-end matting on an image.
+
+        Args:
+            image: An image in BGR format with shape ``(H, W, 3)``.
+
+        Returns:
+            Alpha matte with shape ``(H, W)``, float32 in ``[0, 1]``.
+
+        Example:
+            >>> matting = create_matting_model()
+            >>> matte = matting.predict(image)
+            >>> print(f'Matte shape: {matte.shape}, dtype: {matte.dtype}')
+        """
+        raise NotImplementedError('Subclasses must implement the predict method.')
+
+    def __call__(self, image: np.ndarray) -> np.ndarray:
+        """Callable shortcut for :meth:`predict`.
+
+        Args:
+            image: An image in BGR format with shape ``(H, W, 3)``.
+
+        Returns:
+            Alpha matte with shape ``(H, W)``, float32 in ``[0, 1]``.
+        """
+        return self.predict(image)
--- a/uniface/matting/modnet.py
+++ b/uniface/matting/modnet.py
@@ -0,0 +1,162 @@
+# Copyright 2025-2026 Yakhyokhuja Valikhujaev
+# Author: Yakhyokhuja Valikhujaev
+# GitHub: https://github.com/yakhyo
+
+from __future__ import annotations
+
+import cv2
+import numpy as np
+
+from uniface.constants import MODNetWeights
+from uniface.log import Logger
+from uniface.model_store import verify_model_weights
+from uniface.onnx_utils import create_onnx_session
+
+from .base import BaseMatting
+
+__all__ = ['MODNet']
+
+STRIDE = 32
+
+
+class MODNet(BaseMatting):
+    """MODNet: Real-Time Trimap-Free Portrait Matting with ONNX Runtime.
+
+    MODNet produces a soft alpha matte from a full image without requiring
+    a trimap. It uses a MobileNetV2 backbone with low-resolution, high-resolution,
+    and fusion branches to generate accurate mattes at real-time speed.
+
+    Two pretrained variants are available:
+
+    - ``PHOTOGRAPHIC``: optimized for high-quality portrait photos.
+    - ``WEBCAM``: optimized for real-time webcam feeds.
+
+    Reference:
+        Ke et al., "MODNet: Real-Time Trimap-Free Portrait Matting via
+        Objective Decomposition", AAAI 2022.
+        https://github.com/yakhyo/modnet
+
+    Args:
+        model_name: The enum specifying the MODNet variant to load.
+            Defaults to ``MODNetWeights.PHOTOGRAPHIC``.
+        input_size: Target size for the shorter side during preprocessing.
+            The image is resized so its shorter side equals this value
+            (aspect ratio preserved), then both dimensions are floored to
+            multiples of 32. Defaults to 512.
+        providers: ONNX Runtime execution providers. If ``None``, auto-detects
+            the best available provider.
+
+    Attributes:
+        input_size (int): Target shorter-side size for preprocessing.
+
+    Example:
+        >>> from uniface.matting import MODNet
+        >>>
+        >>> matting = MODNet()
+        >>> matte = matting.predict(image)  # (H, W) float32 in [0, 1]
+        >>>
+        >>> # Composite onto green background
+        >>> import numpy as np
+        >>> bg = np.full_like(image, (0, 177, 64), dtype=np.uint8)
+        >>> alpha = matte[..., np.newaxis]
+        >>> result = (image * alpha + bg * (1 - alpha)).astype(np.uint8)
+    """
+
+    def __init__(
+        self,
+        model_name: MODNetWeights = MODNetWeights.PHOTOGRAPHIC,
+        input_size: int = 512,
+        providers: list[str] | None = None,
+    ) -> None:
+        Logger.info(f'Initializing MODNet with model={model_name}, input_size={input_size}')
+
+        self.input_size = input_size
+        self.providers = providers
+
+        self.model_path = verify_model_weights(model_name)
+        self._initialize_model()
+
+    def _initialize_model(self) -> None:
+        """Initialize the ONNX model from the stored model path.
+
+        Raises:
+            RuntimeError: If the model fails to load or initialize.
+        """
+        try:
+            self.session = create_onnx_session(self.model_path, providers=self.providers)
+
+            input_cfg = self.session.get_inputs()[0]
+            self.input_name = input_cfg.name
+
+            outputs = self.session.get_outputs()
+            self.output_names = [output.name for output in outputs]
+
+            Logger.info(f'MODNet initialized with input_size={self.input_size}')
+
+        except Exception as e:
+            Logger.error(f"Failed to load MODNet model from '{self.model_path}'", exc_info=True)
+            raise RuntimeError(f'Failed to initialize MODNet model: {e}') from e
+
+    def preprocess(self, image: np.ndarray) -> tuple[np.ndarray, int, int]:
+        """Preprocess a BGR image for MODNet inference.
+
+        The image is converted to RGB, resized so its shorter side matches
+        ``input_size`` (aspect ratio preserved), floored to multiples of 32,
+        and normalized to ``[-1, 1]``.
+
+        Args:
+            image: Input image in BGR format with shape ``(H, W, 3)``.
+
+        Returns:
+            A tuple of ``(tensor, orig_h, orig_w)`` where *tensor* has shape
+            ``(1, 3, H', W')`` in float32.
+        """
+        orig_h, orig_w = image.shape[:2]
+        rgb = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
+
+        if max(orig_h, orig_w) < self.input_size or min(orig_h, orig_w) > self.input_size:
+            if orig_w >= orig_h:
+                new_h = self.input_size
+                new_w = int(orig_w / orig_h * self.input_size)
+            else:
+                new_w = self.input_size
+                new_h = int(orig_h / orig_w * self.input_size)
+        else:
+            new_h, new_w = orig_h, orig_w
+
+        new_h = new_h - (new_h % STRIDE)
+        new_w = new_w - (new_w % STRIDE)
+        rgb = cv2.resize(rgb, (new_w, new_h), interpolation=cv2.INTER_AREA)
+
+        x = rgb.astype(np.float32) / 255.0
+        x = (x - 0.5) / 0.5
+        x = np.transpose(x, (2, 0, 1))
+
+        return np.expand_dims(x, axis=0), orig_h, orig_w
+
+    def postprocess(self, outputs: np.ndarray, original_size: tuple[int, int]) -> np.ndarray:
+        """Postprocess raw model output into an alpha matte.
+
+        Args:
+            outputs: Raw ONNX output with shape ``(1, 1, H', W')``.
+            original_size: Target size as ``(width, height)``.
+
+        Returns:
+            Alpha matte with shape ``(H, W)``, float32 in ``[0, 1]``.
+        """
+        matte = outputs[0, 0]
+        matte = cv2.resize(matte, original_size, interpolation=cv2.INTER_AREA)
+        return matte
+
+    def predict(self, image: np.ndarray) -> np.ndarray:
+        """Run portrait matting on a BGR image.
+
+        Args:
+            image: Input image in BGR format with shape ``(H, W, 3)``.
+
+        Returns:
+            Alpha matte with shape ``(H, W)``, float32 in ``[0, 1]``.
+        """
+        tensor, orig_h, orig_w = self.preprocess(image)
+        outputs = self.session.run(self.output_names, {self.input_name: tensor})
+        return self.postprocess(outputs[0], (orig_w, orig_h))
--- a/uniface/onnx_utils.py
+++ b/uniface/onnx_utils.py
@@ -12,7 +12,15 @@ from __future__ import annotations

 import functools

-import onnxruntime as ort
+try:
+    import onnxruntime as ort
+except ImportError as e:
+    raise ImportError(
+        'onnxruntime is not installed. Install it with one of:\n'
+        '  pip install uniface[cpu]   # CPU / Apple Silicon\n'
+        '  pip install uniface[gpu]   # NVIDIA GPU (CUDA)\n'
+        'Do not install both — they conflict.'
+    ) from e

 from uniface.log import Logger

--- a/uniface/privacy/blur.py
+++ b/uniface/privacy/blur.py
@@ -4,11 +4,14 @@

 from __future__ import annotations

-from typing import ClassVar
+from typing import TYPE_CHECKING, ClassVar

 import cv2
 import numpy as np

+if TYPE_CHECKING:
+    from uniface.types import Face
+
 __all__ = ['BlurFace', 'EllipticalBlur']


@@ -137,7 +140,7 @@ class BlurFace:
    def anonymize(
        self,
        image: np.ndarray,
-        faces: list,
+        faces: list[Face],
        inplace: bool = False,
    ) -> np.ndarray:
        """Anonymize faces in an image.
Author	SHA1	Message	Date
github-actions[bot]	a34f376da0	chore: Release v3.5.2	2026-04-27 15:04:20 +00:00
Yakhyokhuja Valikhujaev	2b29706615	ci: Add end-to-end deployment pipeline and fix docs auto-trigger (#112 )	2026-04-27 23:59:09 +09:00
github-actions[bot]	f6d3cf33f0	chore: Release v3.5.1	2026-04-27 11:53:21 +00:00
Yakhyokhuja Valikhujaev	0eb042425c	chore: Minor changes to workflow names and docs (#111 )	2026-04-27 20:51:50 +09:00
github-actions[bot]	35c0b6d539	chore: Release v3.5.1rc1	2026-04-25 15:17:54 +00:00
Yakhyokhuja Valikhujaev	13c4ac83d8	feat: Update the release workflow and package installation command (#110 ) * fix: Fix installation conflict between onnxruntime and onnxruntime-gpu * fix: Fix CI, notebooks, type hints, and packaging issues found in audit * feat: Add new release config * ci: Automate release pipeline and document release process	2026-04-25 23:59:00 +09:00
Yakhyokhuja Valikhujaev	6ce397b811	feat: Add MODNet portrait matting (#108 ) * feat: Add MODNet portrait matting * docs: Update docs and example of portrait matting * fix: Fix linting issue	2026-04-11 23:30:32 +09:00