# UniFace: All-in-One Face Analysis Library
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[](https://pypi.org/project/uniface/)
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[](https://pepy.tech/project/uniface)
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**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.
---
## Features
- **High-Speed Face Detection**: ONNX-optimized RetinaFace, SCRFD, and YOLOv5-Face models
- **Facial Landmark Detection**: Accurate 106-point landmark localization
- **Face Recognition**: ArcFace, MobileFace, and SphereFace embeddings
- **Face Parsing**: BiSeNet-based semantic segmentation with 19 facial component classes
- **Gaze Estimation**: Real-time gaze direction prediction with MobileGaze
- **Attribute Analysis**: Age, gender, and emotion detection
- **Face Anonymization**: Privacy-preserving face blurring with 5 methods (pixelate, gaussian, blackout, elliptical, median)
- **Face Alignment**: Precise alignment for downstream tasks
- **Hardware Acceleration**: ARM64 optimizations (Apple Silicon), CUDA (NVIDIA), CPU fallback
- **Simple API**: Intuitive factory functions and clean interfaces
- **Production-Ready**: Type hints, comprehensive logging, PEP8 compliant
---
## Installation
### Quick Install (All Platforms)
```bash
pip install uniface
```
### Platform-Specific Installation
#### macOS (Apple Silicon - M1/M2/M3/M4)
For Apple Silicon Macs, the standard installation automatically includes optimized ARM64 support:
```bash
pip install uniface
```
The base `onnxruntime` package (included with uniface) has native Apple Silicon support with ARM64 optimizations built-in since version 1.13+.
#### Linux/Windows with NVIDIA GPU
For CUDA acceleration on NVIDIA GPUs:
```bash
pip install uniface[gpu]
```
**Requirements:**
- CUDA 11.x or 12.x
- cuDNN 8.x
- See [ONNX Runtime GPU requirements](https://onnxruntime.ai/docs/execution-providers/CUDA-ExecutionProvider.html)
#### CPU-Only (All Platforms)
```bash
pip install uniface
```
### Install from Source
```bash
git clone https://github.com/yakhyo/uniface.git
cd uniface
pip install -e .
```
---
## Quick Start
### Face Detection
```python
import cv2
from uniface import RetinaFace
# Initialize detector
detector = RetinaFace()
# Load image
image = cv2.imread("image.jpg")
# Detect faces
faces = detector.detect(image)
# Process results
for face in faces:
bbox = face['bbox'] # [x1, y1, x2, y2]
confidence = face['confidence']
landmarks = face['landmarks'] # 5-point landmarks
print(f"Face detected with confidence: {confidence:.2f}")
```
### Face Recognition
```python
from uniface import ArcFace, RetinaFace
from uniface import compute_similarity
# Initialize models
detector = RetinaFace()
recognizer = ArcFace()
# Detect and extract embeddings
faces1 = detector.detect(image1)
faces2 = detector.detect(image2)
embedding1 = recognizer.get_normalized_embedding(image1, faces1[0]['landmarks'])
embedding2 = recognizer.get_normalized_embedding(image2, faces2[0]['landmarks'])
# Compare faces
similarity = compute_similarity(embedding1, embedding2)
print(f"Similarity: {similarity:.4f}")
```
### Facial Landmarks
```python
from uniface import RetinaFace, Landmark106
detector = RetinaFace()
landmarker = Landmark106()
faces = detector.detect(image)
landmarks = landmarker.get_landmarks(image, faces[0]['bbox'])
# Returns 106 (x, y) landmark points
```
### Age & Gender Detection
```python
from uniface import RetinaFace, AgeGender
detector = RetinaFace()
age_gender = AgeGender()
faces = detector.detect(image)
gender, age = age_gender.predict(image, faces[0]['bbox'])
gender_str = 'Female' if gender == 0 else 'Male'
print(f"{gender_str}, {age} years old")
```
### Gaze Estimation
```python
from uniface import RetinaFace, MobileGaze
from uniface.visualization import draw_gaze
import numpy as np
detector = RetinaFace()
gaze_estimator = MobileGaze()
faces = detector.detect(image)
for face in faces:
bbox = face['bbox']
x1, y1, x2, y2 = map(int, bbox[:4])
face_crop = image[y1:y2, x1:x2]
pitch, yaw = gaze_estimator.estimate(face_crop)
print(f"Gaze: pitch={np.degrees(pitch):.1f}°, yaw={np.degrees(yaw):.1f}°")
# Visualize
draw_gaze(image, bbox, pitch, yaw)
```
### Face Parsing
```python
from uniface.parsing import BiSeNet
from uniface.visualization import vis_parsing_maps
# Initialize parser
parser = BiSeNet() # Uses ResNet18 by default
# Parse face image (already cropped)
mask = parser.parse(face_image)
# Visualize with overlay
import cv2
face_rgb = cv2.cvtColor(face_image, cv2.COLOR_BGR2RGB)
vis_result = vis_parsing_maps(face_rgb, mask, save_image=False)
# mask contains 19 classes: skin, eyes, nose, mouth, hair, etc.
print(f"Unique classes: {len(np.unique(mask))}")
```
### Face Anonymization
Protect privacy by blurring or pixelating faces with 5 different methods:
```python
from uniface import RetinaFace
from uniface.privacy import BlurFace, anonymize_faces
import cv2
# Method 1: One-liner with automatic detection
image = cv2.imread("photo.jpg")
anonymized = anonymize_faces(image, method='pixelate')
cv2.imwrite("anonymized.jpg", anonymized)
# Method 2: Manual control with custom parameters
detector = RetinaFace()
blurrer = BlurFace(method='gaussian', blur_strength=5.0)
faces = detector.detect(image)
anonymized = blurrer.anonymize(image, faces)
# Available blur methods:
methods = {
'pixelate': BlurFace(method='pixelate', pixel_blocks=10), # Blocky effect (news media standard)
'gaussian': BlurFace(method='gaussian', blur_strength=3.0), # Smooth, natural blur
'blackout': BlurFace(method='blackout', color=(0, 0, 0)), # Solid color boxes (maximum privacy)
'elliptical': BlurFace(method='elliptical', margin=20), # Soft oval blur (natural face shape)
'median': BlurFace(method='median', blur_strength=3.0) # Edge-preserving blur
}
# Real-time webcam anonymization
cap = cv2.VideoCapture(0)
detector = RetinaFace()
blurrer = BlurFace(method='pixelate')
while True:
ret, frame = cap.read()
if not ret:
break
faces = detector.detect(frame)
frame = blurrer.anonymize(frame, faces, inplace=True)
cv2.imshow('Anonymized', frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
cap.release()
cv2.destroyAllWindows()
```
---
## Documentation
- [**QUICKSTART.md**](QUICKSTART.md) - 5-minute getting started guide
- [**MODELS.md**](MODELS.md) - Model zoo, benchmarks, and selection guide
- [**Examples**](examples/) - Jupyter notebooks with detailed examples
---
## API Overview
### Factory Functions (Recommended)
```python
from uniface.detection import RetinaFace, SCRFD
from uniface.recognition import ArcFace
from uniface.landmark import Landmark106
from uniface.privacy import BlurFace, anonymize_faces
from uniface.constants import SCRFDWeights
# Create detector with default settings
detector = RetinaFace()
# Create with custom config
detector = SCRFD(
model_name=SCRFDWeights.SCRFD_10G_KPS, # SCRFDWeights.SCRFD_500M_KPS
conf_thresh=0.4,
input_size=(640, 640)
)
# Or with defaults settings: detector = SCRFD()
# Recognition and landmarks
recognizer = ArcFace()
landmarker = Landmark106()
```
### Direct Model Instantiation
```python
from uniface import RetinaFace, SCRFD, YOLOv5Face, ArcFace, MobileFace, SphereFace
from uniface.constants import RetinaFaceWeights, YOLOv5FaceWeights
# Detection
detector = RetinaFace(
model_name=RetinaFaceWeights.MNET_V2,
conf_thresh=0.5,
nms_thresh=0.4
)
# Or detector = RetinaFace()
# YOLOv5-Face detection
detector = YOLOv5Face(
model_name=YOLOv5FaceWeights.YOLOV5S,
conf_thresh=0.6,
nms_thresh=0.5
)
# Or detector = YOLOv5Face
# Recognition
recognizer = ArcFace() # Uses default weights
recognizer = MobileFace() # Lightweight alternative
recognizer = SphereFace() # Angular softmax alternative
```
### High-Level Detection API
```python
from uniface import detect_faces
# One-line face detection
faces = detect_faces(image, method='retinaface', conf_thresh=0.8) # methods: retinaface, scrfd, yolov5face
```
### Key Parameters (quick reference)
**Detection**
| Class | Key params (defaults) | Notes |
| -------------- | ------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------- |
| `RetinaFace` | `model_name=RetinaFaceWeights.MNET_V2`, `conf_thresh=0.5`, `nms_thresh=0.4`, `input_size=(640, 640)`, `dynamic_size=False` | Supports 5-point landmarks |
| `SCRFD` | `model_name=SCRFDWeights.SCRFD_10G_KPS`, `conf_thresh=0.5`, `nms_thresh=0.4`, `input_size=(640, 640)` | Supports 5-point landmarks |
| `YOLOv5Face` | `model_name=YOLOv5FaceWeights.YOLOV5S`, `conf_thresh=0.6`, `nms_thresh=0.5`, `input_size=640` (fixed) | Supports 5-point landmarks; models: YOLOV5N/S/M; `input_size` must be 640 |
**Recognition**
| Class | Key params (defaults) | Notes |
| -------------- | ----------------------------------------- | ------------------------------------- |
| `ArcFace` | `model_name=ArcFaceWeights.MNET` | Returns 512-dim normalized embeddings |
| `MobileFace` | `model_name=MobileFaceWeights.MNET_V2` | Lightweight embeddings |
| `SphereFace` | `model_name=SphereFaceWeights.SPHERE20` | Angular softmax variant |
**Landmark & Attributes**
| Class | Key params (defaults) | Notes |
| --------------- | --------------------------------------------------------------------- | --------------------------------------- |
| `Landmark106` | No required params | 106-point landmarks |
| `AgeGender` | `model_name=AgeGenderWeights.DEFAULT`; `input_size` auto-detected | Requires bbox; ONNXRuntime |
| `Emotion` | `model_weights=DDAMFNWeights.AFFECNET7`, `input_size=(112, 112)` | Requires 5-point landmarks; TorchScript |
**Gaze Estimation**
| Class | Key params (defaults) | Notes |
| ------------- | ------------------------------------------ | ------------------------------------ |
| `MobileGaze` | `model_name=GazeWeights.RESNET34` | Returns (pitch, yaw) angles in radians; trained on Gaze360 |
**Face Parsing**
| Class | Key params (defaults) | Notes |
| ---------- | ---------------------------------------- | ------------------------------------ |
| `BiSeNet` | `model_name=ParsingWeights.RESNET18`, `input_size=(512, 512)` | 19 facial component classes; BiSeNet architecture with ResNet backbone |
---
## Model Performance
### Face Detection (WIDER FACE Dataset)
| Model | Easy | Medium | Hard | Use Case |
| ------------------ | ------ | ------ | ------ | ---------------------- |
| retinaface_mnet025 | 88.48% | 87.02% | 80.61% | Mobile/Edge devices |
| retinaface_mnet_v2 | 91.70% | 91.03% | 86.60% | Balanced (recommended) |
| retinaface_r34 | 94.16% | 93.12% | 88.90% | High accuracy |
| scrfd_500m | 90.57% | 88.12% | 68.51% | Real-time applications |
| scrfd_10g | 95.16% | 93.87% | 83.05% | Best accuracy/speed |
| yolov5n_face | 93.61% | 91.52% | 80.53% | Lightweight/Mobile |
| yolov5s_face | 94.33% | 92.61% | 83.15% | Real-time + accuracy |
| yolov5m_face | 95.30% | 93.76% | 85.28% | High accuracy |
_Accuracy values from original papers: [RetinaFace](https://arxiv.org/abs/1905.00641), [SCRFD](https://arxiv.org/abs/2105.04714), [YOLOv5-Face](https://arxiv.org/abs/2105.12931)_
**Benchmark on your hardware:**
```bash
python scripts/run_detection.py --image assets/test.jpg --iterations 100
```
See [MODELS.md](MODELS.md) for detailed model information and selection guide.
---
## Examples
### Jupyter Notebooks
Interactive examples covering common face analysis tasks:
| Example | Description | Notebook |
|---------|-------------|----------|
| **Face Detection** | Detect faces and facial landmarks | [face_detection.ipynb](examples/face_detection.ipynb) |
| **Face Alignment** | Align and crop faces for recognition | [face_alignment.ipynb](examples/face_alignment.ipynb) |
| **Face Recognition** | Extract face embeddings and compare faces | [face_analyzer.ipynb](examples/face_analyzer.ipynb) |
| **Face Verification** | Compare two faces to verify identity | [face_verification.ipynb](examples/face_verification.ipynb) |
| **Face Search** | Find a person in a group photo | [face_search.ipynb](examples/face_search.ipynb) |
| **Face Parsing** | Segment face into semantic components | [face_parsing.ipynb](examples/face_parsing.ipynb) |
| **Face Anonymization** | Blur or pixelate faces for privacy protection | [face_anonymization.ipynb](examples/face_anonymization.ipynb) |
| **Gaze Estimation** | Estimate gaze direction from face images | [gaze_estimation.ipynb](examples/gaze_estimation.ipynb) |
### Webcam Face Detection
```python
import cv2
from uniface import RetinaFace
from uniface.visualization import draw_detections
detector = RetinaFace()
cap = cv2.VideoCapture(0)
while True:
ret, frame = cap.read()
if not ret:
break
faces = detector.detect(frame)
# Extract data for visualization
bboxes = [f['bbox'] for f in faces]
scores = [f['confidence'] for f in faces]
landmarks = [f['landmarks'] for f in faces]
draw_detections(
image=frame,
bboxes=bboxes,
scores=scores,
landmarks=landmarks,
vis_threshold=0.6,
)
cv2.imshow("Face Detection", frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
cap.release()
cv2.destroyAllWindows()
```
### Face Search System
```python
import numpy as np
from uniface import RetinaFace, ArcFace
detector = RetinaFace()
recognizer = ArcFace()
# Build face database
database = {}
for person_id, image_path in person_images.items():
image = cv2.imread(image_path)
faces = detector.detect(image)
if faces:
embedding = recognizer.get_normalized_embedding(
image, faces[0]['landmarks']
)
database[person_id] = embedding
# Search for a face
query_image = cv2.imread("query.jpg")
query_faces = detector.detect(query_image)
if query_faces:
query_embedding = recognizer.get_normalized_embedding(
query_image, query_faces[0]['landmarks']
)
# Find best match
best_match = None
best_similarity = -1
for person_id, db_embedding in database.items():
similarity = np.dot(query_embedding, db_embedding.T)[0][0]
if similarity > best_similarity:
best_similarity = similarity
best_match = person_id
print(f"Best match: {best_match} (similarity: {best_similarity:.4f})")
```
More examples in the [examples/](examples/) directory.
---
## Advanced Configuration
### Custom ONNX Runtime Providers
```python
from uniface.onnx_utils import get_available_providers, create_onnx_session
# Check available providers
providers = get_available_providers()
print(f"Available: {providers}")
# Force CPU-only execution
from uniface import RetinaFace
detector = RetinaFace()
# Internally uses create_onnx_session() which auto-selects best provider
```
### Model Download and Caching
Models are automatically downloaded on first use and cached in `~/.uniface/models/`.
```python
from uniface.model_store import verify_model_weights
from uniface.constants import RetinaFaceWeights
# Manually download and verify a model
model_path = verify_model_weights(
RetinaFaceWeights.MNET_V2,
root='./custom_models' # Custom cache directory
)
```
### Logging Configuration
```python
from uniface import Logger
import logging
# Set logging level
Logger.setLevel(logging.DEBUG) # DEBUG, INFO, WARNING, ERROR
# Disable logging
Logger.setLevel(logging.CRITICAL)
```
---
## Testing
```bash
# Run all tests
pytest
# Run with coverage
pytest --cov=uniface --cov-report=html
# Run specific test file
pytest tests/test_retinaface.py -v
```
---
## Development
### Setup Development Environment
```bash
git clone https://github.com/yakhyo/uniface.git
cd uniface
# Install in editable mode with dev dependencies
pip install -e ".[dev]"
# Run tests
pytest
```
### Code Formatting
This project uses [Ruff](https://docs.astral.sh/ruff/) for linting and formatting.
```bash
# Format code
ruff format .
# Check for linting errors
ruff check .
# Auto-fix linting errors
ruff check . --fix
```
Ruff configuration is in `pyproject.toml`. Key settings:
- Line length: 120
- Python target: 3.10+
- Import sorting: `uniface` as first-party
### Project Structure
```
uniface/
├── uniface/
│ ├── detection/ # Face detection models
│ ├── recognition/ # Face recognition models
│ ├── landmark/ # Landmark detection
│ ├── parsing/ # Face parsing
│ ├── gaze/ # Gaze estimation
│ ├── attribute/ # Age, gender, emotion
│ ├── privacy/ # Face anonymization & blurring
│ ├── onnx_utils.py # ONNX Runtime utilities
│ ├── model_store.py # Model download & caching
│ └── visualization.py # Drawing utilities
├── tests/ # Unit tests
├── examples/ # Example notebooks
└── scripts/ # Utility scripts
```
---
## References
- **RetinaFace Training**: [yakhyo/retinaface-pytorch](https://github.com/yakhyo/retinaface-pytorch) - PyTorch implementation and training code
- **YOLOv5-Face ONNX**: [yakhyo/yolov5-face-onnx-inference](https://github.com/yakhyo/yolov5-face-onnx-inference) - ONNX inference implementation
- **Face Recognition Training**: [yakhyo/face-recognition](https://github.com/yakhyo/face-recognition) - ArcFace, MobileFace, SphereFace training code
- **Face Parsing Training**: [yakhyo/face-parsing](https://github.com/yakhyo/face-parsing) - BiSeNet face parsing training code and pretrained weights
- **Gaze Estimation Training**: [yakhyo/gaze-estimation](https://github.com/yakhyo/gaze-estimation) - MobileGaze training code and pretrained weights
- **InsightFace**: [deepinsight/insightface](https://github.com/deepinsight/insightface) - Model architectures and pretrained weights
## Contributing
Contributions are welcome! Please open an issue or submit a pull request on [GitHub](https://github.com/yakhyo/uniface).
