mirror of
https://github.com/deepinsight/insightface.git
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69 lines
1.9 KiB
Python
69 lines
1.9 KiB
Python
# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os
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import pickle
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import struct
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import random
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import multiprocessing
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import numpy as np
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import cv2
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import json
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def readkv(f):
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"""readkv"""
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keylendata = f.read(4)
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if len(keylendata) != 4:
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return None
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keylen = struct.unpack('I', keylendata)[0]
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if keylen > 5000:
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raise Exception('wrong key len' + str(keylen))
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key = f.read(keylen)
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valuelen = struct.unpack('I', f.read(4))[0]
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value = f.read(valuelen)
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return key, value
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def writekv(f, k, v, flush=True):
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"""writekv"""
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f.write(struct.pack('I', len(k)))
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f.write(k)
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f.write(struct.pack('I', len(v)))
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f.write(v)
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if flush:
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f.flush()
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return
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def trans_img_to_bin(img_name, output_path):
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with open(img_name, "rb") as fin:
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img = fin.read()
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key = os.path.split(img_name)[-1]
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with open(output_path, "wb") as fout:
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writekv(fout, key.encode(), pickle.dumps(img, -1))
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return
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def read_img_from_bin(input_path):
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# the file can exist many key-vals, but it just save one in fact.
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with open(input_path, "rb") as fin:
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r = readkv(fin)
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assert r is not None
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_, value = r
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value = pickle.loads(value)
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value = np.frombuffer(value, dtype='uint8')
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img = cv2.imdecode(value, 1)
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return img
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