def
HOG_features(im):
#
start_time1=time.time()
hog = cv2.HOGDescriptor()
winStride = (8, 8)
padding = (8, 8)
hist = hog.compute(im, winStride, padding)
hist = hist.reshape((-1,))
#stop_time1=time.time()#print (stop_time1-start_time1)return hist
原文：https://www.cnblogs.com/wjjcjj/p/14631760.html
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