passportRecognizeNew.py 文件源码

def getDarkColorPercent(image):
    height = np.size(image, 0)
    width = np.size(image, 1)
    imgSize = width * height
    result = cv2.threshold(image, 100, -1, cv2.THRESH_TOZERO)[1]
    nonzero = cv2.countNonZero(result)
    if nonzero > 0:
        return (imgSize - nonzero) / float(imgSize)
    else:
        return 0

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