processors.py 文件源码

def lsb_decode(image):
    try:
        red, green, blue = image.split()
        watermark = ImageMath.eval("(a&0x1)*0x01", a=red)
        watermark = watermark.convert('L')
        watermark_bytes = bytes(watermark.getdata())
        watermark_bits_array = np.fromiter(watermark_bytes, dtype=np.uint8)
        watermark_bytes_array = np.packbits(watermark_bits_array)
        watermark_bytes = bytes(watermark_bytes_array)
        bytes_io = BytesIO(watermark_bytes)
        return load(bytes_io)
    except UnpicklingError:
        return ''