def binaryzation(image):
"""
:return: ret_images
?????
"""
x, y = image.size
for j in xrange(x):
for k in xrange(y):
pixel = 0 if image.getpixel((j, k)) > 100 else 255
image.putpixel((j, k), pixel)
image = image.filter(ImageFilter.MedianFilter())
return image
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