6 lines
169 B
Python
6 lines
169 B
Python
def brightness( im_file ):
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im = Image.open(im_file)
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stat = ImageStat.Stat(im)
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r,g,b = stat.mean
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return math.sqrt(0.241*(r**2) + 0.691*(g**2) + 0.068*(b**2))
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