Created
March 25, 2013 14:56
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| def shannon_entropy(img): | |
| # calculate the shannon entropy for an image | |
| histogram = img.histogram() | |
| histogram_length = sum(histogram) | |
| samples_probability = [float(h) / histogram_length for h in histogram] | |
| return -sum([p * math.log(p, 2) for p in samples_probability if p != 0]) | |
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