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| Pathologically Eclectic Rubbish Lister | |
| PerlMonks |
Re: BMP: Drawing or photograph?by Anonymous Monk |
| on Oct 29, 2012 at 12:35 UTC ( #1001353=note: print w/ replies, xml ) | Need Help?? |
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Just pull a histogram on a random sample of the pixels, then measure the standard deviation. If it's low, i.e. if the histogram is well-distributed between highs and lows, and especially among colors, it's a photograph. If it's high, and tends toward white or black pixels, it's a drawing. Asssemble a test set of a few hundred of both types for algorithm-training purposes.
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