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How do you determine how similar two images are?

• habosa 14y ago
  Check the FAQ. It's pixel by pixel comparison.
• Lerc 14y ago
  The easy way the Average difference in pixel values. Slightly harder psnr. http://en.wikipedia.org/wiki/Peak_signal-to-noise_ratio http://en.wikipedia.org/wiki/Peak_signal-to-noise_ratio Harder again... ssim http://en.wikipedia.org/wiki/Structural_similarity http://en.wikipedia.org/wiki/Structural_similarity There isn't any real solution to automating similarity as a human sees it. Humans are tricky.
  • AnthonBerg 14y ago
    http://en.wikipedia.org/wiki/Scale-invariant_feature_transform http://en.wikipedia.org/wiki/Scale-invariant_feature_transfo...
• shmageggy 14y ago
  He answers this on the FAQ linked at the top. http://rogeralsing.com/2008/12/09/genetic-programming-mona-lisa-faq/ http://rogeralsing.com/2008/12/09/genetic-programming-mona-l... He just loops over the whole image and does a pixel-by-pixel comparison, taking the difference between each of the R, G, and B channels and summing them all.