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For example Canny Edge Detector.
It is in OpenCV available for use in Java / C.
On command line experiments via ImageMagick?
convert -negate -canny 0x1+10%+30% big.jpg.3 big3-canny.jpg
Similar maps…
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As alternative for LIRE identity please compare performance of:
- BlockHash
- PHash (DCT / Radial / MM )
- DHash
and basic comparing with Hamming distance (maybe hmsearch or brutal force).
To be pa…
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I've developed a library for high-quality quantization that IMHO is a big quality improvement over an old algorithm currently used by libgd (you can try it at http://tinypng.org ).
http://pngquant.or…
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Attempt to detect duplicate image uploads client-side before upload.
Concerns are performance when iterating over the pixels of large (hi-res) image files, but that may be able to be mitigated by sh…