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http://people.mozilla.org/~josh/lossy_compressed_image_study_july_2014/#image_sets http://people.mozilla.org/~josh/lossy_compressed_image_study... mozjpeg does

by mzs 12y ago

http://people.mozilla.org/~josh/lossy_compressed_image_study_july_2014/#image_sets http://people.mozilla.org/~josh/lossy_compressed_image_study... mozjpeg does Trellis quantization, there is no detailed explanation about jpegmini, a guess is it optimizes the DCT similarly to how it is described in this paper: http://vision.arc.nasa.gov/publications/sid93/sid93.pdf http://vision.arc.nasa.gov/publications/sid93/sid93.pdf

muizelaar 12y ago
There are some papers by the JPEGMini people that give a pretty good hint as to how it works: http://spie.org/Publications/Proceedings/Paper/10.1117/12.872231 http://spie.org/Publications/Proceedings/Paper/10.1117/12.87... http://spie.org/Publications/Proceedings/Paper/10.1117/12.872230 http://spie.org/Publications/Proceedings/Paper/10.1117/12.87...