Lepton #image #compression: saving 22% losslessly from images at 15MB/s | Dropbox Tech Blog
▻http://blogs.dropbox.com/tech/2016/07/lepton-image-compression-saving-22-losslessly-from-images-at-15mbs
▻https://dropboxtechblog.files.wordpress.com/2016/07/lepton-8.png?w=150
Lepton achieves a 22% savings reduction for existing JPEG images, by predicting coefficients in JPEG blocks and feeding those predictions as context into an arithmetic coder. Lepton preserves the original file bit-for-bit perfectly. It compresses JPEG files at a rate of 5 megabytes per second and decodes them back to the original bits at 15 megabytes per second, securely, deterministically, and in under 24 megabytes of memory.
sources : ▻https://github.com/dropbox/lepton
