Last week, Google released to open source JPEG encoder that can create images file sizes 35% smaller than currently available methods. Called Guetzli, which means cookie in Swiss German, it seems new possibilities for the format that’s been around since the late 1980s!
Using a different method than other optimizers, Guetzli doesn’t have a set of rules or laws in a race to the lowest file size when encoding images.
Instead, Guetzli relies on a tool that measures differences between images the way the human eye detects differences called butteraugli.
The results on images appear that Guetzli walks a fine line by not applying general compression metric that some artifacts as other methods by focusing on areas of
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