We opensourced today an early version of a new image codec. It is a 8x8 DCT-based codec, i.e., compatible with JPEG, boosted with a more efficient color space, advanced coding, and a plenty of guetzli/butteraugli like tricks. It decodes around 2/3 of jpeg speed, but the encoding is ludicrously slow. We can reach the same butteraugli scores with 54 % less bytes using PIK than what libjpeg gives us. PIK is both faster to decode and compresses quite a lot better than a guetzlified jpegs compressed with PackJPG/Lepton.
The code is available at https://github.com/google/pik