othree 前天已經寫過：「mozjpeg 2.0」，不過因為這類性的研究其實對全世界幫助頗大，所以就再提一次...
原文在「Mozilla Advances JPEG Encoding with mozjpeg 2.0」這邊，主要的成果：
With today’s release, mozjpeg 2.0 can reduce file sizes for both baseline and progressive JPEGs by 5% on average compared to those produced by libjpeg-turbo, the standard JPEG library upon which mozjpeg is based [1]. Many images will see further reductions.
文章內也出現了一些關鍵字：
We’ve added options to specifically tune for PSNR, PSNR-HVS-M, SSIM, and MS-SSIM metrics.
PSNR 是最常聽到的，其他幾個 keyword 剛好可以拿來當 entry point。在「Video quality」這邊的 See also 部份也有不少 keyword 可以查...