Change Details

<http://calendar.perfplanet.com/2015/why-arent-your-images-using-chroma-subsampling/> Looking at today's featured picture at <https://en.wikipedia.org/> it seems we don't have this enabled for our thumbnails. <https://upload.wikimedia.org/wikipedia/commons/thumb/1/13/Poecile_montanus_kleinschmidti.jpg/760px-Poecile_montanus_kleinschmidti.jpg> ``` $ identify -format "%[jpeg:sampling-factor]" Poecile_montanus_kleinschmidti.jpg 1x1,1x1,1x1 ``` Which suggests `4:4:4` as opposed to `4:2:0`. The difference is should be minimal visually (especially for thumbnails), and not only saves bandwidth costs and download time, but also processing memory (useful for mobile) - this contrary to some other compression features.