The Fabio image is not very useful wrt image compression: - grayscale (lenna image is rgb) - very odd 271x257 resolution (lenna image is square 512x512 whi

The Fabio image is not very useful wrt image compression: - grayscale (lenna image is rgb) - very odd 271x257 resolution (lenna image is square 512x512 which is a power of two) - just hair as fine detail features (lenna image has several: hat, feather boa and hair) https://4.bp.blogspot.com/-jUHXZ0jW4Lc/T1t3W0ex2BI/AAAAAAAAFeY/7TY0cTty1og/s400/Fabio.jpg https://4.bp.blogspot.com/-jUHXZ0jW4Lc/T1t3W0ex2BI/AAAAAAAAF... http://www.betapleatedchic.com/uploads/3/0/4/1/30413754/4907429_orig.gif http://www.betapleatedchic.com/uploads/3/0/4/1/30413754/4907... An optimal image would have the following properties: - different textures at different - scale - brightness - frequency - easily recognizable features - color - power of two resolution - no cultural issues - no licensing issues (not a scan of a magazine, globally recognized license, i.e. not "public domain") The problem with faces is that on the one hand, humans are able to tell easily if a feature was destroyed by an image compression algorithm, but on the other hand it's personally identifiable information and therefore comes with additional legal restrictions in many jurisdictions.