I stumbled across this site via [1], and went on to read [2]. I was about to submit one of those to HN, when I realized the entire site was full of gems.
Yeah, blast from the past. Early days of the web. The image interpolation/extrapolation blew me away, particularly extrapolating away from a blurred image as a way to sharpen.
[1] http://graficaobscura.com/matrix/index.html
[2] http://graficaobscura.com/interp/index.html