Yep -- superb work and it makes it much more concrete. I was (maybe quite unusually for a CS degree at the time) taught about JPEG compression in 94/95; I've c

Yep -- superb work and it makes it much more concrete. I was (maybe quite unusually for a CS degree at the time) taught about JPEG compression in 94/95; I've carried a sort of bare-minimum working knowledge of how it works along with me through web development and semi-pro photography, and it can be quite useful knowledge (e.g. when optimising "retina" images for the web). But I'd have loved an interactive tool like this at the time, because it is not the easiest thing to absorb.