His work on wavelets is seminal and astonishing.

He has not stopped working, ever; with recent contributions to the detection of gravitational waves and the theory of quasicrystals.

I'm sad not to know him already.

And a very nice and approachable fellow. His class on signal processing was awesome.

Live presentation now: http://www.abelprisen.no/artikkel/vis.html?tid=69572

Does anyone know of a good introduction to wavelets?

Books or papers; let's say at the level of math heavy CS/undergrad math degree.

Depends on what you're trying to do with them since they have a few applications. This presentation is a rough but simple overview: http://cs.haifa.ac.il/hagit/courses/seminars/wavelets/Presen...

Here's an online demo for a C library that can do DWT and CWT. The code is a little rough but it's functional: http://rafat.github.io/#/sites/wavelib/front

Also, a really basic but easy to understand video series: https://www.youtube.com/watch?v=QX1-xGVFqmw

The classic is Ten Lectures on Wavelets by Ingrid Daubechies. If anyone can recommend a more recent book, I'd be interested too.

"A Wavelet Tour of Signal Processing" by Stephan Mallat is pretty good if you've got a background in signal processing at the undergrad EE level. Math heavy CS may require some recollection of linear algebra and numerical algorithms.

Ironically, was actually contemplating implementing wavelets approach in our project, so very timely!