Three-Shear Image Rotation...

Nick Berry has the best explication of three-shear image rotation I've ever seen – something any programmer could understand...

Awesome Imagery...

Sonar has come a long, long way since the primitive gear I worked with in the Navy some 40 years ago.  Back then, state of the art was detecting the existence of a submarine, or the depth of the water under the ship.  These days, side-scanning synthetic-aperture sonars take “pictures” that look like sharply focused old-fashioned black-and-white photos:

This shows the stern of the Titanic (at left) and many piece of debris from the ship after in broke in two on the way down.  It's not a simple sonar image, but rather a composite painstakingly made using a combination of sonar imagery and underwater photography.  I like the relief provided by the shadows; it makes the image “pop” almost as though it were 3D.

Much more here...

RAW Image File Processing – in JavaScript

Nothing special about this package that I can see except for the fact that it's running in your browser.  Despite the fact that I've been working with web apps for over 10 years now, I'm still blown away that they can do compute-intensive things like image processing and cryptography, in an interpreted language like JavaScript...

Tycho's Central Peak...

Tycho is a large, relatively young crater on Earth's moon, easily spotted with the naked eye (see photo with red location dot at right).  Tycho has a prominent set of central peaks (as seen in the photo at far right) that can be seen even with binoculars. 

APOD is featuring a photo of those central peaks today, taken a year and a half ago by the Lunar Reconnaissance Orbiter (LRO) – another one of NASA's largely unsung scientific robotic exploration heroes.  Even better, APOD links to this interactive high-resolution photo viewer, which shows the same photo in spectacular 1.5 meter per pixel resolution.  Awesome!

The Dead Sea Scrolls...

They're all online now.  Awesome.

Image Restoration...

A very nice article by Vladimir Yuzhikov about restoring images that are out of focus or blurred through motion, including the underlying mathematics.