presented by Persistent Visions ®
compiled by Dru Abrams

Testing Interpolator Quality - Explains why you never want to rotate imagery in photoshop. Link below is root of this site. Very interesting stuff for those interested in image editing theory.

Panorama Tools - Home site of the above link. Truly excllent and interesting digital math theory.

Lens Distortion Removal

Repeating Texture: The power of the high pass - High pass technique alllows you to "even" out the lighting on a would be repeating texture. Removes contrast variation at macro level, while retaining micro contrast/detail.