Articles pages: (The articles are just for graphic editing software engineer to accumulate knowledge to design better software for the end customers. They are not well-organized.)
Related knowledge of photo editing software:
Simple Image Editor with Crop and Resize while Maintaining Aspect Ratio
Designer centric Wizard control
A better way to select images for your ImageList
ImageListBox - exposing localizable custom object collection as a property
An API for Google Image Search
DHTML Editor with Table Support and Source Editor
A simple C# Wave editor, part 1: Background and analysis
EXIF tag Editor for JPG images
An XML Schema Definition (XSD) Editor
ListView with Image on SubItems
Using and Developing an AutoSuggest ASP.NET Server Control Library