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:
Vector editors versus raster graphics editors
Features of Raster Graphics Editor
Specialized Vector graphics editor
A Cute Images Editor - Smart Graphic Kid
Devnet and Bitmap Images Versus Vector Graphics
An Editor for graphics and animationAVD
AVD Graphic Studio for multiframes files editing
SPX Graphic Editor VS Graphic Workshop Pro
Picasa for Mac; Better Than iPhoto?
High Quality Image Editing and Composing