Resources
Specific Techniques for using media in responsive design such as images, or video
-
Client side Javascript requests image at a specific size which is resized by GD library -
Techniques for RWD background images and work-arounds for limited CSS background-size support. -
Javascript is used to create a cookie which server side php uses to server different resolution images -
Filament group's adaptive image solution uses JS on the client & server side code -
This free service allows easy server side image replacement.