How to implement old film effect?

I'd like to implement an old film effect on pictures. Does anyone know a library or even the rare maths involved? I'd like it to cope with red shift for over-exposition and the rest. Even if you don't know the maths or a library, a pointer to any technical doc will be appreciated.

Clarification: I need to write these routines for a project of my own. I'd like to know what kind of processing has to be done and how. Doesn't matter the environment and system, I just need some hint on how process开发者_JAVA百科 RGB data

You mention Magic Bullet from Red Giant Software in your comments. There's an impressive amount of image processing know-how behind the development of Magic Bullet. You'd probably have an easier time implementing a host interface for After Effects or Final Cut Pro plug-ins and using Magic Bullet.

If you want to see some source code in action, examine the open source projects that do image processing like GIMP, CinePaint, FreeFrame, etc.

You could try with as3 bitmapdata noise function http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/flash/display/BitmapData.html#noise%28%29

If you can find a plugin for Paint.Net, I'm sure you could just use that dll in your program. Is this the sort of thing you're looking for?

Rare maths?

Create several different transparent PNGs with scratch and dust marks on it. Take a pic, adjust the hue, saturation and brightness (algorithms for this aren't that complex) to fade out the pic, then overlay one to many of the scratchy PNGs. The more scratch/dust PNGs you have, the more random the effect you can create.

Not much math here IMHO.