Image Filtering

Does anybody know of a php (or .net) library to process images similar to that of the iPhone App Instagram

Example:

Filters such as black and white and sepia are pretty basic but the filters demonstrated in that app are much broader and offer a lot more.

Thanks in advance

The ImageMagick extension has quite a few effects/filters built in to it.

Excellent, I shall have a look

Thank you

If a command-line program is adequate, you could look at G'MIC. It's also available as a GIMP plugin.