Image processing?

[Antaeus Feldspar]

I'd like to be able to access image data in some of the common lossless
formats, like BMP and PNG, and if possible also write output in these
formats.  Even having one of these formats available should help, since
I can use GIMP for conversion where it's needed.

Note, I'm not looking for anything really advanced like seeing the image
in real-time as it's manipulated; I just want to be able to
programmatically get data like "the (r,g,b) value of the pixel at
(10,10)" and the like, and as I said, being able to output to this
format would also be nifty.  Before I go reinventing the wheel, does
anyone know of existing code for this purpose?

	-jc
	feldspar at cryogen.com