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On Tue, Aug 9, 2011 at 3:53 PM, Dirk Laurie wrote:

> What Lua libraries exist that can convert an image from one
> of the commonly used formats to an array of pixels, with
> elements [r,g,b] or [c,m,y,k], and back from that array
> to the same image format?

I've never used it, but I think LuaGD might do what you want:

 - Jeff