Nidelva river through Trondheim Norway

Nidelva river through Trondheim Norway
by Saaru Lindestokke                

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UFRaw is a utility to read and manipulate raw images from digital cameras. It can be used on its own or as a Gimp plug-in.

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In ufraw, how to use the two curves?

I have a basic understanding of curves. That is, I know the mathematical concept behind them, and I have an idea what happens when I change them. But this knowledge came from sources which assumed ...