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13
votes
2answers
2k views

How does the Curves tool work in GIMP?

I started using GIMP recently, and came across an option called Curves under the Colors menu. What does this tool do, and how do I use it correctly? I get some good colors if I make a graph in 'S' ...
4
votes
2answers
1k views

What is a “Slanted S” in a curves layer?

I am trying to do a Photoshop tutorial, seems easy, but I can't understand one phrase: `First, I add a curves layer and create a slanted S. What does slanted S mean? Maybe I should "write" S in curves ...
9
votes
2answers
343 views

How levels and curves tools are related?

I started to use levels and curves tools quite recently and now I mostly use the second one. Mostly this is due to the fact that I understand the underlied mathematics of curves better than levels. My ...
8
votes
1answer
2k views

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 ...