Hello all, I tried to find tips how to "clean" a photo of the drawing but with no success. I have a photo of a paper with drawing (usually a combination of heavy lines by marker and thin pencil ones) and want to improve the image for printing. So I want to get white background of 100% of the image (no shadows) and still have all details of drawing kept. Even if they are sometimes lighter than shadows in different part of the image. For example a dark shadow in the cormer and light pencil line in the middle.
I tried to play with brightness & contrast. This is not good enough as many details are lost. Typically the pencil drawing. "Levels" are unusable for the same reason. I tried to look for edge-detection filters but they all do something else than I need: they left a thin line around the edge, not the original line itself. Probably a FFT (Fast Fourier Transformation) filter would help but I did not find any. Any ideas, please? Milan _______________________________________________ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user