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#X text 318 477 set all "grey" pixels (the transients) to white.;
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#X text 505 110 an alternative colour-curve;
#X text 228 56 paint your own curve;
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#X text 78 47 just multiply the pix-buffer with 1 (do nothing !) \,
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#X text 56 272 maybe this could be done more easily..?;
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