I have picture on creasy paper. I need to have just drawing without brown paper that contains shades of paper folds. What strategy I can apply in this case. I know I can use quick selection toll and select each detail , but I think there should be more smart way by cutting out brown color with all folds. But how to achieve it?
Increase the saturation of the red and green, and decrease it on yellow (brown). Then make a new layer with a bright color, for example bright blue 0, 0, 255. put the blue layer on the bottom, your original photolayer on top with blendingmode "saturation"
You should now see a gray background and your drawing in bright blue
Not shure I have it.
Then edit colors again, increase the brightness of blue and reduce that of green and red.
Where I can set brightness of selected colors? Image->adjustment->Brightness/Contrast not have selection according to colors.