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
> Duplicate the layer and remove all the dark lines/text with the
> Dilate filter, repeat until they are all gone.
>
> Gaussian Blur this duplicated layer with a large radius.
>
> Effectively you want to subtract this duplicated layer from the
> original, do this by setting the layer Mode to Gr