[Gimp-user] map all colors that aren't already white/gray/black, to #808080?
Thank you Ofnuts! Worked like a charm! -- ottenm (via www.gimpusers.com/forums) ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
[Gimp-user] map all colors that aren't already white/gray/black, to #808080?
One way to do this is to remove the color to a separate layer, select it, and fill with whatever grey you like: Duplicate the image layer. On the duplicated layer, remove all color (Colors->Desaturate, or whatever). Set the layer mode of the duplicated layer to Difference. Since all black/grey/white pixels are desaturated already, the difference between the two layers will be zero, or black. If we now remove all black pixels, we are left with only the pixels that had been colored. Layer->NewFromVisible; make sure this new layer has an Alpha Channel (Layer-context-menu->AddAlphaChannel) (At this point, everything but the color should be black) In the new layer, Select the black (with a 0.0 threshhold, I imagine) and Edit->Clear. Now, all non-color will be transparent. Invert the selection (Select->Invert). Click on the foreground color, and make it whatever grey you like. Edit->FillWithFGColor, and the colored areas will now all be your favored grey. If you now only make visible (eyeball symbol on layers dock) this new layer (probably called Visible) and your original layer, you should now have what you wanted. (NOTE: I was testing this with merely grey/black/white areas/lines, and green/blue/red "paint"/"Airbrush" lines. It is possible that if a photo was used that some un-considered issue would arise that would also need to be addressed. I was assuming a largly black/white grey image, with a bit of color. If the image was largely colored, then of course the resultant image would be almost completely grey...) ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
Re: [Gimp-user] map all colors that aren't already white/gray/black, to #808080?
On 24/03/17 23:09, ottenm wrote: I think I got it all crammed into the subject line! I have some images with color spots in them that I would like to turn gray, but I want all the color spots replaced with the same shade of gray (not to darker/lighter shades of gray depending on how dark/light the original color was). Also want original whites, grays, and blacks left as is. I started using Color > Map > Color Exchange but the threshold is either missing too much or grabbing too much. Not sure how to select everything that isn't white, gray, or black. Hope that makes sense, apologies if it doesn't or if there's an obvious fix I'm missing due to genetics or disposition. Use the Color selection, but use the criterion selector '"Select by", at the bottom to select by Saturation. Click on one of your greys and this will select only the pixels that have a saturation of 0 (or very close to, depending on threshold)(in other words, the grays). Then invert the selection and bucket fill with grey. Caveat: likely due to round-off errors, the saturation value on black ad very dark grays is a bit erratic and some pixels may not be selected in the initial selection. ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
[Gimp-user] map all colors that aren't already white/gray/black, to #808080?
I think I got it all crammed into the subject line! I have some images with color spots in them that I would like to turn gray, but I want all the color spots replaced with the same shade of gray (not to darker/lighter shades of gray depending on how dark/light the original color was). Also want original whites, grays, and blacks left as is. I started using Color > Map > Color Exchange but the threshold is either missing too much or grabbing too much. Not sure how to select everything that isn't white, gray, or black. Hope that makes sense, apologies if it doesn't or if there's an obvious fix I'm missing due to genetics or disposition. -- ottenm (via www.gimpusers.com/forums) ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
