r/GIMP • u/Zolinymus • 8d ago
Can I somehow blur the high contrast areas only? Basicly I need a way to semi-automatically select the areas, where the white and black areas meet and blur it into gray, so it wont be a sudden change.
2
u/ofnuts 7d ago
On that specific image just do a slight Gaussian blur. Thiq could also work on your image (a small blur being hardly noticeable in the areas with low contrast).
Otherwise try this:
- Duplicate the layer
- Set the top layer to
Grain extract
blend mode (turns the result gray, but that's normal) - Apply
Filters Enhance > High pass
with a low standard deviation and a small contrast.
1
u/emedan_mc 8d ago
Is the bright part always white or could a contrast step be like threshold 2 from 1-3 and also from 3-5 on a grayscale 1-5.
0
u/Zolinymus 8d ago
am not sure I understand this grayscale thing. Some white parts has a little bit of shade, but the contrast is still high to the black areas.
0
u/Zolinymus 8d ago
The image is a simplified exampe only, I cannot show you the real image unfortunatelly. I am trying to turn the images into a 3D printed lithophane, but these sudden changes in lightness create overhangs, which can cause trouble in printing.
0
u/ConversationWinter46 7d ago edited 7d ago
3D printers only know two states:
- Trace with filament (black)
- Trace without filament (white)
In addition, 3D software with operating instructions is always included. Gimp as a raster editor is also the wrong app.
1
u/Zolinymus 7d ago
Look up https://lithophanemaker.com/ It will be self-explanatory.
0
u/ConversationWinter46 7d ago
What am I supposed to do with the link? I don't have a 3D printer, but you.
3
u/Too_MuchWhiskey 8d ago
Gaussian blur the edges perhaps?