I have some low quality scans of book pages, saved as a PDF, that I would like to enhance. Since they're text only, and the text is kind of faint, I think that using the erode filter on each page would probably work pretty well (it has in the past). The problem is, it would be nice to be able to use the erode filter on all the pages at once and not have to do each one individually.

When you open a single PDF page in GIMP, AFAICT, it imports it as an image file rather than a PDF, but I don't know what type of image. I installed BIMP to see if I could do a batch erode that way, but it wasn't able to do it. Is GIMP the way to go here, or would something like ImageMagick (which I know very little about) be better for this?

cross-posted from: https://lemmy.world/post/13844882

I'm often using the Select by Color or Fuzzy Select tool. ¿Is there a quick way to increment the threshold with a keyboard shortcut, the mouse wheel, or similar?

Take the following example:

Given the image of the GIMP mascot, I want to select only certain portions, for instance the outer white part.

To do this I activate the Select by Color or the Fuzzy Select tool. Set the threshold to a starting value (let's say 15), then click on a white part at the edges of the image. But I'm not quite satisfied with the resulting selection: it selects most of the area I want but not enough of the greyish shadow below the chin. So I adjust the threshold to 50 and click again. Still not enough, set to 90 and lick again. A bit too much, set to 80 and click another. Almost there, set to 85 and click. Set to 83 and finally voilá.

That involved a lot of clicking and typing though. ¿Is there a quicker way to do this? Ide

https://github.com/Interpause/auto-sd-paint-ext

https://github.com/thndrbrrr/gimp-stable-boy

https://github.com/blueturtleai/gimp-stable-diffusion

“This new development version of GIMP is a bit of a game-changer as it arrives with some long-anticipated CMYK-related features. The way they are implemented will make some users happy, but some users might feel annoyed. It’s got to do with early binding vs late binding…”