Prima.

Yeah, I do this:

magick "$file" -limit memory 1GiB -limit map 2GiB -threshold 60% -define connected-components:area-threshold=5 -define connected-components:mean-color=true -connected-components 8 output.png

It makes the scan 1-bit black and white. It mostly removes bright background images, if there are any on the pages. I think it works quite well for basic black and white documents, but color graphics and graphs aren’t preserved.

Its a hacked together shell script. I wanted to learn shell scripting, but I should’ve probably programmed it in python.

But it basically does this:

1. scan pages as png via scanimage in gray scale
2. convert the image into a high contrast b/w one with image magick
3. sort pages if I have to combine two scans (front and back side)
4. create a single pdf of all the document pages via image magick
5. move pdf to the paperless folder

I won’t share it because it’s really ugly and some of the functionality can be done with paperless native, like combining the pages of two scans. Which would’ve been easier.

No, I use a printer/scanner combo for scanning my files. I trigger a shell script via HomeAssistant which starts the scanner, cleans and fixes the order of the pages for two sided documents, and then puts them into the paperless folder.

But your idea is great!