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:
- scan pages as png via scanimage in gray scale
- convert the image into a high contrast b/w one with image magick
- sort pages if I have to combine two scans (front and back side)
- create a single pdf of all the document pages via image magick
- 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.
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.pngIt 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.