Compressing and enhancing hand-written notes (2016)
mzucker.github.io
Compressing and enhancing hand-written notes (2016)
1–10 of 78 posts
Re: Compressing and enhancing hand-written notes (2016)
#2Looks interesting. Normally when I'm "cleaning" up scans I use unpaper, but although there is some overlap in functionality it doesn't do the same.
Anyway very nice writeup and I will add it to my arsenal and give it a closer look later. Could be useful for my document archive+ocr solution.
Edit: too bad seems like it didn't see any activity in the last year
Re: Compressing and enhancing hand-written notes (2016)
#3Nice to see a bit of k-means clustering. I was worried that this might attempt to be "smart" by converting to symbols, replicating the "Xerox changes numbers in copied documents" bug, but it's pure pixel image processing.
Very clean results. In some ways it's a smarter version of the "posterize" feature.
Re: Compressing and enhancing hand-written notes (2016)
#4Looks interesting. Normally when I'm "cleaning" up scans I use unpaper, but although there is some overlap in functionality it doesn't do the same. Anyway very nice writeup and I will add it to my arsenal and give it a closer look later. Could be useful for my document archive+ocr solution. Edit: too bad seems like it didn't see any activity in the last year
> Edit: too bad seems like it didn't see any activity in the last year
That's not necessarily bad: sometimes a piece of software can be done, or nearly so.
Re: Compressing and enhancing hand-written notes (2016)
#5I wonder if it might improve by using a better color space than HSV. Maybe CieLAB?
Re: Compressing and enhancing hand-written notes (2016)
#6I wonder if it might improve by using a better color space than HSV. Maybe CieLAB?
Is there much room for improvement? Looks pretty good to me.
It seems to me that the inaccuracies/inefficiencies/errors/whatever you like in using RGB are basically truncated out of existence by the very, very harsh binning that is occurring. I wouldn't expect any visible differences to emerge from any alternate color space.
Re: Compressing and enhancing hand-written notes (2016)
#7This reminds me of my time in university, when I saved all my lecture notes as DjVu [1] files.
It's a great file format for space-efficient archiving of scans like that, with a bit of scripted preprocessing.
Re: Compressing and enhancing hand-written notes (2016)
#8Looks interesting. Normally when I'm "cleaning" up scans I use unpaper, but although there is some overlap in functionality it doesn't do the same. Anyway very nice writeup and I will add it to my arsenal and give it a closer look later. Could be useful for my document archive+ocr solution. Edit: too bad seems like it didn't see any activity in the last year
> Edit: too bad seems like it didn't see any activity in the last year That's not necessarily bad: sometimes a piece of software can be done, or nearly so.
Yup but a project like this would have an empty issue tracker this one not so much ;)
(which doesn't mean that it's a bad project or that I wont use it. it means that I will probably start to work on it)
Re: Compressing and enhancing hand-written notes (2016)
#9The Image Capture app on macOS is surprisingly good at this, and one of the things I really miss on Linux and Windows, so this is neat to have.
It’s also interesting for me to think about how this is a generalization of converting a scan to black and white for clarity :)
Re: Compressing and enhancing hand-written notes (2016)
#10Can be incrementally improved by using a more human-focused color model than HSV, like CIECAM02 or CIELAB.