I can't seem to find the link now, but there was a post here a couple of weeks back about someone doing a very similar thing (in Python, IIRC) to clean up pictures of handwritten notes. It seemed conceptually simple, and worked quite nicely.

I know the one you mean, this classic one was linked from it: https://mzucker.github.io/2016/09/20/noteshrink.html

That's the one, indeed. Thanks!

Nice! It could be used before feeding a OCR

Wonder how close this is to the techniques apps like Office Lens use. I am always amazed to the extreme angles I can take a photo and the app still makes it end up as perfect pdf.

Check out how Dropbox does it: https://blogs.dropbox.com/tech/2016/08/fast-and-accurate-doc...

Thanks. Exactly what I was searching for.

> https://officelens.uservoice.com/forums/289714-office-lens-u...

It seems Office Lens depends on the online servers and doesn't do anything offline.

I still prefer offline solutions, especially open-source ones.

Sure. This wasn’t an advocacy for any tool. I suppose most tools use similar tricks and was wondering if it was anything like the one presented here.