Good walkthrough by Christian Zibreg, iDownloadBlog, on using Notes to scan and save documents.
I love this feature. And I find it interesting to think about edge detection at work here. Watch how the scanner detects the edges of a piece of paper laying on a table, automatically adjusts the scanning frame so you end up with a relatively rectangular result.
This object and edge detection is a hallmark of ARKit. Not certain that’s how this was done, but would not surprise me if it was.
Regarding ARKit, if they are using it at all, it must be a very stripped down subset. Document scanning works fine on my iPhone 6, but ARKit is not supported.
As for the scanning feature itself, it works really nicely as far as image processing goes. Pretty impressive. But I’m a little perplexed as to why they didn’t add OCR. Without the ability to make the text searchable, this has little practical use for me; I still either have to buy a third-party app or continue feeding documents through my ScanSnap on the Mac.