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I'm looking for a simple and free application which can automatically scan a document (in the form of a JPG or PNG), change the perspective to remove skew, and then crop it.
It would be nice if the application also was able to scan documents directly from the webcam, but this is not required.
On iPhones, this could easily be done with an app called Microsoft Office Lens, but it's only for iOS and not Mac. The "scan document" feature in Notes is also able do this, but again it only works w/ iOS.
You can do the job on just about any platform using python and opencv - python should already be installed on your mac.
A very nice write up on how to do this is available in the pyimagesearch blog here.
The linked example, which includes quite a bit of additional code & comments to show the intermediate steps, uses just 75 lines of python to:
You will need to add a couple of lines to generate a new filename & save the image.
