I ran noteshrink in order to get a farewell notebook put together for a colleague with handwritten notes sent in via scan/photo soon after the lockdown started.
you need somewhat decent scans to get this working (but when it works it works amazingly well!) - photographs of a piece of paper are very finicky to get correctly detected - it would often remove other relevant parts or keep too much in... I think with a live preview it would have made my life of working with a broad range of scan methods/lighting/consistency easier... but it's volunteer work and not "live preview" fast computationally, so I wouldn't call it a complaint.
you need somewhat decent scans to get this working (but when it works it works amazingly well!) - photographs of a piece of paper are very finicky to get correctly detected - it would often remove other relevant parts or keep too much in... I think with a live preview it would have made my life of working with a broad range of scan methods/lighting/consistency easier... but it's volunteer work and not "live preview" fast computationally, so I wouldn't call it a complaint.