My first instinct is to compare this to OpenNoteScanner, the only other quasi-functioning FOSS note scanning app. The UI here is significantly more polished an

My first instinct is to compare this to OpenNoteScanner, the only other quasi-functioning FOSS note scanning app. The UI here is significantly more polished and better. The only thing OpenNoteScanner does better is that it starts in camera mode, and therefore the workflow is a bit faster. However, feature-wise this is seriously lacking. I would not consider using this until it can automatically crop and correct perspective distortion. Also the default filters are seriously lacking. Either make them smarter or give the user more control (e.g. for B/W allow setting the threshold, even for decently-lit documents I get poor results with random black areas) You can do both by integrating with OpenCV. No idea how easy it is to integrate it with flutter though... Anyways, good job! I'll keep following the project and might consider contributing if you ever start working on these features.