feature request. Detect book pages about opennotescanner HOT 4 CLOSED

@billic , this one can be somewhat difficult, if the for outer corners are on a quadrilateral it should be easy to make a flag to cut in the middle and generate two files. But if the two pages are not aligned it can be hard.

One feature I want to do next after the stabilization is manual crop. This can include 2 pages division.

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@ctodobom Manual crop with 2 pages division will be great! Thank you!

Also there is some other difficult with books. Books paper are not flat and have an warps sometimes. Is it possible to detect it and unwarp (even with manual crop)?

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@billic , the whole magic is on deteting a polygon with 4 points (for the automatic detection), and then use the 4 point transform algorithm to take it out of the perspective. With curved pages, like the one of your book, there is not too much to be done. With manual crop, 6 points is not difficult, but curves are.

Just a remind that the first intent of the app is to quickly scan notes and drawings, and also small documents. I have "borrowed" the idea of Rocketbook Wave and there is a preformated page that helps on the detection, eliminating the need of the contrasting surface. I know that if you find something in a book you can use it, but I don't think you should use it to make a multipage document, the quality will not be near good as to a flatbed scanner device.

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not a bug. closing issue

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