Image processing strongly depends on what image you wanna use. To find an "auto" approach, that works for every image is nearly impossible... I once wrote a bo

Image processing strongly depends on what image you wanna use. To find an "auto" approach, that works for every image is nearly impossible... I once wrote a bookscanner app in Java (https://boofcv.org https://boofcv.org), where everything was done automatically (preprocessing, object detection / book extraction, skin detection / finger removal, deskewing, line-slope-correction and so on). It was very difficult to adjust the parameters, that at least most of the books looked good.