I wonder if there is any library that is capable of processing a scanned image of a response form (similar to that used in the ENEM). I have already found software that is able to do this, which is the KaptureAll , but I wonder if there is an open source solution that does something similar.
If it does not exist, how best to do it, which libraries would you recommend?
The best way to do this is to go after an OCR (Optical Character Recognition) library. Here's a great article on this .
There is also Tesseract, an OCR engine that is not native to .NET, but there is an enveloping for .NET .
Or, still, you can try a paid solution .
There is an OpenCV library, which is open source and in C ++ (if I'm not mistaken), but I've never used it, just heard!
Here's a tutorial with C # that I found on google OpenCV
See if you help xD
