It is required to write a program in Matlab or C++ OpenCV to calculate the grades of students given an image of their answer sheet. A sample image is attached below.
1 - The image might be scanned upside down.
2- All pencils are not the same. Some students mark the circle so lightly.
3 - Some students choose two answers at the same time. In this case, don't give them a mark for this certain question.
4- Your code should also be able to extract the student ID from the given image. For example, in our sample image, the ID is 02079.
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I have done optical recognition of things before so i have a very good idea of coding these things. I am teaching assistant in a course and have recently done such coding for my instructor.