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Correct A Math Test with Deep Learning - Part I

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100-Masu 100-Masu (or 100-Math) is a popular math test for primary school student in Japan. It's just only a combination of one digit addition, multiplication, and division in 100 squares table.


As you can see, the math test has a table that include 100 cells where students write their answers. Any cell that is left empty or with a wrong answer is to be counted towards the total number of mistakes and the tally is marked on the test sheet. The important in practicing 100-math calculations test is also in Prof. Hideo Kageyama's book: To do everydayRecording everyday With about 30 students in class, the teacher must spent so much time everyday to manually correct these tests. So it's worth to implement a automatically correction.
The Approach Our target is building a mobile app that can capture test sheet image, identify the multipliers in each table, identify the numbers written in the answer cells, compare against the expected answers, and mark the total number of mistakes …