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MNIST is a database of handwritten digits collected by Yann Lecun, a famous computer scientist, when he was working at AT&T-Bell Labs on the problem of automation of check readings for banks. The data set is a benchmark widely used in machine learning research. Due to its small size it is also widely used for educational purposes.s based on C++ but provides APIs for Python and Matlab.

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Artificially expanding the datasets through rotation of images in MNIST

The problem is that numbers are not invariant to rotations. For example, see what happens when you rotate a 4 in steps of 90 degrees: So unless your task includes recognizing numbers which are wr …
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