Beginner looking to read a programming punchcard

Hello, complete beginner to computer vision. What courses, guides, etc. would you recommend for solving this task?:

* An image of a punch card is given on a black background
* To start I can assume the orientation of the card is always the same, with the cut corner always in the top left
* I need to go through each column, left to right, and determine which rows are punched or not punched. Can also assume only rows 0-9 …

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