How to recognize a graph?

Question

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Good afternoon.
There are several dozen charts printed on graph paper. The task is to find the amplitude, frequency of oscillations and on some to find predetermined patterns. Tell me in which direction to look to automate the recognition of scanned charts? I can only write in python.

Answer 1

As for the open menu
, your logic is set incorrectly.
Because the Menu is closed, and when It is open, simply add it, correct it for good :)
class="active"

Answer 2

If the graph is clearly visible on the millimeter, then OpenCV

Answer 3

Yes, it will take a really long time to figure it out. You can write a whole scientific work. Thanks to all.