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Help on detecting a a curve form

Hello Gurus,

I am hoping that the wise would guide the misguided here :).

I am trying to detect a curve of a certain shape and its position from a signal as shown below: image description. Due to noise and other variations, the curve may not be exact so I can not use simple number matching. I was wondering if there is something in OpenCV which I can use for this. Note that I will need to detect curves of different shapes and their position in the signal but if I know to detect one type, I can use the same method to detect other types.

Your help is appreciated. Thanks, Peter