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[Wilko]

I'm working on project in my university and i have a problem. The goal is to create algorithm that can track curves in plot images and create a lists of Point(x,y) with predefined accuracy/step that describes the curves. The number of curves on each image >=1 and width >=1 pixel. Curves may have multiple intersections and colors. They also can have the same color. The example of what i want to do: image

Dots are points that i need to extract. The scanning area must be picked by user(no axis or text in scaning area). I found some interesting here, but i don't feel that i'm strong in mathematics and i think it's overcomplicated for my purposes. I need something easier.