Given the outline that describes the edges of the S shape in OpenCV / Python, what methods can be used to trace the curve along the center of the shape?

Given the outline that marks the edge of the letter S (for example, in comics), how can I get a series of points along the spine of this letter so that I can later represent this shape using lines, a cubic spline, or another curve - a representative technique? I want to process and submit a form using 30-40 points in Python / OpenCV.

Morphological skeletonization can help with this, but surgery always seems to generate erroneous branches. Is there a better way to collapse the outline only in the shape of the letter S?

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