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Detecting the volleyball net

What would be your approach to detecting the volleyball net on this images.
I am a struggling with coming up with a decent solution.
Unfortunately, bilateralFilter or gaussianBlur all result in a lot of noise (especially the trees and sand) for the canny line detector.

Can you suggest a better course of action ? Any ideas will be appreciated. Specifically, how to filter out sand and trees.

P.S. Also tried inRange based on hue, but the net and the human skin fall within the range of the sand.


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