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Hai, Is it possible to detect edges from particular area of image(For example , if a select the particular area from the image using Rectangular box, I need to find the edges of the objects that are covered by rectangular box). If so how to do that using OpenCV and C++ or python ? Please provide me steps I need to follow.

Hai, Is it possible to detect edges from particular area of image(For example , if a select the particular area from the image using Rectangular box, I need to find the edges of the objects that are covered by rectangular box). If so how to do that using OpenCV and C++ or python ? Please provide me steps I need to follow.