Any one has code by python about how i can do filter to picture ?

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Anoop A Nair

If you're looking to identify the regions of a specific colour then you can do colour identification via image processing using OpenCV.

https://www.pyimagesearch.com/2014/08/04/opencv-python-color-detection/

If your aim is to filter images eg: edge detection, blurring. etc , you can use morphology transforms in OpenCV python:

https://docs.opencv.org/master/d9/d61/tutorial_py_morphological_ops.html