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If I have an RGB image and a binary mask (1 channel), and I want to create contours for the RGB image based on the connected pixels of the binary mask. After that I want to compare the pixel values (e.g. check if each pixel in the contours is having a blue value > 150), then how can I implement the above by using OpenCV?
Thanks a lot!
Assuming the images are the same size and shape then simply scan over the pixels in the binary image looking for the contours and check the pixel values at the same row/col in the color image
See Fastest way to extract individual pixel data? for details