curve and color detection by python

I used a semantic segmentation algorithm that segments the road by using a deep learning algorithm. I need a method to use the output of this algorithm to extract the values of the segmented area at a specific location of the image. At the main time, I'm looking for a method to get the values of the segmented area and use that information to control a robot. The values that I'm looking for would represent the segmentation pixel value. for example, if the deep learning algorithm that I used to segment the road outputs a green mask on the road, I would like to check at a specific area if the mask is present or not. Secondly, I would like to check the curve angle or amount if present. An example of segmentation output is below, the red points represent the location where the method should check for the mask availability.
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