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Is the C ++ OpenCV Vision Library suitable for this case of image segmentation?

I am trying to find an easy to use vision library for C ++. Here is my situation: I have a camera connected to a computer (for simplicity, however, we can simply assume that the image files exist on the computer), and that is how the images will look:

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The idea is that three objects vertically stacked will have very contrasting colors. I need to determine the location of objects, so the vision library must either find the edges of objects, or determine their center of mass.

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