Optical flow based Obstacle Avoidance

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I have edited my question . @Tetragramm

So what's the problem? Can you run optical flow? Can you tell which side of the image is left and which is right? Can you tell how large the flow is for a given point? That's all you need.

The first is really the only one that's an OpenCV problem, and there are lots of tutorials for Optical Flow. As I said, if you have a problem with a specific function not working the way you thought it should or the documentation not being clear, we can help, but we can't do your work for you.

I can compute the optical flow but how can i tell right from left image? Or do you mean if the result is positive or negative ?

@Tetragramm welcome to downvoted answers clup :)

Do you understand why you're looking for larger optical flow vectors? When I said left/right, I mean literally the left half of the image, and the right half of the image.

Yes i can understand that larger optical flow equals closer distance from object. But do i simply have to divide the width of the camera view(e.g. 480pixels) by 2 ?

That would certainly split the image left/right.

Look, we can do how, and occasionally what. But you have to figure out why, and most of the what. So, when you have actual questions, then come back and ask them. For now you need to figure out the what and why and as much of the how as you can of your project.