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I am making a Robot goalie, the robot is supposed to detect whether a ball has been thrown in its direction , sense the direction of the ball and then stop it from entering the goal post. A webcam will be mounted on top of the goal post. The robot is required to only move horizontally (left or right), it shouldn't move forwards or backwards. The robot will have wheels, the image processing will be performed by raspberry pi which will then send the required information to a micro controller which will be responsible for moving the robot in the required direction(using servo motors). Which image processing algorithm will be the best to implement this scenario?

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  • $\begingroup$ Will the ball and posts and field be standard and uniform colors? $\endgroup$ – Ben Oct 6 '15 at 17:48
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Ball detection using vision is not extremely difficult, especially if the ball is easy to recognize. There are a lot of tutorials and blogs which give a detailed explanation on how to implement an algorithm to solve this problem:

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