We have a camera under the plate.Plate will be a ground for a bouncing ball. I want to calculate the point on the plate,that ball will fall on it. We can find x,y speeds and radius of a ball with opencv. But I don't understand how to find perpendicular speed of the ball since we see the ball in 2d. I can find the change of the radius in time. I thought I can drive an relationship between radius change and speed on z-axis but I couldn't. Any idea how can I do this? Thanks for answers.
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