How do you calculate 3D, real-world speed in centimeters per second of the object in Binary Image?

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Shikhar Ghimire 2019-4-28

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https://ww2.mathworks.cn/matlabcentral/answers/458981-how-do-you-calculate-3d-real-world-speed-in-centimeters-per-second-of-the-object-in-binary-image

回答： Image Analyst 2019-4-28

I have already done all the basic image processing step to get the Binary Image and the bounding box for the objects. I have 10 set of images where the ball goes up and down. How do I calculate the real-world speed in centimeters per second of the ball from all set of image?Any tips?

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Answer 1

Image Analyst 2019-4-28

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https://ww2.mathworks.cn/matlabcentral/answers/458981-how-do-you-calculate-3d-real-world-speed-in-centimeters-per-second-of-the-object-in-binary-image#answer_372642

spatial_calibration_demo.m

You need to have some known distance in your scene that you can calibrate to. Then just multiply the distance in pixels by the calibration factor. See my attached demo.