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I tried the HoughCircle it works great! I just need to find the radius of the ball in each given video and that's pretty much it! THank you!

I see! I'll try that out, thanks!

That's the ultimate goal that I'm trying to figure out haha

Thanks for the tips! I'll check out the resources:) I think HoughCircles sometimes detect circles out of nowhere, right?

Thanks! I'll improve them before they are even useful for the public haha. Now it's just at working stage, but far from useful:)

I managed to track balls when there's a bright spot on the ball. See https://forums.azbilliards.com/threads/tracking-pool-balls-using-opencv.552749/ or

Thanks for the encouraging words! I'll try to improve the codes so that it recognizes regular balls without bright spots

I posted a question before about how I can track cue ball (or any ball) using some codes https://forums.azbilliards.com/threads/how-to-track-cue-ball-movement.552461/#post-7506743. Now I found a method in OpenCV that works pretty well for slow-mo videoes. Here are some demo clips I made...

Thank you!

Thanks!

Hi Bob, thanks for the info! Do you have the link to Shaw's high run thread you mentioned?

Does anyone know how to track the cue ball given a video file? I want something that looks like this: Appreciate in advance!

This discussion is simply brilliant! Thank you so much Bob and nataddrho:) I hope more keeps coming. I'll read the paper carefully to catch up haha

I believe this happens each time you put on a new cloth, Niels Feijen has a video about how to adjust the style of play when the conditions are slippery. Basically you use less English and more on the vertical spins.

Yes, I agree. But I think the 0.98 in the paper refers to the ball-rail COR (doesn't consider the ball sliding/dragging/rolling on the cloth). So I guess after all, it's still plausible to have .98 COR, interesting!

The highest is actually 91% on a slick table

In the end they say the COR of ball-rail impact is 0.98, which is a bit too high. But I could be wrong

Will a sliding CB into 1st cushion give better result than just use top+running english? Because after 2nd rail the CB will pick up running on it's own

I'm just curious about the physics that go into the common practice of putting running English on multi-rail kicks. I don't mean to dismiss PJ's diagrams and explanations. I love them all along! I just want to ask questions and get real knowledge both theoretically and practically.