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Scale invariance I'm working on a project that does a lot of bounding box detection. I'm able to detect the objects I'm

I would like to analyze a baseball batter's swing. I'm looking for ideas about how this could be achieved. For example, I could put different coloured stickers on the bat barrel, handle, the batter's helmet, feet, hands, hips etc. Then I suppose I could try to track the different coloured dots, perform some interpolation etc to track their positions. The information captured could be analyzed to help the hitter improve. Perhaps results could be compared to the "ideal" swing, etc.

I have little experience with computer vision or image processing so I'm looking for some initial advice. For starters is this even possible with OpenCV? What approach would be the best place to start, colour detection, object tracking? My initial experiments left me feeling that this would be quite difficult. I tried filtering for different colours in a video and I wasn't able to isolate a particular colour very well. For example, when trying to filter out everything but a red piece of paper, there were lots of other red artifacts in the output.

Anyhow, any help would be appreciated.