3 ms·

The lack of full data is because tournaments keep Hawk-Eye (https://en.wikipedia.org/wiki/Hawk-Eye https://en.wikipedia.org/wiki/Hawk-Eye) data to themselves ri

• gretch 6y ago
  Hmm from the look of it, it's not clear Hawk eye does everything. Certainly it does pace. But from the article it's hard to say if it would track spin - it's not clear to me that with the natural markings on the ball (seam lines + ballmaker logo) and the lighting that exists in the stadium, that would be enough fidelity for some algorithm to calculate the spin. I think Hawkeye could be updated to easily do it though, and maybe if they would be willing to draw 1 or 2 black dot markers on the ball in addition to the natural markings.
  • ddek 6y ago
    It does track spin, they often show stats measuring rpm. Additionally spin is a big part of the trajectory model - the Hawkeye cameras are only 60fps, so the trajectory is interpolated. However, I doubt it’s the cameras measuring spin. It’s more likely spin is a free variable when they fit the trajectory.
    • glaberficken 6y ago
      Found this: https://commons.nmu.edu/cgi/viewcontent.cgi?article=1746&context=isbs https://commons.nmu.edu/cgi/viewcontent.cgi?article=1746&con... Very interesting read, but I'm not knowledgeable enough to really give you an accurate tldr, sorry
• kebman 6y ago
  There is some moonwalking to be seen. I wonder how easy it is to get an neural network to remove that.