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In football broadcasts, the offside graphic can make a tight call look precise, but the decision also depends on the exact moment the ball is played. That moment can be difficult to identify when a pass involves a deflection or several players moving close together.
How does a semi-automated offside system choose the relevant frame, and how much do officials still rely on a human review of the footage? I’m curious about how tracking data and video review work together when the point of contact isn’t visually obvious.
