OffsideFence - Real-time offside feedback for football forwards
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OffsideFence is a satirical sports-tech prototype that imagines real-time offside feedback for football forwards. It uses a plausible computer-vision pipeline—player detection, pitch mapping, tracking, defensive-line estimation, and haptic alerts—to ask where football should draw the line between analysis, assistance, and rule-breaking.

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How does the haptic alert actually work during play, since forwards can’t glance at a screen mid-sprint?
@ilan1072249 The alert is intentionally screenless. The idea is that the player should not have to look anywhere mid-sprint.
In the prototype framing, the wearable uses short haptic patterns rather than visual instructions: a light pulse means the forward is approaching the offside line, a stronger double pulse means they have crossed into a high-risk position. The player does not need to read data; they only feel a simple “hold / check your run” signal.
It is closer to a GPS watch vibration or a coaching cue than a dashboard. The important design constraint is that the feedback has to be binary, low-latency, and physically noticeable without becoming distracting.
Of course, that is also where the satire lives: once AI analysis becomes real-time physical feedback, the boundary between coaching, assistance, and rule-breaking gets much harder to define.