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You’ll need a well-lit physical space and a spherical ball. Patience for computer vision jank is recommended. Any size sphere is supported with standard ball presets for: soccer, tennis, ping-pong, volleyball, cricket, baseball, golf, squash, water polo, kickball, and basketball.
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What's New in Silly Bells
1.2
September 8, 2026
Faster detection thanks to GitHub project StableHLO-CoreML! Early NMS has also been turned back off since it doesn't seem to help enough to justify the extra 30% latency. Finally, increased the detection threshold to decrease false positives.
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