Hardware
One to four webcams and a steady light
Sridu needs no special hardware. You need a steel-tip board, one to four USB cameras, even lighting and a computer with Chrome or Edge. Without cameras, you can enter scores by hand.
How many cameras?
- 1Works, but it only estimates the tip. Hidden tips land in the wrong field, and nearly every dart is flagged.
- 2Measure the tip just as precisely. Darts hidden behind others need a correction more often.
- 3The sweet spot, one every 120°. Clearly more robust with tight groups.
- 4See more of a tight group, one every 90°. Spread them over different USB ports.
Mounting and light
Most bad readings come from a moving camera or a pumping exposure, not from the detection.
- 720p is enough, and 1080p is better.
- 30–50 cm from the board, spread evenly, looking at the surface at an angle.
- The whole double ring in the picture, with a little room to spare, because darts stick out of the board.
- Mount firmly. If anything moves, recalibrate with one click.
- Autofocus and auto exposure off wherever you can. The app can lock them per camera in Chrome and Edge.
- Even light without hard shadows. A ring light is ideal.
- Little lens distortion is easier, but the calibration estimates and removes it.
Computer and browser
- Chrome or Edge are recommended. Camera controls such as exposure, focus and white balance only work there.
- https or localhost is required, because browsers only hand out cameras there.
- Four 720p streams can overload one USB port or hub. The camera page says which camera doesn’t start.
- Phone or tablet as a second screen: scan the QR code and follow the match live.
No cameras yet?
Enter scores by hand, or open demo mode. It simulates three 720p cameras with noise, shadows and a hand that pulls the darts.