Court Keypoint Tool

Generate and verify the 12-point K-order court keypoints a camera needs for PadelClips processing.

Internal

Court view

court outline service + center lines net line keypoint

Load the sample frame or upload a court frame, then place the 4 corners.

Controls

Generate from 4 corners

Check existing 12

Frame

Place the 4 court corners (click the canvas in this order, or type):

1. near baseline L

2. near baseline R

3. far baseline L

4. far baseline R

Court model (standard padel defaults)

length m width m service from baseline m net ratio

Presets

court-4-rise (pdleye) test-1821

Output

court_keypoints (JSON, ready to register)

Points

#	x	y	location

Data received from pdleye

court-4-rise (1920x1080, net_ratio 0.5) returned by Konstantin. Validated against the known-good 1821 camera: corners exact, net and far-service tight, near-service offset by lens distortion (same fingerprint as our reference camera). Load it above to draw it on that court's frame once you have one.

Homography is a plane-to-plane fit from the 4 court corners to a real 20m x 10m padel court; the net, service lines and center line are projected in perspective. A single 4-corner fit cannot fully model wide-angle lens distortion, so the near service line (closest to the camera) is the one to eyeball against the painted line after generating. K-order: 0-1 near baseline, 2-3-4 near service, 5-6 net, 7-8-9 far service, 10-11 far baseline.