SAIRCA Race

SAIRCA

idle 0:00

Race linking single racer

SINGLE RACER

LINK RACERS

Single Racer: just your phone. Link Racers: each phone shows Your link #. Whoever's number is typed by another racer becomes the Finish Line host (full race controls); everyone else joins as a camera/checkpoint slot. One link supports up to 10 devices; cameras are assigned in join order: 1st = Finish Line, 2nd = Halfway, 3rd–10th = Turn 1–8. Returning to Single Racer ends the link. Each phone needs the SAI PIN.

My ArUco tags —

Claim one club tag (11+) after sign-in. Download a print-ready PDF sheet (up to 20 markers per export). Tags 1–10 stay with the race director unless opened for self-registration.

Select checkboxes (max 20), then download.

Tag registry (admin) reserved 1–10

	ID	Status	Owner	Pool

Tap "Start camera" to begin tracking. The phone needs HTTPS (Tailscale) for the camera.

Camera — resolution, FPS & hardware

Resolution and FPS apply the next time you Start camera. Exposure, white balance, zoom, and focus apply while the stream runs when the driver exposes them (phones vary; USB webcams often expose more).

Camera List fills after first camera start (labels need permission). Restart camera after changing. Facing Requires camera restart Resolution Native path when supported (resizeMode); browser may still cap Target FPS Browser may cap lower Auto-tune Off by default. When on: widest zoom + continuous AE/WB + focus sharpen+lock on Start camera only (not color calibration). Exposure Live when supported EV comp. Exposure compensation (driver) Brightness Image brightness (rare on phones) White balance Live when supported Focus Try Re-focus after changing scene Focus dist. Manual focus only Zoom Optical / digital zoom Torch Rear LED if the device reports torch Lock Locks every row in this panel (capture + hardware). While locked, live applyConstraints and the 900 ms focus warm-up re-read are skipped. Uncheck to edit again. Stop camera clears all choices and unlocks.

Actions

Apply re-sends all live rows; Re-focus runs AF then locks.

MODE FORMAT Lap mode ends per car at target laps. Timed mode keeps racing past 0:00; rank is by total laps when stopped. LAPS 1–50 AIRHORN Airhorn at countdown 0 uses full in-browser gain (not capped for “safe listening”). Raise phone media volume if it sounds quiet — spoken “3…2…1” used to duck the horn on some browsers; we cancel speech before the blast. ANNOUNCEMENTS SAI speaks "Buggy: first place" etc. as cars cross the finish (phone plays via WebSocket when the race is running). FINISH LINE defaults to centre of every camera; tap to move USE ArUco When ON, register cars with T<id>; camera scans only those tag ids. When OFF, cars are color-only and you type just a number / bib. USE BEAM When ON, the break-beam credits laps. When OFF, only the finish line crossings count. TRACK BOXES Overlay smoothed motion rectangles on your preview (this phone only). Server must run with SAIRCA_MOTION_TRACK_BOXES=1 or boxes stay empty. Lock race Freezes every control in Race + Cars & tags on this phone: mode, format, laps/timed, announcer/airhorn, finish-line picker, USE ArUco (tag pipeline), USE BEAM, track boxes, station detect, add/calibrate/remove cars. WebSocket snapshot sync will not overwrite those fields. Stop camera clears this lock and resets all of them to defaults (local preferences cleared).

Cars & tags — 0 registered

Tag / slot field: type T plus the ArUco marker number if the car has a printed tag (example: T5 for marker id 5). Type digits only if there is no tag on the car — that is a color-only roster slot; you must calibrate that row so SAIRCA can match paint. T5 and 5 are different cars (tag id 5 vs. slot 5). Tagged mode: print ArUco DICT_4X4_1000 tags (the Racing Tags/ folder ships IDs 1–10) and stick Tagged cars: center the car with its ArUco tag visible, tap calibrate once — SAIRCA stores a tag + body color snapshot from that frame (same capture as tagless). Motion assist stays off until then. Tagless mode: tap calibrate while the car fills the center of the frame — SAIRCA samples that view, builds the color profile, and sets the car’s chip color automatically (no manual color picker). Live video does not auto-calibrate.

Race board no event

Event Class Run —

Live Race Board

Live timing

Race order

Drag classes to set run order (Buggy → Short Course → …)

Upcoming Race

Leaderboard History

Race day readiness

Calibration & detection diagnostics ●

Updates while the camera is on. brightness < 40 = too dark for ArUco; focus < 100 = blurry; 0 motion blobs with the car visible = bg subtractor warming up (give it ~5s) or the car is identical to the background. color rejected means the histogram diverged past COLOR_MATCH_MAX — recalibrate the car under the same lighting.

Race replays 0

Recording auto-starts on Start Race and stops on Stop / Reset. Each replay keeps the MP4 plus a per-frame detections.jsonl so SAIRCA can re-watch the run later to learn from missed detections. Last 20 races kept.