crossing op• Data kinds: none → any (an op determined by its arguments alone — it takes no image or data input)
• Call: import fullseye as fs; fs.ledger.crossing_lamp_signal(t, *, t_on: 'float', t_off: 'float', flash_per_min: 'float' = 50.0, duty: 'float' = 0.5, exposure: 'float' = 0.0) -> 'np.ndarray' (to call the implementation directly, import drivecrossing; drivecrossing.crossing_lamp_signal(t, *, t_on: 'float', t_off: 'float', flash_per_min: 'float' = 50.0, duty: 'float' = 0.5, exposure: 'float' = 0.0) -> 'np.ndarray'; from the registry, opsdrive.get("crossing_lamp_signal"))
Returns the brightness (0..1) of the 2 red flashing lamps at times t (array): shape (n, 2), column 0 = left, column 1 = right.
> The detailed description below is the original text — the summary and the headings are translated.
1 灯の周期 P = 60 / flash_per_min、点灯 duty·P。右の灯は P/2 遅れ(解釈基準「交互に点滅」)。点くのは [t_on, t_off)。exposure > 0 ならカメラの露光 [t, t + exposure] の平均(点灯時間の原始関数で閉形式)。
• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).
• Operator provenance and references — the sources of the research/methods this op family came from.
• The canonical algorithm (author, year) and its uses are named in the family usage guide above.
• poc_driving_crossing — py -3.11 examples/poc_driving_crossing.py
any as input)course_crank · course_s_curve · course_turnaround · course_slope · course_intersection · course_parallel_parking · course_crossing · course_road
crossing)crossing_timing_check · crossing_gate_state · lamp_pair_phase · crossing_clear_time · exit_room_check · crossing_stop_check · track_sight_distance · sight_triangle_distance
*Provenance: drivecrossing.py — DRIVE operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.