veil_chroma_limit — DRIVE `env` op

• Data kinds: any × scalar → scalar

• Call: import fullseye as fs; fs.ledger.veil_chroma_limit(color, luminance: 'float', tol: 'float' = 0.15) -> 'float' (to call the implementation directly, import driveenv; driveenv.veil_chroma_limit(color, luminance: 'float', tol: 'float' = 0.15) -> 'float'; from the registry, opsdrive.get("veil_chroma_limit"))

Usage

> This operator's description has not been translated yet. The original text follows as it is.

色 `color(RGB の比)で輝度 luminance` の灯火に白い光(光幕・霧の大気光)W を足したとき、色度の距離

|(c L + W·1)/|c L + W·1| − c/|c||(balltrack.ball_detect の chroma と同じ量)が `tol` に達する W* [cd/m²]。

距離は W に単調に増える(W → ∞ で灰色 (1,1,1)/√3 との距離に漸近)。漸近値が tol 以下なら `inf`(どれだけ白を足しても

色は読める)。二分法で相対 1e-12。使い道: 逆光の閾値 θ* = √(10 E_glare / W*)(Stiles–Holladay)、霧の中で色が読める距離

d* = ln(1 + W*/L_h)/β(灯火 c L e^{−βd} + 大気光 L_h (1 − e^{−βd}) の色度は c L + L_h (e^{βd} − 1)·1 と同じ)。

References (sample data, literature)

• 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.

Runnable examples (verified samples that actually call this op)

• poc_driving_weather — py -3.11 examples/poc_driving_weather.py

Ops the type connects to (they accept `scalar` as input)

spin_from_marker_sequence · carla_transform_matrix · carla_pose_to_world · carla_camera_pose · carla_xy_yaw · carla_scene_load · town_chain · osm_parse

Same category (`env`)

julian_day · sun_at · sun_events · sun_vector · sun_illuminance · koschmieder · mor_from_beta · beta_from_mor

*Provenance: driveenv.py — DRIVE operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

veil_chroma_limit — DRIVE env op