material_params — DRIVE terrain op

• Data kinds: none → table (an op determined by its arguments alone — it takes no image or data input)

• Call: import fullseye as fs; fs.ledger.material_params(seed: 'int' = 0, grain: 'float' = 0.05, puddle_level: 'float' = 0.55, puddle_freq: 'float' = 0.6, stain_level: 'float' = 0.6, stain_freq: 'float' = 0.9, wear: 'float' = 0.6, wear_freq: 'float' = 2.0, grass_var: 'float' = 0.1, sky=(0.62, 0.75, 0.92)) -> 'dict' (to call the implementation directly, import driveterrain; driveterrain.material_params(seed: 'int' = 0, grain: 'float' = 0.05, puddle_level: 'float' = 0.55, puddle_freq: 'float' = 0.6, stain_level: 'float' = 0.6, stain_freq: 'float' = 0.9, wear: 'float' = 0.6, wear_freq: 'float' = 2.0, grass_var: 'float' = 0.1, sky=(0.62, 0.75, 0.92)) -> 'dict'; from the registry, opsdrive.get("material_params"))

Usage

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

材質の表。puddle = Perlin(puddle_freq) > puddle_level の所(道の内側だけ、ラベル 11、色 = 写り込み refl·空 + (1−refl)·陰影つきの路面)、

stain = 同様に暗い染み(ラベルは道のまま、真値の場 "stain" に残る)、wear = 白線の摩耗率 clip(wear·(Perlin(wear_freq)·0.5+0.5)·2, 0, 1)。

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_world_terrain — py -3.11 examples/poc_world_terrain.py

Ops the type connects to (they accept table as input)

course_layout · course_occupancy · course_contains · world_build · world_camera · world_move · lidar_scan · rss_longitudinal_same

Same category (terrain)

perlin2 · fbm_params · fbm_height · fbm_gradient · radial_periodogram · spectral_slope · course_distance · terrain_params

*Provenance: driveterrain.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.