spectral_slope — DRIVE terrain op

• Data kinds: image2d → table

• Call: import fullseye as fs; fs.ledger.spectral_slope(field, dx: 'float', f_lo: 'float', f_hi: 'float', n_bins: 'int' = 48) -> 'dict' (to call the implementation directly, import driveterrain; driveterrain.spectral_slope(field, dx: 'float', f_lo: 'float', f_hi: 'float', n_bins: 'int' = 48) -> 'dict'; from the registry, opsdrive.get("spectral_slope"))

Usage

Straight-line log–log fit of the radial periodogram: {"beta", "intercept", "n"} (power ∝ f^{−beta}).

> The detailed description below is the original text — the summary and the headings are translated.

定理: fBm 面(H)なら β = 2H + 2(Saupe 1988)。

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 · course_distance · terrain_params · terrain_height

*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.