pc_density — 3D `resolution` op

• Data kinds: points → table

• Call: import fullseye as fs; fs.ledger.pc_density(points, k=8) (to call the implementation directly, import meshres; meshres.pc_density(points, k=8); from the registry, ops3d.get("pc_density"))

Usage

Local spacing per point and the cloud's non-uniformity (`table`).

`spacing (N,) = distance to the *k*-th nearest neighbour; mean_nn`

(N,) = mean distance to the k neighbours; `stats` percentiles of both;

`nonuniformity = p95/p5 of spacing` (1 = uniform; a regular grid

gives exactly 1 and spacing = pitch·√k-shell); `surface_density` (N,) =

k / (π·spacing²) assuming a surface-like cloud.

Background guides (the physics and conventions behind this op)

• depth_sensors — 深度センサの知識 — 測距原理・実機の値・欠測の出方

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.

Runnable examples (verified samples that actually call this op)

• mesh_resolution_demo — py -3.11 examples_3d/mesh_resolution_demo.py

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

fuse_to_voxel · mesh_select_lod

Same category (`resolution`)

mesh_edge_stats · mesh_detail_map · mesh_split_long_edges · mesh_isotropic_remesh · mesh_sample_points · mesh_lod_chain · mesh_select_lod · mesh_reduction_report

*Provenance: meshres.py — 3D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

pc_density — 3D resolution op