tb_estimate_oriented_normals — 2D `typed` op

• Data kinds: points → points

• Call: fullseye.apply(img, "tb_estimate_oriented_normals", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])

Usage

A combination of PCA normal estimation and Hoppe global orientation propagation. → (N,3) oriented unit normals.

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

:func:estimate_normals(向き未定)→ :func:orient_normals(MST 伝播)を通す。

閉曲面なら全点外向き、平面なら全点同一半球にそろう。得た法線を

`curvature3d.shape_index` に渡すと凹/凸符号が正しく出る。

Args:

points: (N,3) の点群。

k: PCA 近傍数と kNN グラフ近傍数(共通)。

seed_dir: 大域基準向き (3,)。None なら重心から外向き。

Returns:

(N,3) の大域一貫・向き付き単位法線。

2-D 進化レジストリへ橋渡しした 3d の op `estimate_oriented_normals。実装は同じで、呼び出し規約だけ op(v, a, b) に合わせてある。a が k(既定 20)を振る。b` は未使用。

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)

• (none yet)

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

identity · tb_points_to_voxel · tb_estimate_point_normals · tb_iss_keypoints · tb_angle_3points · tb_project_points · tb_render_point_depth · tb_statistical_outlier_removal

Same category (`typed`)

tb_points_to_voxel · tb_estimate_point_normals · tb_iss_keypoints · tb_angle_3points · tb_project_points · tb_render_point_depth · tb_statistical_outlier_removal · tb_radius_outlier_removal

*Provenance: ops.py — 2D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

tb_estimate_oriented_normals — 2D typed op