tb_pc_fill_sparse — 2D typed op

• 資料種類:points → points

• 呼叫:fullseye.apply(img, "tb_pc_fill_sparse", a=0.5, b=0.5)(2-D 的模型是一張圖 + 兩個純量旋鈕 a,b∈[0,1])

用法

在局部間距超過 *spacing* 的地方,於局部 PCA 平面上插入點(`points`)。

> 以下的詳細說明為原文 —— 摘要與標題已翻譯。

For every point whose distance to its *k*-th neighbour exceeds *spacing*,

the segments to those neighbours longer than *spacing* are subdivided at

*spacing* intervals; the new points are projected onto the plane fitted

(PCA) to the point's neighbourhood so they follow the surface rather than

cut chords across it. The original points are kept; the result is then a

cloud whose spacing is ≤ target almost everywhere (pass it to

:func:pc_poisson_disk to remove the duplicates a shared edge creates —

:func:pc_density_equalize does both).

Typed bridge of the 3d op `pc_fill_sparse into the 2-D evolution registry: the same implementation, called under the op(v, a, b) convention. a drives k (default 8); b` is unused.

參考(範例資料・文獻)

• 範例資料目錄(下載 URL / 授權) —— 2-D 用 skimage.data(BSD/公有領域)加合成圖,3-D 給出真實資料源(Stanford/PDS 等)的下載 URL。

• 運算子來歷與參考文獻 —— 該運算子族所依據的研究/方法出處。

可執行的範例(實際呼叫該運算子並已驗證的樣例)

• (尚無)

型別可銜接的下一個運算子(可接受 points 作為輸入)

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

同類別(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 運算子登記表。本條目由 tools/opdocs.py md 自動產生(請勿手動編輯)。*

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.