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])

*圖為在 128×128 合成輸入上實際執行的輸出。左為輸入,右為輸出。點雲以俯視散點顯示(亮度 = z),一維序列為折線,體資料為沿 z 的最大值投影,影片為中間影格,複數影像為振幅;無法成像的回傳值直接顯示數值。*
掃描旋鈕 a(0.1 / 0.5 / 0.9,另一旋鈕取預設):
▸ tb_pc_fill_sparse: knob a sweep (docs site)
*旋鈕 b 不改變輸出(實測: 0.1 / 0.5 / 0.9 相同)。*
階段(前置運算子 → 本運算子,由左至右):
▸ tb_pc_fill_sparse: stages (docs site)
換別的影像(合成場景 / 照片 / 硬幣。上排為輸入,下排為對應輸出。旋鈕取預設):
▸ tb_pc_fill_sparse: other inputs (docs site)
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.
• 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。
下面的程式已確認可以執行(與圖相同的輸入)。在 Studio 說明中,此區塊會變成按鈕,可當場載入並執行。
img_to_points 0.50 0.50 tb_pc_fill_sparse 0.50 0.50
▸ Load this pipeline · Load & run
下面的範例呼叫的是底層帳本運算子 pc_fill_sparse。此橋接運算子只是把同一實作適配為 fn(v, a, b) 慣例,行為完全相同(只是呼叫形式不同)。
• mesh_resolution_demo — py -3.11 examples_3d/mesh_resolution_demo.py
points 作為輸入)identity · tb_points_to_voxel · tb_estimate_point_normals · tb_iss_keypoints · tb_project_points · tb_render_point_depth · tb_statistical_outlier_removal · tb_radius_outlier_removal
typed)tb_points_to_voxel · tb_estimate_point_normals · tb_iss_keypoints · tb_project_points · tb_render_point_depth · tb_statistical_outlier_removal · tb_radius_outlier_removal · tb_voxel_grid_downsample
*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.