typed op• 数据种类:points → points
• 调用:fullseye.apply(img, "tb_pc_fill_sparse", a=0.5, b=0.5)(2-D 的模型是一张图 + 两个标量旋钮 a,b∈[0,1])

*图为在 128×128 合成输入上实际运行的输出。左为输入,右为输出。点云以俯视散点显示(亮度 = z),一维序列为折线,体数据为沿 z 的最大值投影,视频为中间帧,复数图像为幅值;无法成像的返回值直接显示数值。*
扫描旋钮 a(0.1 / 0.5 / 0.9,另一旋钮取默认):
▸ tb_pc_fill_sparse: knob a sweep (docs site)
*旋钮 b 不改变输出(实测: 0.1 / 0.5 / 0.9 相同)。*
阶段(前置算子 → 本算子,从左到右):
▸ tb_pc_fill_sparse: stages (docs site)
换别的图像(合成场景 / 照片 / 硬币。上排为输入,下排为对应输出。旋钮取默认):
▸ tb_pc_fill_sparse: other inputs (docs site)
在局部间距超过 *spacing* 的地方,于局部 PCA 平面上插入点(`points`)。
> 以下的详细说明为原文 —— 摘要与标题已翻译。
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.
• 示例数据目录(下载 URL / 许可证) —— 2-D 用 skimage.data(BSD/公有领域)加合成图,3-D 给出真实数据源(Stanford/PDS 等)的下载 URL。
• 算子来历与参考文献 —— 该算子族所依据的研究/方法出处。
下面的程序已确认可以运行(与图相同的输入)。在 Studio 帮助中,此块会变成按钮,可当场加载并运行。
img_to_points 0.50 0.50 tb_pc_fill_sparse 0.50 0.50
▸ Load this pipeline · Load & run
下面的示例调用的是底层账本算子 pc_fill_sparse。此桥接算子只是把同一实现适配为 fn(v, a, b) 约定,行为完全相同(只是调用形式不同)。
• mesh_resolution_demo — py -3.11 examples_3d/mesh_resolution_demo.py
points 作为输入)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 算子登记表。本条目由 tools/opdocs.py md 自动生成(请勿手工编辑)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.