boundary op• 資料種類:voxel → voxel
• 呼叫: import fullseye as fs; fs.ledger.vol_boundary(vol_binary, connectivity=6, side='inner')(要直接呼叫實作,import volops; volops.vol_boundary(vol_binary, connectivity=6, side='inner');從台帳取用則 ops3d.get("vol_boundary"))
二值體的邊界殼(3-D 版 region_boundary)。
> 以下的詳細說明為原文 —— 摘要與標題已翻譯。
side='inner' keeps the foreground voxels that touch background:
mask & ~erode(mask). side='outer' keeps the background voxels that touch foreground: dilate(mask) & ~mask. *connectivity* (6/18/26) decides which neighbours count as "touching" — 6 uses face neighbours only (the thinnest shell); 26 also counts a diagonal background contact, so shells at convex corners come out thicker. The volume border counts as background for the *inner* shell (a mask reaching the border has a boundary there — the same convention as the surface-area estimate in vol_region_props); the *outer* shell can only occupy voxels that exist, so a mask filling the whole volume has an empty outer boundary.
A solid region's interior drops out entirely: the shell of a solid ball of radius r voxels is roughly a 3/r fraction of it (surface over volume), so the saving grows with size — which is exactly why boundary representations (and vol_boundary_points) are the memory-frugal way to hand a shape to the point-cloud / metrology operators.
Returns a (D, H, W) float64 {0, 1} volume (chainable into vol_label, vol_boundary_points, ...).
• 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。
• roi_domain_boundary — py -3.11 examples_3d/roi_domain_boundary.py
voxel 作為輸入)voxel_to_mips · voxel_to_mesh · signed_distance_field · to_points · sobel3d · hessian3d · curvature_maps · edt_jfa
boundary)*Provenance: volops.py — 3D 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.