vol_crop_domain — 3D domain op

• データ種: voxel → voxel

• 呼び出し: import fullseye as fs; fs.ledger.vol_crop_domain(vol, domain=None, margin=0) (実装を直接呼ぶなら import volops; volops.vol_crop_domain(vol, domain=None, margin=0)、台帳から引くなら ops3d.get("vol_crop_domain"))

• 台帳経由の戻り値: fullseye.ledger.vol_crop_domain(...) は**宣言 out 型 voxel の値だけ**を返す(本体は補助情報も返す)。捨てられた側が要るときは fullseye.ledger.vol_crop_domain.raw(...)、または volops.vol_crop_domain を直接呼ぶ。

• 本体の返り: (part, offset)

使い方

Crop a volume to the tight bounding box of a domain (HALCON `crop_domain`).

This is the memory lever of the domain family: a 512**3 CT scan whose

part of interest fits in 128**3 costs 64x less memory and compute once

cropped — and the Hessian operators (:func:vol_frangi / :func:vol_sato),

capped at `MAX_EIGEN_VOXELS`, often become *possible* only after this

step. Gray values inside the box are kept verbatim (the box, not the mask,

defines the crop — pair with :func:vol_reduce_domain first if voxels

outside the mask but inside the box must read 0).

*domain* defaults to the volume's own non-zero support (`vol != 0` —

a gray volume is cropped to wherever it has any signal; note this differs

from the `> 0.5` convention used when an explicit binary *domain* is

passed). *margin* is forwarded to :func:vol_bounding_box.

Returns `(cropped, offset) — the (d, h, w)` float64 sub-volume and the

`(z0, y0, x0)` voxel offset of its origin in the input frame. Keep the

offset: :func:vol_uncrop maps results back, and

:func:vol_boundary_points accepts it as *origin* so point coordinates stay

in the uncropped frame. An empty domain raises `ValueError` (fail-closed).

参考(サンプルデータ・文献)

• サンプルデータ カタログ(DL URL / ライセンス) — 2-D は skimage.data(BSD/public)+ 合成、3-D は実データ源(Stanford/PDS 等)の DL URL。

• 演算子の来歴・参考文献 — この op 族の元になった研究/手法の出典。

実行できる例(この op を実際に呼ぶ検証済みサンプル)

• roi_domain_boundary — py -3.11 examples_3d/roi_domain_boundary.py

型が繋がる次の op(voxel を入力に取れる)

voxel_to_mips · voxel_to_mesh · signed_distance_field · to_points · sobel3d · hessian3d · curvature_maps · edt_jfa

同カテゴリ(domain)

vol_reduce_domain · vol_bounding_box · vol_uncrop · vol_tiled_map

*Provenance: volops.py — 3D operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。*

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