domain op• Data kinds: voxel → voxel
• Call: import fullseye as fs; fs.ledger.vol_crop_domain(vol, domain=None, margin=0) (to call the implementation directly, import volops; volops.vol_crop_domain(vol, domain=None, margin=0); from the registry, ops3d.get("vol_crop_domain"))
• Return value through the ledger: fullseye.ledger.vol_crop_domain(...) returns **only the declared out type voxel** (the underlying function also returns auxiliary values). When you need what was dropped, use fullseye.ledger.vol_crop_domain.raw(...) or call volops.vol_crop_domain directly.
• Underlying return: (part, offset)
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).
• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).
• Operator provenance and references — the sources of the research/methods this op family came from.
• roi_domain_boundary — py -3.11 examples_3d/roi_domain_boundary.py
voxel as input)voxel_to_mips · voxel_to_mesh · signed_distance_field · to_points · sobel3d · hessian3d · curvature_maps · edt_jfa
domain)vol_reduce_domain · vol_bounding_box · vol_uncrop · vol_tiled_map
*Provenance: volops.py — 3D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.