boundary opvoxel → pointsimport fullseye as fs; fs.ledger.vol_boundary_points(vol_binary, spacing=None, connectivity=6, origin=(0, 0, 0)) (実装を直接呼ぶなら import volops; volops.vol_boundary_points(vol_binary, spacing=None, connectivity=6, origin=(0, 0, 0))、台帳から引くなら ops3d.get("vol_boundary_points"))Boundary shell as an (N, 3) point cloud in (z, y, x) order.
The bridge from the voxel world to the point-cloud world at minimal memory:
only the surface voxels of the mask become points (inner boundary, see
:func:vol_boundary), so a solid object of a million voxels typically
yields a few tens of thousands of points — ready for fit_sphere3 /
smallest_box3 / register_fpfh and friends without ever materialising
the full grid as points.
Coordinates are (index + origin) * spacing per axis: pass spacing
(sz, sy, sx) (or a :class:volio.VolumeMeta) for physical millimetre
coordinates, and pass the offset returned by :func:vol_crop_domain as
origin so points from a cropped volume land in the uncropped frame
(origin is in voxel units — it is added to the index before the
spacing multiply; it must be finite, and may be fractional for a subvoxel
shift). An empty mask returns an empty (0, 3) array (a valid question
with a valid empty answer — unlike a crop, which needs a box to exist).
Returns an (N, 3) float64 array, rows ordered z-major (deterministic).
py -3.11 examples_3d/roi_domain_boundary.pypoints を入力に取れる)points_to_voxel · gaussians_to_voxel · estimate_point_normals · to_points · match_points_ncc · match_pca · moment_axes · icp_point2point_3d
boundary)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.