log_zero_crossings — 3D edges op

• Data kinds: voxel → voxel

• Call: import edges3d; edges3d.log_zero_crossings(vol, sigma: 'float' = 1.5, rel_thresh: 'float' = 0.001) -> 'np.ndarray' (or ops3d.get("log_zero_crossings"))

Usage

Zero-crossing edges of the Laplacian of Gaussian.

References (sample data, literature)

• 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.

Runnable examples (verified samples that actually call this op)

• edges_3d — py -3.11 examples_3d/edges_3d.py

Ops the type connects to (they accept voxel as input)

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

Same category (edges)

gradient3d · canny3d · link_edges · edge_points

*Provenance: edges3d.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.