probe op• データ種: voxel → table
• 呼び出し: import fullseye as fs; fs.ledger.vol_edge_probe(vol, p0, p1, sigma=1.0, threshold=0.1, spacing=None, polarity='all') (実装を直接呼ぶなら import volprobe; volprobe.vol_edge_probe(vol, p0, p1, sigma=1.0, threshold=0.1, spacing=None, polarity='all')、台帳から引くなら ops3d.get("vol_edge_probe"))
Sub-sample edges along the probe `p0 -> p1`.
The profile (default sampling of :func:vol_profile_line) is smoothed
with a 1-D Gaussian of `sigma` samples, differentiated with respect
to the physical abscissa `t_mm`, and local extrema of the derivative
magnitude are taken as edges. Each is refined to sub-sample precision by a
3-point parabolic fit; plateau twins closer than 1.5 samples are merged.
`threshold` is an absolute derivative amplitude in intensity per
physical distance unit (per mm when `spacing` is given, per voxel
otherwise) — edges with `|d gray / d t| < threshold` at the peak are
discarded. It is *not* relative to the profile's own maximum: choose it
for your data's intensity range and spacing.
`polarity selects "positive"` (rising, dark -> bright along the
probe), `"negative" (falling) or "all"`.
Returns a list of dicts ordered by distance, each::
{"t_mm": physical distance of the edge from p0,
"position": (z, y, x) interpolated voxel coordinate of the edge,
"amplitude": |d gray / d t| at the peak (intensity / distance unit),
"polarity": +1 rising, -1 falling}
Raises `ValueError` on the same malformed inputs as
:func:vol_profile_line, a negative / non-finite `sigma` or
`threshold, or an unknown polarity`.
• 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。
• wall_thickness_probe — py -3.11 examples_3d/wall_thickness_probe.py
table を入力に取れる)fuse_to_voxel · mesh_select_lod
probe)vol_profile_line · vol_wall_thickness
*Provenance: volprobe.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.