geom_transform op• Datenarten: voxel → voxel
• Aufruf: import fullseye as fs; fs.ledger.vol_resize(vol, factor=None, shape=None, order=1, spacing=None, mode='nearest', cval=0.0) (die Implementierung direkt: import volxform; volxform.vol_resize(vol, factor=None, shape=None, order=1, spacing=None, mode='nearest', cval=0.0); aus dem Register: ops3d.get("vol_resize"))
• Rückgabewert über das Register: fullseye.ledger.vol_resize(...) liefert nur den Wert des deklarierten Out-Typs voxel (die zugrunde liegende Funktion gibt zusätzlich Hilfsinformationen zurück). Wird das Verworfene gebraucht, nutze fullseye.ledger.vol_resize.raw(...) oder rufe volxform.vol_resize direkt auf.
• Rückgabe der Funktion: spacing 付き時
Resampelt ein Volumen auf ein neues Gitter (scipy.ndimage.zoom, Zellsemantik).
> Die ausführliche Beschreibung unten ist der Originaltext — Zusammenfassung und Überschriften sind übersetzt.
Exactly one of *factor* / *shape* selects the target grid:
• factor — a positive scalar or (fz, fy, fx); the output shape is round(dim * f) per axis (scipy's rule, each >= 1).
• shape — the exact output (D', H', W') (positive integers).
Sampling uses grid_mode=True (cell semantics): a voxel is a *cell*, so an integer upscale f maps input voxel i exactly onto the output block [f*i, f*(i+1)) (exact at order=0), and the volume's physical extent is preserved by the recomputed spacing — not the endpoint-aligned convention of scipy's grid_mode=False default.
*mode* / *cval* set how samples that fall outside the input cells (the outer half-voxel shell of every upscale at order >= 1) are filled. The default "nearest" extends the border voxel, so a constant volume resizes to the same constant and a ramp keeps its end values. Until 2026-09-03 the call was hard-wired to "grid-constant" with cval=0, which blended the outer shell toward 0 — an upscale x2 of an all-ones volume came back with min = 0.42 on its faces, an artefact that then leaked into every downstream measurement. Other accepted modes: "reflect", "mirror", "grid-mirror", "grid-wrap", and "grid-constant" (with *cval*) when a zero-padded border is genuinely wanted. "constant" / "wrap" are rejected with a hint (scipy needs the grid- variants here).
The return shape depends on *spacing*:
• spacing=None (default) — returns the resampled (D', H', W') float64 volume alone.
• *spacing* given ((sz, sy, sx) or a VolumeMeta) — returns a 2-tuple (out, new_spacing) where new_spacing = (sz * D/D', sy * H/H', sx * W/W'), so out.shape * new_spacing == vol.shape * spacing per axis: the physical size in millimetres is invariant. Keep the new spacing — every spacing-aware operator downstream needs it.
*order* is the spline degree (exact integer 0..5; 0 = nearest — the choice for masks / labels, 1 = trilinear — the grey-value default; >1 can overshoot, see the module notes). Shrinking aliases (no band-limiting) — mean-pool with volops.volume_downsample first for large reductions.
Raises ValueError when both or neither of *factor* / *shape* are given, or when the output would exceed MAX_VOXELS (checked before any allocation — a huge factor cannot balloon memory).
• Katalog der Beispieldaten (Download-URLs / Lizenzen) — 2-D nutzt skimage.data (BSD/Public Domain) plus synthetische Bilder, 3-D nennt Download-URLs echter Datenquellen (Stanford, PDS, …).
• Herkunft und Literatur der Operatoren — die Quellen der Forschung/Verfahren, auf denen diese Operatorfamilie beruht.
• vol_geometry_transform — py -3.11 examples_3d/vol_geometry_transform.py
voxel als Eingabe)voxel_to_mips · voxel_to_mesh · signed_distance_field · to_points · sobel3d · hessian3d · curvature_maps · edt_jfa
geom_transform)*Provenance: volxform.py — 3D Operator-Registry. Diese Notiz wird von tools/opdocs.py md erzeugt (nicht von Hand bearbeiten).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.