vol_window_level — 3D `gray` op

• Data kinds: voxel → voxel

• Call: import fullseye as fs; fs.ledger.vol_window_level(vol, center, width, out_range=(0.0, 1.0)) (to call the implementation directly, import volgray; volgray.vol_window_level(vol, center, width, out_range=(0.0, 1.0)); from the registry, ops3d.get("vol_window_level"))

Usage

CT window/level (HU windowing) — the radiologist's daily linear remap.

Maps the intensity window [center - width/2, center + width/2] linearly onto *out_range* (lo, hi); voxels below the window saturate at lo, voxels above at hi (clipped, by design — that is what a CT window *does*). A bone window and a soft-tissue window on the same Hounsfield volume make entirely different structures visible. HALCON analogue:

scale_image (the linear part), plus the clip.

Parameters

vol : array_like, shape (D, H, W)

Input volume (coerced to float64; NaN/Inf rejected). Hounsfield units

or any other physical scale — *center* / *width* live on the same scale.

center, width : float

Window centre and full width. width must be > 0 (fail-closed).

out_range : (float, float)

Output (lo, hi) with lo < hi. Default (0.0, 1.0).

Returns

ndarray, shape (D, H, W), float64

The windowed volume, everywhere inside [lo, hi].

Raises

ValueError

Non-3-D / non-finite input, width <= 0, or a malformed *out_range*.

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)

• gray_window_level — py -3.11 examples_3d/gray_window_level.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 (`gray`)

vol_equalize · vol_gamma · vol_stretch

*Provenance: volgray.py — 3D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

vol_window_level — 3D gray op