vol_window_level — 3D gray op

• 資料種類:voxel → voxel

• 呼叫: import fullseye as fs; fs.ledger.vol_window_level(vol, center, width, out_range=(0.0, 1.0))(要直接呼叫實作,import volgray; volgray.vol_window_level(vol, center, width, out_range=(0.0, 1.0));從台帳取用則 ops3d.get("vol_window_level"))

用法

CT 窗寬/窗位(HU 窗)—— 放射科醫師每天用的線性重映射。

> 以下的詳細說明為原文 —— 摘要與標題已翻譯。

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*.

參考(範例資料・文獻)

• 範例資料目錄(下載 URL / 授權) —— 2-D 用 skimage.data(BSD/公有領域)加合成圖,3-D 給出真實資料源(Stanford/PDS 等)的下載 URL。

• 運算子來歷與參考文獻 —— 該運算子族所依據的研究/方法出處。

可執行的範例(實際呼叫該運算子並已驗證的樣例)

• gray_window_level — py -3.11 examples_3d/gray_window_level.py

型別可銜接的下一個運算子(可接受 voxel 作為輸入)

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

同類別(gray)

vol_equalize · vol_gamma · vol_stretch

*Provenance: volgray.py — 3D 運算子登記表。本條目由 tools/opdocs.py md 自動產生(請勿手動編輯)。*

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.