vol_stretch — 3D gray op

• 数据种类:voxel → voxel

• 调用: import fullseye as fs; fs.ledger.vol_stretch(vol, p_low=1.0, p_high=99.0)(要直接调用实现,import volgray; volgray.vol_stretch(vol, p_low=1.0, p_high=99.0);从台账取用则 ops3d.get("vol_stretch"))

用法

按分位数把对比度拉伸到 `[0, 1](稳健版 scale_image_max`)。

> 以下的详细说明为原文 —— 摘要与标题已翻译。

Computes the *p_low*-th and *p_high*-th intensity percentiles and maps

`[P(p_low), P(p_high)] linearly onto [0, 1]`, clipping outside — so a

handful of hot/cold outlier voxels (a metal artefact, a dead detector

element) no longer dictates the display range, unlike a plain min/max

normalisation. The defaults (1 % / 99 %) are the usual display-stretch

choice.

If the two percentile values coincide (a constant — or near-constant —

volume), the input is returned unchanged rather than divided by zero

(see the module docstring's flat-volume note).

Parameters

----------

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

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

p_low, p_high : float

Percentiles in `[0, 100] with p_low < p_high` (fail-closed).

Returns

-------

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

The stretched volume in `[0, 1]` (degenerate percentiles: the input

itself).

Raises

------

ValueError

Non-3-D / non-finite input, percentiles out of `[0, 100]`, or

`p_low >= p_high`.

参考(示例数据・文献)

• 示例数据目录(下载 URL / 许可证) —— 2-D 用 skimage.data(BSD/公有领域)加合成图,3-D 给出真实数据源(Stanford/PDS 等)的下载 URL。

• 算子来历与参考文献 —— 该算子族所依据的研究/方法出处。

可运行的示例(实际调用该算子并已验证的样例)

• gray_window_level — py -3.11 examples_3d/gray_window_level.py

类型可衔接的下一个算子(可接受 voxel 作为输入)

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

同类别(gray)

vol_window_level · vol_equalize · vol_gamma

*Provenance: volgray.py — 3D 算子登记表。本条目由 tools/opdocs.py md 自动生成(请勿手工编辑)。*

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