rgb_to_quaternion — QUAT convert op

• 数据种类:rgbimage → qimage

• 调用:import quatimage; quatimage.rgb_to_quaternion(image_rgb) -> 'np.ndarray'(或 opsquat.get("rgb_to_quaternion"))

用法

把彩色图像嵌入为纯四元数 `0 + R i + G j + B k`。→ (H, W, 4)。

> 以下的详细说明为原文 —— 摘要与标题已翻译。

Sangwine's 1996 encoding, and the entry point of the whole colour half of

this module: once a pixel is a quaternion, `q x conj(q)` rotates its colour

and :func:qft2 transforms the three channels as one hypercomplex signal

instead of three unrelated real ones.

The scalar (`w`) component is set to exactly zero — a *pure* quaternion —

because that is what makes the conjugation a 3-D rotation. Values are not

clamped: linear RGB after black-level subtraction legitimately goes negative,

and clipping it would change the colour direction, which is the quantity

every operator downstream reads.

Raises `ValueError: *image_rgb* is not a finite (H, W, 3)` numeric

array, is complex / bool / string-typed / masked, or exceeds

:data:MAX_PIXELS.

详细使用指南

• quaternion_monogenic 族使用指南

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。

• 算法的正典(作者・年份)与用途见上面的族使用指南。

可运行的示例(实际调用该算子并已验证的样例)

• quaternion_monogenic — py -3.11 examples/quaternion_monogenic.py

类型可衔接的下一个算子(可接受 qimage 作为输入)

quaternion_to_rgb · quat_norm · quat_conjugate_image · quat_normalize_image · quat_image_multiply · monogenic_amplitude · monogenic_phase · monogenic_orientation

同类别(convert)

quaternion_to_rgb · quat_norm

*Provenance: quatimage.py — QUAT 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.