typed op• 資料種類:qimage → rgbimage
• 呼叫:fullseye.apply(img, "tb_quaternion_to_rgb", a=0.5, b=0.5)(2-D 的模型是一張圖 + 兩個純量旋鈕 a,b∈[0,1])
*無圖: 該運算子以 qimage 為輸入。從影像開始的 Studio 程式無法到達該型別，請參見下方的可執行範例。*
四元數影像的向量部分，作為線性 RGB。→ (H, W, 3)。
> 以下的詳細說明為原文 —— 摘要與標題已翻譯。
The inverse of :func:rgb_to_quaternion — and, by default, a *checked*
inverse. A quaternion image that picked up a scalar component somewhere (a
Hamilton product with a non-pure quaternion, a monogenic signal handed here
by mistake) is refused rather than silently truncated, because dropping
the `w` component is exactly the kind of loss that produces a plausible
picture from the wrong data. Pass `allow_scalar=True` to opt in to the
truncation when it is what you meant.
The tolerance is relative to the field's own peak modulus
(:data:_MONOGENIC_K_TOL, 1e-9): a quaternion image that really is pure
carries `|w|` at the 1e-17 level after a round trip through two FFTs, and
anything with a meaningful scalar part is many orders above that. Nothing
real lives in between.
Raises `ValueError: *qimage* is not a finite (H, W, 4)` array; or
it has a non-negligible scalar part and `allow_scalar` is False.
Typed bridge of the quat op `quaternion_to_rgb into the 2-D evolution registry: the same implementation, called under the op(v, a, b) convention. This op has no tunable parameter; a and b` are unused.
• 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。
• (尚無)
rgbimage 作為輸入)identity · tb_wetness · tb_sensor_capture · tb_specular_diffuse_split · tb_specular_coefficient_map · tb_specular_free_transform · tb_rgb_to_quaternion
typed)tb_points_to_voxel · tb_estimate_point_normals · tb_iss_keypoints · tb_angle_3points · tb_project_points · tb_render_point_depth · tb_statistical_outlier_removal · tb_radius_outlier_removal
*Provenance: ops.py — 2D 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.