typed op• 데이터 종류: rgbimage → qimage
• 호출: fullseye.apply(img, "tb_rgb_to_quaternion", a=0.5, b=0.5)(2-D 는 이미지 1 장 + 스칼라 노브 2 개 a,b∈[0,1] 모델)
컬러 이미지를 순수 사원수(quaternion) `0 + R i + G j + B k`로 임베딩. → (H, W, 4).
> 아래 상세 설명은 원문입니다 —— 요약과 제목은 번역되어 있습니다.
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.
Typed bridge of the quat op `rgb_to_quaternion 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.
• 샘플 데이터 카탈로그(DL URL / 라이선스) —— 2-D 는 skimage.data(BSD/public)+ 합성, 3-D 는 실데이터 소스(Stanford/PDS 등)의 DL URL.
• 연산자의 내력·참고문헌 —— 이 연산자 족의 바탕이 된 연구/기법의 출처.
• (아직 없음)
qimage 를 입력으로 받는 것)identity · tb_quaternion_to_rgb · tb_quat_norm · tb_quat_conjugate_image · tb_quat_normalize_image · tb_monogenic_amplitude · tb_monogenic_phase · tb_monogenic_orientation
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 연산자 레지스트리. 이 op 노트는 tools/opdocs.py md 가 자동 생성합니다(직접 편집하지 마세요).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.