dichromatic op• 데이터 종류: rgbimage → rgbimage
• 호출: import specularity; specularity.specular_free_transform(image_rgb, illuminant_rgb=(1.0, 1.0, 1.0))(또는 opsspecular.get("specular_free_transform"))
광원 방향을 사영으로 빼냅니다: 하이라이트가 건드릴 수 없는 부분의 이미지. → (H, W, 3).
> 아래 상세 설명은 원문입니다 —— 요약과 제목은 번역되어 있습니다.
`I - (I.G) G for the unit illuminant colour G`. Under the dichromatic
model the interface term is `m_s * G`, so it lies entirely in the removed
direction and the result is invariant to any specular term whatsoever —
exactly, for any lobe shape, any strength, any spatial pattern. That is the
specular-invariant subspace of Mallick et al. (2005); this operator is the
projection itself, with no rotation into named channels, so it stays in RGB
and composes with the rest of the family.
Use it when the *shape* of the specular lobe is unknown or the surface is
textured — feature matching, edge detection and correlation all work in this
subspace without any of the assumptions
:func:specular_diffuse_split needs.
This is a projection, not a picture. The result loses one of three
degrees of freedom (its component along `G` is exactly zero everywhere)
and, for an image with negative values after black-level subtraction, keeps
them. It is not a displayable "highlight-removed photo" and does not claim
to be; for that, use :func:specular_diffuse_split.
Raises `ValueError: *image_rgb* is not a valid (H, W, 3)` linear
RGB image (see :func:specular_diffuse_split); *illuminant_rgb* is not a
non-zero 3-vector.
• specular_photometric 패밀리 가이드
• 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.
• 알고리즘의 정전(저자·연도)과 용도는 위의 패밀리 사용 가이드에 적혀 있습니다.
• specular_photometric — py -3.11 examples/specular_photometric.py
rgbimage 를 입력으로 받는 것)specular_diffuse_split · specular_coefficient_map · illuminant_from_dichromatic_planes
dichromatic)specular_diffuse_split · specular_coefficient_map · illuminant_from_dichromatic_planes
*Provenance: specularity.py — SPECULAR 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.