reflectance op• 資料種類:normalmap → rgbimage
• 呼叫:import specularity; specularity.dichromatic_render(normals, albedo_rgb=(0.8, 0.55, 0.35), light=(0.3, 0.2, 1.0), illuminant_rgb=(1.0, 1.0, 1.0), view=(0.0, 0.0, 1.0), specular=0.25, model='blinn_phong', shininess=32.0, roughness=0.3, f0=0.04, ambient=0.0)(或 opsspecular.get("dichromatic_render"))
二色性模型的正向:算繪一個已知高光,以便據此檢驗分離結果。→ (H, W, 3)。
> 以下的詳細說明為原文 —— 摘要與標題已翻譯。
`I = albedo_rgb * max(n.l, 0) + specular * lobe(n) * illuminant_unit`, the
body term coming straight from :func:photometric.render_lambertian (called,
not re-implemented, so the two modules cannot drift apart in convention) and
the interface term carrying the illuminant colour, which is what makes
the image obey the dichromatic model exactly.
*albedo_rgb* may be a single `(3,)` colour — the single-material case that
:func:specular_diffuse_split handles without help — or an `(H, W, 3)`
map, which is the textured case that needs `body_rgb` passed to the split.
*model* selects the lobe: `"blinn_phong"` (*shininess*) or
`"microfacet"` (*roughness*, *f0*). Both are available on purpose: the
separation operators must be blind to the lobe shape, and swapping the model
is how that is tested rather than asserted.
This is a shading model, not light transport. No interreflection, no
cast shadow, no subsurface term, no occlusion between pixels — the same
boundary :mod:visiondesign draws. Its purpose is a synthetic image whose
decomposition is known exactly.
Raises `ValueError`: geometry problems as in
:func:brdf_blinn_phong; *albedo_rgb* is neither `(3,)` nor
`(H, W, 3)`; *specular* or *ambient* is negative, non-finite, a string or
a bool; *model* is not in :data:BRDF_MODELS.
• 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。
• 演算法的正典(作者・年份)與用途見上面的族使用指南。
• specular_photometric — py -3.11 examples/specular_photometric.py
rgbimage 作為輸入)specular_diffuse_split · specular_coefficient_map · specular_free_transform · illuminant_from_dichromatic_planes
reflectance)brdf_blinn_phong · brdf_microfacet
*Provenance: specularity.py — SPECULAR 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.