reflectance op• データ種: normalmap → rgbimage
• 呼び出し: import fullseye as fs; fs.ledger.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) (実装を直接呼ぶなら 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)、台帳から引くなら opsspecular.get("dichromatic_render"))
二色性モデルの順方向: 既知のハイライトを描き、分離結果をそれと突き合わせられるようにする。→ (H, W, 3)。
> 以下の詳細説明は原文のままです —— 要約と見出しは訳出済み。
I = albedo_rgb * max(n.l, 0) + specular * lobe(n) * illuminant_unit, the body term coming straight from 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 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 visiondesign draws. Its purpose is a synthetic image whose decomposition is known exactly.
Raises ValueError: geometry problems as in 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 BRDF_MODELS.
• specular_photometric ファミリ ガイド
• サンプルデータ カタログ(DL URL / ライセンス) — 2-D は skimage.data(BSD/public)+ 合成、3-D は実データ源(Stanford/PDS 等)の DL URL。
• 演算子の来歴・参考文献 — この op 族の元になった研究/手法の出典。
• アルゴリズムの正典(著者・年)と用途は上記ファミリ使い方ガイドに記載。
• specular_photometric — py -3.11 examples/specular_photometric.py
rgbimage を入力に取れる)specular_diffuse_split · specular_coefficient_map · specular_free_transform · illuminant_from_dichromatic_planes
reflectance)brdf_blinn_phong · brdf_microfacet
*Provenance: specularity.py — SPECULAR operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.