reflectance op• Datenarten: normalmap → rgbimage
• Aufruf: 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) (die Implementierung direkt: 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); aus dem Register: opsspecular.get("dichromatic_render"))
Vorwärtsmodell des dichromatischen Modells: rendert ein bekanntes Glanzlicht, an dem eine Trennung geprüft werden kann. → (H, W, 3).
> Die ausführliche Beschreibung unten ist der Originaltext — Zusammenfassung und Überschriften sind übersetzt.
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.
• Leitfaden zur Familie specular_photometric
• Katalog der Beispieldaten (Download-URLs / Lizenzen) — 2-D nutzt skimage.data (BSD/Public Domain) plus synthetische Bilder, 3-D nennt Download-URLs echter Datenquellen (Stanford, PDS, …).
• Herkunft und Literatur der Operatoren — die Quellen der Forschung/Verfahren, auf denen diese Operatorfamilie beruht.
• Der kanonische Algorithmus (Autor, Jahr) und seine Anwendungen stehen im Familienleitfaden oben.
• specular_photometric — py -3.11 examples/specular_photometric.py
rgbimage als Eingabe)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. Diese Notiz wird von tools/opdocs.py md erzeugt (nicht von Hand bearbeiten).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.