reflectance op• Data kinds: normalmap → rgbimage
• Call: 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) (implementation को सीधे call करना हो तो 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), registry से लेना हो तो opsspecular.get("dichromatic_render"))
forward dichromatic model: एक ज्ञात highlight render करता है ताकि separation की उससे जाँच की जा सके। → (H, W, 3)।
> नीचे का विस्तृत विवरण मूल text में है — सारांश और headings का अनुवाद हो चुका है।
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 family guide
• Sample data catalog (DL URL / license) — 2-D के लिए skimage.data (BSD/public) + synthetic, 3-D के लिए real data sources (Stanford/PDS आदि) के DL URL।
• Operators का स्रोत और संदर्भ — इस op family के मूल research/methods के स्रोत।
• Algorithm का मानक स्रोत (लेखक, वर्ष) और उपयोग ऊपर की family usage guide में दिए गए हैं।
• specular_photometric — py -3.11 examples/specular_photometric.py
rgbimage को input के रूप में लेते हैं)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. यह per-op note tools/opdocs.py md से अपने-आप generate होता है (हाथ से edit न करें)।*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.