reflectance op• Data kinds: normalmap → image2d
• Call: import fullseye as fs; fs.ledger.brdf_blinn_phong(normals, light=(0.0, 0.0, 1.0), view=(0.0, 0.0, 1.0), shininess=32.0) (implementation को सीधे call करना हो तो import specularity; specularity.brdf_blinn_phong(normals, light=(0.0, 0.0, 1.0), view=(0.0, 0.0, 1.0), shininess=32.0), registry से लेना हो तो opsspecular.get("brdf_blinn_phong"))
Blinn का half-vector specular lobe। → (H, W), [0, 1] में।
> नीचे का विस्तृत विवरण मूल text में है — सारांश और headings का अनुवाद हो चुका है।
max(n.h, 0) ** shininess where h is the unit bisector of the light and view directions (Blinn 1977), zeroed wherever the surface faces away from either. Exactly 1 where the normal *is* the half-vector — the mirror condition — and it falls monotonically from there.
Unnormalised on purpose. The classical Blinn-Phong lobe does not integrate to a fixed value; its peak is 1 and its energy grows as the exponent shrinks. It is a shading model, useful because its peak location is exact and because it is a *different* lobe shape from brdf_microfacet — a separation routine that only works on one of the two is fitting the lobe, not the model. For an energy-consistent lobe use brdf_microfacet.
Reciprocal in light and view to machine precision (measured exactly 0.0 maximum difference in tests/test_specularity.py), because the half-vector is symmetric and the visibility test covers both sides.
Raises ValueError: *normals* is not an (H, W, 3) field or contains a zero-length normal; *light* / *view* are not non-zero 3-vectors; *shininess* is negative, non-finite, a string or a bool; light and view are exactly opposite.
• 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
image2d को input के रूप में लेते हैं)reflectance)brdf_microfacet · dichromatic_render
*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.