reflectance op• Datenarten: normalmap → image2d
• Aufruf: 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) (die Implementierung direkt: import specularity; specularity.brdf_blinn_phong(normals, light=(0.0, 0.0, 1.0), view=(0.0, 0.0, 1.0), shininess=32.0); aus dem Register: opsspecular.get("brdf_blinn_phong"))
Blinns Halbvektor-Glanzlappen. → (H, W) in [0, 1].
> Die ausführliche Beschreibung unten ist der Originaltext — Zusammenfassung und Überschriften sind übersetzt.
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.
• 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
image2d als Eingabe)reflectance)brdf_microfacet · dichromatic_render
*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.