Webspherical gradient illumination patterns related to the second order spherical harmonics are sufficient for a robust estimate of per pixel specular roughness (Fig. 1, (c)). Thus, we go further than previous work on image-based measurement of specular BRDFs that typi-cally obtain sparse estimates of the spatial variation. Our technique WebLight Stage 5 is the main spherical gradient illumination device in this project. It consists of 156 LED lights placed on the vertices and edges of a once-subdivided icosahedron and creates a...

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WebWe present a novel process for acquiring detailed facial geometry with high resolution diffuse and specular photometric information from multiple viewpoints using polarized … WebApr 11, 2024 · While capturing spherical color gradient illumination still requires a special lighting setup, reduction to just two illumination conditions allows the technique to be applied to dynamic facial ... hors ceci

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WebAug 9, 2024 · The method allows us to estimate layered reflectance albedos using a single-shot polarized light-field image under either uniform (TPLF) or partially (FPLF) polarized illumination. Furthermore, the method achieves novel layered separation of photometric normals acquired under polarized spherical gradient illumination. WebFigure 1: Top, images taken under spherical gradient illumination. Middle, A subset of the structured light pattern images of three different frequencies plus a full white pattern. The other three stripe patterns have the same frequencies but with a 90 degree phase shift. Bottom, Results for each scan: albedo texture, world-space normal map, WebWe estimate surface normal maps of an object from either its diffuse or specular reflectance using four spherical gradient illumination patterns. In contrast to traditional photometric … hors champ film