Material — Illumination Ambiguities and the Perception of Solid Objects

摘要: The appearance of objects depends on their material, shape, and the illumination conditions. Conversely, object provides us with cues about material. This so-called inverse problem is basically underdetermined therefore we expect that material perception are confounded. To gain insight into relevant mechanisms, rendered a set artificial spheres for vastly different canonical light fields reflectance functions. We used four physics-based bidirectional distribution functions (BRDFs) representing glossy, pitted, velvety, matte six conditions were collimated from directions, hemispherical diffuse illumination, fully (Ganzfeld) illumination. In three sub-experiments presented pairs stimuli asked human observers to judge whether was same, subset in which either or materia...