Gloss and Normal Map Acquisition Using Gray Codes

We build on our previously proposed method [Francken et al. 2008], which acquires normal maps by analyzing the reflection of binary patterns (Gray codes). These patterns are successively refined in this process. The key idea in this paper, is that this refinement also allows us to measure the shininess for each spatial location, resulting in a gloss map. Acquiring spatially varying reflectance usually requires a complicated hardware setup, which measures the BRDF at each spatial location. Our method is much simpler and cheaper. Even though we assume a very simplified BRDF model, our technique is able to reproduce the mesostructure’s appearance faithfully.