Creating and Exploring a Large Photorealistic Virtual Space

Jiri Filip
UTIA Praha, Czech Republic

One of ultimate goals of computer science is realtime and accurate simulation of realword objects appearance in virtual scenes. Bidirectional Texture Functions (BTF) are currently one of the most accurate and affordable ways of real-world materials appearance representation. BTFs describe variations of material surface texture appearance due to varying illumination and viewing directions. This 6D function is acquired by large number of still images for thousands of combinations of illumination and viewing directions. This results in massive datasets prohibiting any interactive application and hence compressed representations providing fast recontruction of these huge BTF texture data spaces is obviously inevitable. We will briefly describe motivation for using BTF data, related measurement, compression and modelling methods. We will discuss also ways of these method's optimization based on human perception and gaze data analysis.