High quality realistic rendering is one of the major goals in computer graphics. To achieve this goal, however, we usually have to handle very large data set due to the requirement of high level of details. By using texture tiling to model surface details, not only the data stored can be much reduced, the time consuming data synthesis process can be performed offline as well....[ Read more ]

High quality realistic rendering is one of the major goals in computer graphics. To achieve this goal, however, we usually have to handle very large data set due to the requirement of high level of details. By using texture tiling to model surface details, not only the data stored can be much reduced, the time consuming data synthesis process can be performed offline as well.

This thesis reformulates the tiling mechanism of Wang tiles for arbitrary topologi-cal surfaces so that we can decouple the surface appearance from the geometry. As a result, we can synthesize tiles independently from the object surface. Once we created a low distortion conformal map from the input geometry to a quad-based geometry, we can generate a tiling graph over the geometric dual graph of the quad-based geometry, and produce a proper tile orientation on all quad faces. In this way, we can properly layout Wang tiles on quads and map the tiled texture (surface details) back to the input surface accordingly. Once a set of tiles is created, we can use the same set of tiles to dress different models. As the tiling process is independent of the object surface, texture (surface details) dressing is efficiently fast.

To further enrich the surface appearance, our method can be used with the bidi-rectional texture functions (BTF) to layout BTF tiles onto the object surface. We also proposed in this research a novel method for synthesizing seamless high-dimensional BTF tiles, which are difficult for existing synthesis techniques. We divide the tile synthesis process into several steps, aim to shorten the cutting paths, and broaden the choices of samples so as to increase the chance of synthesizing seamless BTF tiles.