Lapped textures

Abstract

Figure 1: Four different textures pasted on the bunny model. The last picture illustrates changing local orientation and scale on the body. AbstractWe present a method for creating texture over an arbitrary surface mesh using an example 2D texture. The approach is to identify interesting regions (texture patches) in the 2D example, and to repeatedly paste them onto the surface until it is completely covered. We call such a collection of overlapping patches a lapped texture. It is rendered using compositing operations, either into a traditional global texture map during a preprocess, or directly with the surface at runtime. The runtime compositing approach avoids resampling artifacts and drastically reduces texture memory requirements.Through a simple interface, the user specifies a tangential vector field over the surface, providing local control over the texture scale, and for anisotropic textures, the orientation. To paste a texture patch onto the surface, a surface patch is grown and parametrized over texture space. Specifically, we optimize the parametrization of each surface patch such that the tangential vector field aligns everywhere with the standard frame of the texture patch. We show that this optimization is solved efficiently as a sparse linear system.

XDoG: An eXtended difference-of-Gaussians compendium including advanced image stylization

“…17(b). For hatching with global directions, the textures may be pre-computed using texture synthesis [38,39]. For hatching with local directions, local regions are defined by segmenting the (colored) source image (e.g.…”

Repeatable texture sampling with interchangeable patches

“…In turn, this visible aberration is addressed by nonrectangular region copying, such as megatexture [14], virtual texturing [4,16], and patch-based methods [15]. However, these methods rely on cached information, which can cause temporal artefacts when a scene is rerendered in a different order.…”

“…Parallel non-constant-time patch replacement methods [5,15,17] perform a non-constant overhead operation while rendering, to address grid artefacts. These methods place patches of precomputed shape on the texture at run-time, according to a run-time computation, but require a fixed patch map whose boundaries cannot be overlaid with a patch.…”

Simple Flexible Skinning Based on Manifold Modeling

“…Reversely, an atlas can be constructed from the final surface to be represented. The global parameterization of the surface is used for high-quality sampling, texture mapping or reparameterization (Praun et al, 2000). In this case again, the components of the atlas have to be defined explicitly and with continuity constraints.…”