Shading Into Texture
نویسنده
چکیده
Shape-from-shading and shape-from-texture methods have the serious drawback that they are applicable only to smooth surfaces, while real surfaces are often rough and crumpled. TO extend such methods to real surfaces we must have a model that also applies to rough surfaces. The fractal surface model [Pentland 831 provides a formalism that is competent to describe such natural 3-D surfaces and, in addition, is able to predict human perceptual judgments of smoothness versus roughness thus allowing the reliable application of shape estimation techniques that assume smoothness. Thia model of surface shape has been used to derive a technique for 3-D shape estimation that treats shading and texture in a uni6ed manner.
منابع مشابه
Hardware-Assisted Relief Texture Mapping
Image-Based Rendering by Warping (IBRW) creates three-dimensional scene by deforming several 2D images with depth information. Image-based rendering has an advantage compared to traditional polygon rendering that the rendering time is still constant even if a scene becomes complex. Relief texture mapping decomposes IBRW into a very simple 1D image operation and a traditional texture mapping, wh...
متن کاملA Review on Histogram Value and Texture Descriptor Analysis for Image Retrieval
---------------------------------------------------------------------***--------------------------------------------------------------------Abstract Color and texture data have been the primitive image or picture descriptors in substance or content based picture recovery frameworks. In this article, a technique is introduced for image or picture mining taking into account examination of shading...
متن کاملUsing Texture Synthesis for Non-Photorealistic Shading from Paint Samples
This paper presents several methods for shading meshes from scanned paint samples that represent dark to light transitions. Our techniques emphasize artistic control of brush stroke texture and color. We first demonstrate how the texture of the paint sample can be separated from its color gradient. We demonstrate three methods, two real-time and one off-line, for producing rendered, shaded imag...
متن کاملHigher Quality Volume Rendering on PC Graphics Hardware
Shading and classification are among the most powerful and important techniques used in volume rendering. Unfortunately, for hardware accelerated volume rendering based on OpenGL, direct classification is only supported on SGI platforms and shading could previously only be approximated inaccurately, resulting in shading artifacts mostly visible in darkening artifacts. So far, the combination of...
متن کاملWUCSE-2003-54: Using Texture Synthesis for Non-Photorealistic Shading from Paint Samples
This paper presents several methods for shading meshes from scanned paint samples that represent dark to light transitions. Our techniques emphasize artistic control of brush stroke texture and color. We first demonstrate how the texture of the paint sample can be separated from its color gradient. We demonstrate three methods, two real-time and one off-line for producing rendered, shaded image...
متن کامل