By Xianfeng Gu, Steven J. Gortler, Michael F. Cohen (auth.), Prof. Dr. Julie Dorsey, Dr. Philipp Slusallek (eds.)
The ebook comprises the lawsuits of the eighth Eurographics Rendering Workshop, which came about from sixteenth to 18th June, 1997, in Saint Etienne, France. After a sequence of 7 winning occasions the workshop is now good proven because the significant overseas discussion board within the box of rendering and illumination options. It introduced jointly the specialists of this box. Their fresh study effects are compiled during this complaints including many colour photographs that show new rules and methods. This yr we bought a complete of sixty three submissions of which 28 have been chosen for the workshop after a interval of cautious reviewing and review through the 27 mem bers of the overseas application committee. the standard of the submissions used to be back very excessive and, regrettably, many fascinating papers needed to be rejected. as well as normal papers this system additionally includes invited lectures via Shenchang Eric Chen (Live photo) and consistent with Christensen (Mental Images). The papers during this court cases include new examine leads to the components of Finite-Element and Monte-Carlo illumination algorithms, image-based render ing, outside and usual illumination, mistakes metrics, conception, texture and colour dealing with, information acquisition for rendering, and effective use of undefined. whereas a few contributions document effects from extra effective or stylish algo rithms, others pursue new and experimental methods to discover higher strategies to the open difficulties in rendering.
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Additional resources for Rendering Techniques ’97: Proceedings of the Eurographics Workshop in St. Etienne, France, June 16–18, 1997
Example text
11] describe a method for measuring anisotropic reflectance using just a CCD camera, quartz-halogen lamp and a diffuse reference standard. Gortler et al. [7] and Levoy and Hanrahan [12] describe methods for rerendering the appearance of an object for fixed lighting conditions from a large series of video images. Ofek et al. [16] have developed a method for obtaining texture maps from non-planar, shiny, objects using a series J. Dorsey et al. ), Rendering Techniques ’97 © Springer-Verlag/Wien 1997 36 of video images.
For obtaining surface geometry from lighting variations begins with a simple model for the reflected radiance from a point on a surface. Assuming a Lambertian surface illuminated by a distance small source the reflected radiance Lr is given by: (1) where p is the Lambertian reflectance, Lo is the light source radiance, Llw is the solid angle subtended by the light source, n is the surface normal and i is the direction to the light source (see Figure 1). light source with radiance Lo Fig. 1. Geometry of light reflectance, using the symbols defined in Eq .
We replace each dense range map by a sparse triangle mesh that closely approximates it. We then texture map each triangle mesh using the associated colored image. To synthesize an image ofthe object from a fixed viewpoint we individually render the meshes constructed from three close viewpoints and blend them together with a pixel-based weighting algorithm that uses soft z-buffering. 1 A simple approach To better understand the virtues of our approach, it is helpful to contrast it with a simpler algorithm.