Simplification of meshes with digitized radiance

Abstract

International audienceView-dependent surface color of virtual objects can be represented by outgoing radiance of the surface. In this paper we tackle the processing of outgoing radiance stored as a vertex attribute of triangle meshes. Data resulting from an acquisition process can be very large and computationally intensive to render. We show that when reducing the global memory footprint of such acquired objects, smartly reducing the spatial resolution is an effective strategy for overall appearance preservation. Whereas state-of-the-art simplification processes only consider scalar or vectorial attributes , we conversely consider radiance functions defined on the surface for which we derive a metric. For this purpose, several tools are introduced like coherent radiance function interpolation, gradient computation , and distance measurements. Both synthetic and acquired examples illustrate the benefit and the relevance of this radiance-aware simplification process

Editorial

“…Five papers on rendering and graphics hardware are in this special issue: the paper by Zheng and Zheng [24] is about photon tracing; the paper by Vanhoey et al [25] focuses on the mesh simplification using radiance; Adhikarla et al [26] describe a method to increase the quality of visual perception on light field display; Rodríguez-Cerro et al [27] present a technique for texture advection. The last paper by Kim and Kim [28] presents a method to improve the performance of graphics processor units.…”