Istituto di Scienza e Tecnologie dell'Informazione     
Tarini M., Cignoni P., Scopigno R. Visibility Based Methods and Assesment for Detail-Recovery. In: Visualization 2003 (Seattle, Washington, 19-24 October 2003). Proceedings, pp. 457 - 463. Greg Turk, Jarke J. Van Wijk, Robert Moorthead (eds.). IEEE, 2003.
In this paper we propose a new method for the creation of normal maps for recovering the detail on simplified meshes and a set of objective techniques to metrically evaluate the quality of different recovering techniques. The proposed techniques, that automatically produces a normal-map texture for a simple 3D model that "imitates" the high frequency detail originally present in a second, much higher resolution one, is based on the computation of per-texel visibility and self-occlusion information. This information is used to define a point-to-point correspondence between simplified and hires meshes. Moreover, we introduce a number of criteria for measuring the quality (visual or otherwise) of a given mapping method, and provide efficient algorithms to implement them. Lastly, we apply them to rate different mapping methods, including the widely used ones and the new one proposed here.
URL: http://ieeexplore.ieee.org/Xplore/DynWel.jsp
Subject computer graphics
I.3.7 Computer Graphics. Three.Dimensional Graphics and Realism. Color,

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