3D Mesh Coding Techniques Applied to CAD Data: A Comparative Evaluation

Abstract

This paper presents a study of 3D mesh compression techniques within the specific framework of CAD applications. A state-of-the art of 3D mesh compression approaches is first presented and analyzed under the light of CAD data specificities. A CAD corpus, provided by the French car manufacturer RENAULT is then quantitatively analyzed in terms of geometricotopological properties. This analysis reveals that CAD content often violates the common regularity assumptions underlying 3D coding approaches. Finally, a comparative evaluation of several state-ofthe art techniques is presented. Experimental results show the difficulties of general purpose coders to efficiently handle CAD data, which confirms the need of designing CAD-specific coding techniques