ADAPTIVE-SIZE MESHES FOR RIGID AND NONRIGID SHAPE-ANALYSIS AND SYNTHESIS

This paper presents a new physically based modeling method that uses a daptive-size meshes to model surfaces of rigid and nonrigid objects. T he initial model uses a priori determined mesh size. However, the mesh size increases or decreases dynamically during surface reconstruction to locate nodes near surface areas of interest (like high curvature p oints) and to optimize the fitting error. Further, presented with the multiple 3-D data frames, the mesh size varies as the data surface und ergoes the nonrigid motion. This model is used to reconstruct 3-D surf aces, analyze the nonrigid motion, track the corresponding points in n onrigid motion, and create graphic animation and visualization. The pr oposed method was tested on real range data, on simulated nonrigid mot ion, and on real data of the left ventricular (LV) motion.