DEFORMABLE OBJECT RECONSTRUCTION WITH PARTICLE-SYSTEMS

In this paper, we describe a general method for reconstruction and ani mation of volumetric deformable objects. First, the initial data, defi ned by planar contours, are fitted with a closed periodic parametric s urface. Then, this rigid model is used as a closed boundary, which is filled in with particles. For this, new particles are progressively ge nerated within the boundary. When a new particle is introduced, there will be an interaction between this particle and all the existing part icles. They will also collide the boundaries. Then we let the system e volve under physically-based forces, until the particles reach an equi librium state. We have defined some simple rules for the new particle generation. In the scope of a medical application, we want to simulate the motion and the form alteration of the internal anatomical organs. Hence we have introduced the necessary tools to handle the dynamic an d deformable behavior of cancerous organs. (C) 1998 Elsevier Science L td. All rights reserved.