Image Registration via Particle Movement

Though fluid model offers a good approach to nonrigid registration with large deformations, it suffers from the blurring artifacts introduced by the viscosity term. To overcome this drawback, we present an inviscid model expressed in a particle framework. Our idea is to simulate the template image as a set of particles moving towards the target positions. The proposed model can accommodate both small and large deformations with sharp edges and reasonable displacement maps achieved. Because of its simplicity, the computational cost is much smaller than other nonrigid registration approaches.