A "Small Leakage" Model for Diffusion Smoothing of Image Data

In this paper, an implicit numerical scheme of diffusion smoothing is given for both intensity and depth images, which uses a changeable time step to reduce the computation. Emphasised is a "small leakage" diffusion model as an efficient way to maintain both boundary position and curvature signs along the surface boundary in smoothing, which wi l l be useful for approximation and segmentation of sculptured surfaces.