In many blind image restoration algorithms,non-negativity and support constraints recursive inverse filtering(NAS-RIF) have better effects,but the restoration result is badly worsen and the application is minimized because of the noise amplification.

Freeform surface modeling based on recursive subdivision schemes;

Analyses the disadvantages of reconstruction of surface using the parametric method,discusses the advantage and principle of recursive subdivision scheme,presents the recursive interpolating subdivision scheme for reconstruction of surface and arbitrary topological initial mesh of measured data which is simple and practicable,and a novel effective method for reconstruction of surface .