In many reasons of causing image quality degraded

disturb and influence of noise source are important reason of causing image quality degraded. It is necessary that removing noise for improving image quality. At the same time

It should not be damaged that the edge and detail of image to the best of our abilities. In this paper

aim at the problem that omni directional multistage combination filter fuzz the edge of image while removing noise

the reason of causing this problem is analyzed and another advanced omni directional multistage combinative algorithm is proposed. It is pointed out that should take the special cases of corner lines tread into account for solving the problem. The algorithm proposed can preserve the edge of image very well when removing noise. The result of experiment shows that this filter can preserve much more edge information of image when removing noise and achieve better effect.