Regarding ramp edge and step edge as the measurement of image information, the image information change law with the scale parameter is first studied. Then a new adaptive algorithm of scale parameter with the module of visual characters is proposed. The information of the image is uniformly distributed among every layer in this algorithm. The method can avoid the problem of complicated computation or over-distortion due to losing too much key information. The experimental results show that the algorithm can suppress the noise effectively and provide the basis for ...
