Frost 滤波器代码，一个印度人仿真的V.S Frost 于1982年提出的Frost 滤波器，参考文献A Model for Radar Images and Its Application to Adaptive Digital -Frost_filter code　Simulated by　an Indian　　References VS Frost, " A Model for Radar Images and Its Application to Adaptive　Digital Filtering of Multiplicative Noise,"　IEEE Trans Pattern Anal,　Machine Intell.. ., vol. 4, no. 2, pp. 157-166,. 1982.　Mar [http://dx.doi.org/10.1109/TPAMI.1982.4767223]