小波变换-软硬阈值半软阈值图像去噪matlab程序-2页.doc

%软阈值 硬阈值 半软阈值 巴特沃斯滤波clcclose allclear all map=gray(256); x=imread(hzw.jpg); x=rgb2gray(x);subplot(2,3,1);image(x); colormap(map); title(原始图片);axis square; init=2055615866; randn(seed,init);x1=50.*randn(size(x); %均值为0 方差502 x=double(x)nx=x+x1;subplot(2,3,2);image(nx);colormap(map);title(加噪后的图片);axis square;c=num2str(c);text(100,100,PSNR:);text(300,100,c); %硬阈值thr,sorh,keepapp=ddencmp(den,wv,