matlab.rar_SVD coding in matlab_svd video matlab_分块pca_分块奇异值_更新P

s=imread('G:\毕业设计\panfeng\边缘\Lena.tif'); [m,n]=size(s); num=m*n; r=zeros(1,512); e=zeros(1,512); d=zeros(size(s)); for i=1:m for j=1:n r(s(i,j)+1)=r(s(i,j)+1)+1; %原图像概率密度 end end r=r./num; for i=1:m for j=1:i e(i)=e(i)+r(j); %累积分布 end end for i=1:256 e(i)=floor(e(i)*255+0.5); %映射关系 end for i=1:m for j=1:n d(i,j)=e(s(i,j)+1); end end s=uint8(s); d=uint8(d); subplot(2,2,1); imshow(s); title('source'); subplot(2,2,2); imhist(s); title('histogram of source'); subplot(2,2,3); imshow(d); title('dest'); subplot(2,2,4); imhist(d); title('histogram of dest');