A=imread('heat.jpg'); %读取图像（已经存到当前文件夹)A1=double(A(:,:,1));A2=double(A(:,:,2));A3=double(A(:,:,3)); %rgb3通道转为double类型[m n]=size(A1);[t r]=meshgrid(linspace(-pi,pi,n),1:m); %原图坐标M=2*m;N=2*n;[NN MM]=meshgrid((1:N)-n...