cliptest.m

来自「关于半色调编码计算全息图的信息隐藏Matlab程序的说明： 算法实现主程」· M 代码 · 共 17 行

clc
clear
Bholo=imread('Bholo.bmp');
M=1600
Bholo(1025-M/2:1024+M/2,1025-M/2:1024+M/2)=zeros(M);
Fholo=log(1+abs(fftshift(fft2(double(Bholo)))));
%figure(1)
% imshow(mat2gray(Bholo));
imwrite(Bholo,'Bholo1600.bmp');
%figure(2)
% imwrite(mat2gray(log(1+abs(fftshift(fft2(Bholo))))),'mark.bmp')
%imshow(mat2gray(Fholo));
CFholo=Fholo(897:1152,897:1152);
imwrite(mat2gray(CFholo),'robust1600.bmp');
%figure(3)
%imshow(mat2gray(CFholo));