image_read.m

来自「一些程序」· M 代码 · 共 32 行

%读入水印图象，并置乱


%读入水印图象
image_name='D:\wav\水印.bmp';
watermark_image=imread(image_name);
waterimage=double(watermark_image);
waterimage_m=size(waterimage,1);
waterimage_n=size(waterimage,2);
%将二维m×n图象矩阵转换为一维
ww=1;
for i=1:64
    for j=1:64
        watermark2(ww)=waterimage(i,j);
        ww=ww+1;
    end
end


miyao=ones(1,12);%置乱的密钥，长为12，
watermark3=zhiluan(watermark2,miyao);%对水印序列进行置乱，watermark3为置乱后的水印序列
watermark_length=length(watermark2);

t=1;%t为水印嵌入的遍数，t＝2表示水印重复嵌入2遍
for i=1:t
    water_mark(((i-1)*watermark_length)+(1:watermark_length))=watermark3;
end
water_mark_length=length(water_mark);