%讀入水印圖象，并置亂


%讀入水印圖象
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);
%將二維m×n圖象矩陣轉換為一維
ww=1;
for i=1:64
    for j=1:64
        watermark2(ww)=waterimage(i,j);
        ww=ww+1;
    end
end


miyao=ones(1,12);%置亂的密鑰，長為12，
watermark2=zhiluan(watermark2,miyao);%對水印序列進行置亂，watermark2為置亂后的水印序列
watermark_length=length(watermark2);

t=1;%t為水印嵌入的遍數(shù)，t＝2表示水印重復嵌入2遍
for i=1:t
    water_mark(((i-1)*watermark_length)+(1:watermark_length))=watermark2;
end
water_mark_length=length(water_mark);