?? image_read.m
字號:
%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(zhuǎn)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,
watermark3=zhiluan(watermark2,miyao);%對水印序列進(jìn)行置亂,watermark3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(fù)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);
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