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function Untitled2

clear all;

clc;

%保存开始时间

start_time=cputime;

figure(1);

%读出原始图像

subplot(1,2,1);

input=imread('image.bmp');

imshow(input);

title('原始图像');

%读出水印

subplot(1,2,2);

water=imread('water1.bmp');

imshow(water);

title('水印');

%三色分离

input=double(input);

water=double(water);

inputr=input(:,:,1);

waterr=water(:,:,1);

inputg=input(:,:,2);

waterg=water(:,:,2);

inputb=double(input(:,:,3));

waterb=double(water(:,:,3));

r=0.06;

%水印R的分解

[Cwr,Swr]=wavedec2(waterr,1,'haar');

%图像R的分解

[Cr,Sr]=wavedec2(inputr,2,'haar');

%水印的嵌入

Cr(1:size(Cwr,2)/16)=Cr(1:size(Cwr,2)/16)+r*Cwr(1:size(Cwr,2)/16);

k=0;

while k<=size(Cr,2)/size(Cwr,2)-1

Cr(1+size(Cr,2)/4+k*size(Cwr,2)/4:size(Cr,2)/4+(k+1)*size(Cwr,2)/4)=Cr(1+size(Cr,2)/4+k*size(Cwr,2)/4:size(Cr,2)/4+(k+1)*size(Cwr,2)/4)+r*Cwr(1+size(Cwr,2)/4:size(Cwr,2)/2);

Cr(1+size(Cr,2)/2+k*size(Cwr,2)/4:size(Cr,2)/2+(k+1)*size(Cwr,2)/4)=Cr(1+size(Cr,2)/2+k*size(Cwr,2)/4:size(Cr,2)/2+(k+1)*size(Cwr,2)/4)+r*Cwr(1+size(Cwr,2)/2:3*size(Cwr,2)/4);

Cr(1+3*size(Cr,2)/4+k*size(Cwr,2)/4:3*size(Cr,2)/4+(k+1)*size(Cwr,2)/4)=Cr(1+3*size(Cr,2)/4+k*size(Cwr,2)/4:3*size(Cr,2)/4+(k+1)*size(Cwr,2)/4)+r*Cwr(1+3*size(Cwr,2)/4:size(Cwr,2));

k=k+1;

end;

Cr(1:size(Cwr,2)/4)=Cr(1:size(Cwr,2)/4)+r*Cwr(1:size(Cwr,2)/4);

g=0.03;

[Cwg,Swg]=wavedec2(waterg,1,'haar');

[Cg,Sg]=wavedec2(inputg,2,'haar');

Cg(1:size(Cwg,2)/16)=Cg(1:size(Cwg,2)/16)+g*Cwg(1:size(Cwg,2)/16);

k=0;

while k<=size(Cg,2)/size(Cwg,2)-1

Cg(1+size(Cg,2)/4+k*size(Cwg,2)/4:size(Cg,2)/4+(k+1)*size(Cwg,2)/4)=Cg(1+size(Cg,2)/4+k*size(Cwg,2)/4:size(Cg,2)/4+(k+1)*size(Cwg,2)/4)+g*Cwg(1+size(Cwg,2)/4:size(Cwg,2)/2);

Cg(1+size(Cg,2)/2+k*size(Cwg,2)/4:size(Cg,2)/2+(k+1)*size(Cwg,2)/4)=Cg(1+size(Cg,2)/2+k*size(Cwg,2)/4:size(Cg,2)/2+(k+1)*size(Cwg,2)/4)+g*Cwg(1+size(Cwg,2)/2:3*size(Cwg,2)/4);

Cg(1+3*size(Cg,2)/4+k*size(Cwg,2)/4:3*size(Cg,2)/4+(k+1)*size(Cwg,2)/4)=Cg(1+3*size(Cg,2)/4+k*size(Cwg,2)/4:3*size(Cg,2)/4+(k+1)*size(Cwg,2)/4)+g*Cwg(1+3*size(Cwg,2)/4:size(Cwg,2));

k=k+1;

end;

Cg(1:size(Cwg,2)/4)=Cg(1:size(Cwg,2)/4)+g*Cwg(1:size(Cwg,2)/4);

b=0.12;

[Cwb,Swb]=wavedec2(waterb,1,'haar');

[Cb,Sb]=wavedec2(inputb,2,'haar');

Cb(1:size(Cwb,2)/16)=Cb(1:size(Cwb,2)/16)+b*Cwb(1:size(Cwb,2)/16);

k=0;

while k<=size(Cb,2)/size(Cwb,2)-1

Cb(1+size(Cb,2)/4+k*size(Cwb,2)/4:size(Cb,2)/4+(k+1)*size(Cwb,2)/4)=Cb(1+size(Cb,2)/4+k*size(Cwb,2)/4:size(Cb,2)/4+(k+1)*size(Cwb,2)/4)+b*Cwb(1+size(Cwb,2)/4:size(Cwb,2)/2);

Cb(1+size(Cb,2)/2+k*size(Cwb,2)/4:size(Cb,2)/2+(k+1)*size(Cwb,2)/4)=Cb(1+size(Cb,2)/2+k*size(Cwb,2)/4:size(Cb,2)/2+(k+1)*size(Cwb,2)/4)+b*Cwb(1+size(Cwb,2)/2:3*size(Cwb,2)/4);

Cb(1+3*size(Cb,2)/4+k*size(Cwb,2)/4:3*size(Cb,2)/4+(k+1)*size(Cwb,2)/4)=Cb(1+3*size(Cb,2)/4+k*size(Cwb,2)/4:3*size(Cb,2)/4+(k+1)*size(Cwb,2)/4)+b*Cwb(1+3*size(Cwb,2)/4:size(Cwb,2));

k=k+1;

end;

Cb(1:size(Cwb,2)/4)=Cb(1:size(Cwb,2)/4)+b*Cwb(1:size(Cwb,2)/4);

inputr=waverec2(Cr,Sr,'haar');

inputg=waverec2(Cg,Sg,'haar');

inputb=waverec2(Cb,Sb,'haar');

temp=size(inputr);

pic=zeros(temp(1),temp(2),3);

for i=1:temp(1);

for j=1:temp(2);

pic(i,j,1)=inputr(i,j);

pic(i,j,2)=inputg(i,j);

pic(i,j,3)=inputb(i,j);

end

end

output=uint8(round(pic));

watermarked_image_uint8=uint8(output);

imwrite(watermarked_image_uint8,'watermarked.bmp','bmp');

elapsed_time=cputime-start_time,

figure(2);

imshow(watermarked_image_uint8);

title('水印图像');