clear;
load mis
I=X;
type='db1';
[CA1,CH1,CV1,CD1]=DWT2(I,type);
C1=[CH1 CV1 CD1];
[length1,width1]=size(CA1);
[M1,N1]=size(C1);
T1=50;
alpha=0.2;
for counter2 =1:1:N1
for counter1=1:1:M1
if (C1(counter1,counter2)>T1)
marked(counter1,counter2)=randn(1,1);
NEWC1(counter1,counter2)=double(C1(counter1,counter2))+...
alpha*abs(double(C1(counter1,counter2)))*marked1(counter1,counter2);
else
marked(counter1,counter2)=0;
NEWC1(counter1,counter2)=double(C1(counter1,counter2));
end;
end;
end;
NEWCH1=NEWC1(1:lenght1,1:width1);
NEWCV1=NEWC1(1:lenght1,width1+1:2*width1);
NEWCD1=NEWC1(1:lenght1,2*width1+1:3*width1);
R1=double(idwt2(CA1,NEWCH1,NEWCV1,NEWCD1,type));
watermark1=double(R1)-double(I);
figure(1);
subplot(1,2,1);
image(I);
axis('square');
title('yuanshituxiang');
subplot(1,2,2);
imshow(R1/250);
axis('square');
title('xiaobobianhuanghoudetuxiang');
figure(2);
imshow(watermark1*10^16);
axis('square');
title('shuiyintuxiang');
newmarked1=reshape(marked1,M1*N1,1);
T2=60;
for counter2=1:1:N1
for counter1=1:1:M1
if(NEWC1(counter1,counter2)>T2)
NEWC1X(counter1,counter2)=NEWC1(counter1,counter2);
else
NEWC1X(counter1,counter2)=0;
end;
end;
end;
NEWC1X=reshape(NEWC1X,M1*N1,1);
correlation1=zeros(1000,1);
for corrcounter=1:1:1000
if (corrcounter==500)
correlation1(corrcounter,1)=NEWC1X'*newmarked1/(M1*N1);
else
rnmark=randn(M1*N1,1);
correlation1(corrcounter,1)=NEWC1X'*rnmark/(M1*N1);
end;
end;
originalthreshold=0;
for counter2=1:1:N1
for counter1=1:1:M1
if(NEWC1(counter1,counter2)>T2)
originalthreshold=originalthreshold+abs(NEWC1(counter1,counter2));
end;
end;
end;
originalthreshold=originalthreshold*alpha/(2*M1*N1);
corrcounter=1000;
originalthresholdvector=ones(corrcounter,1)*originalthreshold;
figure(3);
plot(correlation1,'-');
hold on;
plot(originalthresholdvector,'-');
title('yuanshidejiashuiyindetuxiang');
xlabel('shuiyin');
ylabel('jiancexiangying');
运行出来说第二句有问题，应该怎么改，还有图像应该放在那里？mis是一幅图
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