swyzmde 发表于 2006-10-24 21:58

执行时,提示Error: Missing variable or function.请问是什么原因.

clear;
%装入原图像1
load woman;
I=X;

%小波函数
type = 'db1';

% 2维离散Daubechies小波变换
= dwt2(I,type);
C1 = ;

%系数矩阵大小
= size(CA1);
= size(C1);

% 定义阈值T1
T1 =50;
alpha = 0.2;

%在图像中加入水印
for counter2 = 1: 1: N1
   for counter1 = 1: 1: M1
      if( C1(counter1, counter2) > T1 )   
         marked1(counter1,counter2) = randn(1,1);
         NEWC1(counter1, counter2) = double( C1(counter1, counter2) ) +…
alpha * abs( double( C1(counter1, counter2) ) ) * marked1(counter1,counter2) ;      
      else
         marked1(counter1, counter2) = 0;
         NEWC1(counter1, counter2) = double( C1(counter1, counter2) );
      end;
   end;
end;

%重构图像
NEWCH1 = NEWC1(1:length1, 1:width1);
NEWCV1 = NEWC1(1:length1, width1+1:2*width1);
NEWCD1 = NEWC1(1:length1, 2*width1+1:3*width1);

R1 = double( idwt2(CA1, NEWCH1, NEWCV1, NEWCD1, type) );

%分离水印
watermark1 = double(R1) - double(I);

figure(1);
subplot(1,2,1);
image(I);
axis('square');
title('原始图像');
subplot(1,2,2);
imshow(R1/250);
axis('square');
title('Daubechies小波变换后图像');

figure(2);
imshow(watermark1*10^16);
axis('square');
title('水印图像');

% 水印检测
newmarked1 = reshape(marked1, M1*N1, 1);
% 检测阈值
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;

% 计算阈值
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('原始的加水印图像');
xlabel('水印');
ylabel('检测响应');
执行时,提示Error: Missing variable or function.请问是什么原因.

jimin 发表于 2006-10-24 22:10

NEWC1(counter1, counter2) = double( C1(counter1, counter2) ) +…
alpha * abs( double( C1(counter1, counter2) ) ) * marked1(counter1,counter2) ;   
改为
NEWC1(counter1, counter2) = double( C1(counter1, counter2) ) …
+alpha * abs( double( C1(counter1, counter2) ) ) * marked1(counter1,counter2) ;

swyzmde 发表于 2006-10-24 22:20

还是不行啊

jimin 发表于 2006-10-24 22:26

我是可以运行的
另外m文件命名不要用中文

jimin 发表于 2006-10-24 22:27

第3个图

jimin 发表于 2006-10-24 22:32

再把m文件也传上吧，再不行我就没办法了

swyzmde 发表于 2006-10-24 22:35

这次可以了,万分感谢你
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