I am trying to implement LSB watermarking in matlab.But i am getting the error=> Assignment has more non-singleton rhs dimensions than non-singleton subscripts Error in ==> watermarked_image(ii,jj)=bitset(watermarked_image,1,watermark(ii,jj));

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Urmila 2013-10-4

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https://ww2.mathworks.cn/matlabcentral/answers/89156-i-am-trying-to-implement-lsb-watermarking-in-matlab-but-i-am-getting-the-error-assignment-has-more

评论： Image Analyst 2013-10-7

here is the code=>

clc file1='C:\Users\Public\Pictures\Sample Pictures\Chrysanthemum.jpg'; [cover_image,map]=imread(file1); %imshow(cover_image,map);

file2='C:\Users\Public\Pictures\Sample Pictures\Hydrangeas.jpg'; [message_image]=imread(file2); %imshow(message_image);

message_image=double(message_image); message_image=round(message_image./256); message_image=uint8(message_image);

O=size(cover_image,1) P=size(cover_image,2)

Q=size(message_image,1) R=size(message_image,2)

for ii = 1:O for jj = 1:P watermark(ii,jj)=message_image(mod(ii,Q)+1,mod(jj,R)+1); end end watermark=double(watermark) watermark=round(watermark./256); watermarked_image=cover_image; for ii =1:O for ii= 1:P watermarked_image(ii,jj)=bitset(watermarked_image,1,watermark(ii,jj)); end end

imshow(watermarked_image)

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Urmila 2013-10-5

Can anybody help me please..

Image Analyst 2013-10-5

Like this? http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup

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Answer 1

Image Analyst 2013-10-5

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https://ww2.mathworks.cn/matlabcentral/answers/89156-i-am-trying-to-implement-lsb-watermarking-in-matlab-but-i-am-getting-the-error-assignment-has-more#answer_98712

Chances are you have 3D true color images. So you need to specify a color channel, as in watermark(row, column, colorChannel), not just the row and column, as in watermark(row, column).

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Urmila 2013-10-6

在 MATLAB Online 中打开

Hello sir, according to your solution i tried to modify the code but still getting the same error. so can you tell me whether i have done changes correctly or not.Here is modified code=>

clc
file1='C:\Users\Public\Pictures\Sample Pictures\Chrysanthemum.jpg';
[cover_image,map]=imread(file1)
imshow(cover_image,map); 
file2='C:\Users\Public\Pictures\Sample Pictures\Hydrangeas.jpg';
[message_image]=imread(file2);
imshow(message_image);
 message_image=double(message_image);
 message_image=round(message_image./256);
 message_image=uint8(message_image);    
 O=size(cover_image,1)
 P=size(cover_image,2)
 S=size(cover_image,3)
   Q=size(message_image,1)
   R=size(message_image,2)
   T=size(message_image,3)
   for ii = 1:O
      for jj = 1:P
          for kk=1:S
          watermark(ii,jj,kk)=message_image(mod(ii,Q)+1,mod(jj,R)+1,mod(kk,T)+1);
      end
      end
   end
   watermark=double(watermark);
   watermark=round(watermark./256);
   watermarked_image=cover_image;
   for ii =1:O  
       for jj=1:P 
           for kk=1:S
             watermarked_image(ii,jj,kk)=bitset(watermarked_image,1,watermark(ii,jj,kk));
           end
        end
   end
imshow(watermarked_image)

Urmila 2013-10-7

Hello sir,when i tried to attach the images then i got message =>

You are limited to 10 daily uploads. If you need to upload additional files, delete one or more files now or wait 24 hours to upload more files.

Is it means that i have already attached some images?If yes then why i cant see it?

Image Analyst 2013-10-7

I have no idea. Send an email to files@mathworks.com and ask them.

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I am trying to implement LSB watermarking in matlab.But i am getting the error=> Assignment has more non-singleton rhs dimensions than non-singleton subscripts Error in ==> watermarked_image(ii,jj)=bitset(watermarked_image,1,watermark(ii,jj));

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I am trying to implement LSB watermarking in matlab.But i am getting the error=> Assignment has more non-singleton rhs dimensions than non-singleton subscripts Error in ==> watermarke​d_image(ii​,jj)=bitse​t(watermar​ked_image,​1,watermar​k(ii,jj));

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I am trying to implement LSB watermarking in matlab.But i am getting the error=> Assignment has more non-singleton rhs dimensions than non-singleton subscripts Error in ==> watermarked_image(ii,jj)=bitset(watermarked_image,1,watermark(ii,jj));

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