DB Wavelet                         WatermarkCopyright©2010 CompanynameFree template by Investintech PDF Solutions
What does dmg do?    % Damga uretme    %    % imgew: Damga imgesi    % imge1: Orjinal imge    %    function W=dmg(imgew,im...
Adding WatermarkWavelet transform of image and                        Adding the watermark energy towatermark             ...
ResultsCopyright©2010 CompanynameFree template by Investintech PDF Solutions
After subtracting to see that                                watermark cannot be seenCopyright©2010 CompanynameFree templa...
Detecting watermarkCopyright©2010 CompanynameFree template by Investintech PDF Solutions
Trying the fruit imageCopyright©2010 CompanynameFree template by Investintech PDF Solutions
Watermark EmbeddedCopyright©2010 CompanynameFree template by Investintech PDF Solutions
Detecting Watermark                                                         • As you see                                  ...
Using Haar                 WaveletCopyright©2010 CompanynameFree template by Investintech PDF Solutions
Using Haar WaveletCopyright©2010 CompanynameFree template by Investintech PDF Solutions
Watermark embedded in certain                                   locationsCopyright©2010 CompanynameFree template by Invest...
• As you can see the                                                   watermark is                                       ...
Scrambling image by ArnoldCopyright©2010 CompanynameFree template by Investintech PDF Solutions
Copyright©2010 CompanynameFree template by Investintech PDF Solutions
Baboon original                                              Histogram of images                                          ...
Images Output Result                                                               Baboon                                 ...
Wavelet watermark
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Wavelet watermark

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Image Watermark using Wavelet

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Wavelet watermark

  1. 1. DB Wavelet WatermarkCopyright©2010 CompanynameFree template by Investintech PDF Solutions
  2. 2. What does dmg do? % Damga uretme % % imgew: Damga imgesi % imge1: Orjinal imge % function W=dmg(imgew,imge1); [w h]=size(imgew); [w1 h1]=size(imge1); a=1; b=1; W=zeros(size(imge1)); for i=1:w:w1 for j=1:h:h1 W(i:a*w,j:b*h)=imgew; b=b+1; end a=a+1; b=1; end W=W;Copyright©2010 CompanynameFree template by Investintech PDF Solutions
  3. 3. Adding WatermarkWavelet transform of image and Adding the watermark energy towatermark the original image function [D]=blockdwt2(A,W); % Adding watermark image. [row,col]=size(A); for i=1:h for j=1:w Tr=250; if ca(i,j)>Tr k=0.02; Ca(i,j)=ca(i,j)+k*W(i,j); % <-------- k*abs(double(c1(i,j)))*W(i,j); de olabilir [ca,ch,cv,cd] = dwt2(A,db1); else c1 = [ch cv cd]; Ca(i,j)=ca(i,j); end [h, w] = size(ca); end [m, n] = size(c1); end W=dmg(W,A); [caa chh cvv cdd]=dwt2(W,db1); W=caa; size(W);Copyright©2010 CompanynameFree template by Investintech PDF Solutions
  4. 4. ResultsCopyright©2010 CompanynameFree template by Investintech PDF Solutions
  5. 5. After subtracting to see that watermark cannot be seenCopyright©2010 CompanynameFree template by Investintech PDF Solutions
  6. 6. Detecting watermarkCopyright©2010 CompanynameFree template by Investintech PDF Solutions
  7. 7. Trying the fruit imageCopyright©2010 CompanynameFree template by Investintech PDF Solutions
  8. 8. Watermark EmbeddedCopyright©2010 CompanynameFree template by Investintech PDF Solutions
  9. 9. Detecting Watermark • As you see Watermark was not embedded in all the imageCopyright©2010 CompanynameFree template by Investintech PDF Solutions
  10. 10. Using Haar WaveletCopyright©2010 CompanynameFree template by Investintech PDF Solutions
  11. 11. Using Haar WaveletCopyright©2010 CompanynameFree template by Investintech PDF Solutions
  12. 12. Watermark embedded in certain locationsCopyright©2010 CompanynameFree template by Investintech PDF Solutions
  13. 13. • As you can see the watermark is available in several locationsCopyright©2010 CompanynameFree template by Investintech PDF Solutions
  14. 14. Scrambling image by ArnoldCopyright©2010 CompanynameFree template by Investintech PDF Solutions
  15. 15. Copyright©2010 CompanynameFree template by Investintech PDF Solutions
  16. 16. Baboon original Histogram of images Baboon image Watermarked imageCopyright©2010 CompanynameFree template by Investintech PDF Solutions
  17. 17. Images Output Result Baboon Watermarked imageCopyright©2010 CompanynameFree template by Investintech PDF Solutions

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