Improved Pixel-Wise Masking for Image Watermarking

  • Corina Nafornita
  • Alexandru Isar
  • Monica Borda
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4105)


Perceptual watermarking in the wavelet domain has been proposed for a blind spread spectrum technique, taking into account the noise sensitivity, texture and the luminance content of all the image subbands. In this paper, we propose a modified perceptual mask that models the human visual system behavior in a better way. The texture content is appreciated with the aid of the local standard deviation of the original image, which is further compressed in the wavelet domain. Since the approximation image of the last level contains too little information, we choose to appreciate the luminance content using a higher resolution level approximation subimage. The effectiveness of the new perceptual mask is appreciated by comparison with the old watermarking system.


Watermark Image Host Image JPEG Compression Wavelet Domain Quantization Step 
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  1. 1.
    Cox, I., Miller, M., Bloom, J.: Digital Watermarking. Morgan Kaufmann Publishers, San Francisco (2002)Google Scholar
  2. 2.
    Barni, M., Bartolini, F., Piva, A.: Improved wavelet-based watermarking through pixel-wise masking. IEEE Trans. on Image Processing 10(5), 783–791 (2001)zbMATHCrossRefGoogle Scholar
  3. 3.
    Nafornita, C., Isar, A., Borda, M.: Image Watermarking Based on the Discrete Wavelet Transform Statistical Characteristics. In: Proc. IEEE Int. Conf. EUROCON, Belgrade, Serbia & Montenegro, pp. 943–946 (November 2005)Google Scholar
  4. 4.
    Kundur, D.: Water-filling for Watermarking? In: Proc. IEEE Int. Conf. On Multimedia and Expo., New York City, pp. 1287–1290 (August 2000)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Corina Nafornita
    • 1
  • Alexandru Isar
    • 1
  • Monica Borda
    • 2
  1. 1.Communications DepartmentPolitehnica University of TimisoaraTimisoaraRomania
  2. 2.Communications DepartmentTechnical University of Cluj-NapocaCluj-NapocaRomania

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