A hybrid watermarking technique applied to digital images

  • Authors:

  • Zne-Jung Lee;Shih-Wei Lin;Shun-Feng Su;Chun-Yen Lin

  • Affiliations:

  • Department of Information Management, Huafan University, No. 1, Huafan Road, Shihding Township, Taipei County 22301, Taiwan;Department of Information Management, Huafan University, No. 1, Huafan Road, Shihding Township, Taipei County 22301, Taiwan;Department of Electrical Engineering, National Taiwan University of Science and Technology, Taiwan, ROC;Department of Electrical Engineering, National Taiwan University of Science and Technology, Taiwan, ROC

  • Venue:
  • Applied Soft Computing
  • Year:
  • 2008

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Abstract

In this paper, a hybrid watermarking technique applied to digital images is proposed. A watermarking technique is to insert copyright information into digital images that the ownerships can be declared. A fundamental problem for embedding watermarks is that the ways of pursuing transparency and robustness are always trade-off. To solve this problem, a hybrid watermarking technique is proposed to improve the similarity of extracted watermarks. In the proposed technique, the parameters of perceptual lossless ratio (PLR) for two complementary watermark modulations are first derived. Furthermore, a hybrid algorithm based on genetic algorithm (GA) and particle swarm optimization (PSO) is simultaneously performed to find the optimal values of PLR instead of heuristics. From simulation results, it shows the superiority of the proposed hybrid watermarking technique for digital images.