Digital watermarking using multiresolution wavelet transform

Der Chyuan Lou*, Jiang Lung Liu, Ming Chang Chang

*Corresponding author for this work

Research output: Contribution to conferenceConference Paperpeer-review

9 Scopus citations


In this paper, a novel technique for digital water-marking of still image based on the concept of wavelet transform is proposed. This algorithm takes advantages of multiresolution signal decomposition to obtain the frequency components of the image. Unlike most previous tree-based wavelet methods that embed a watermark into multiple subbands to enhance the robustness, the proposed method embeds a visually recognizable watermark pattern by modifying the single middle-frequency part of the original image. The experimental results show that the proposed method keeps image fidelity and is robust to common image processing operations, such as JPEG/JPEG 2000 loosy compression, filtering, and incorporating attacks. Some quantitative measures are adopted to objectify performances. Compared with other known watermarking schemes, the proposed method demonstrates its potential for reliable and secure copyright protection technique of multimedia data.

Original languageEnglish
Number of pages8
StatePublished - 2003
Externally publishedYes
EventProceedings: 37th Annual 2003 International Carnahan Conference on Security Technology - Taipei, Taiwan
Duration: 14 10 200316 10 2003


ConferenceProceedings: 37th Annual 2003 International Carnahan Conference on Security Technology


  • Copyright protection
  • Image processing
  • Loosy compression
  • Multimedia
  • Robustness
  • Watermarking
  • Wavelet transform


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