Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A Wavelet Transform based Watermarking for Digital Signatures

  • Oh, Sang-Heun (Department of Electrical and computer Engineering, Sungkyunkwan Univ) ;
  • Lee, Hee-Sup (Department of Electrical and computer Engineering, Sungkyunkwan Univ) ;
  • Lee, Keun-Young (Department of Electrical and computer Engineering, Sungkyunkwan Univ)
  • Published : 2000.07.01
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Abstract

This paper presents a new watermarking method based on wavelet transform. Embedding algorithm call define robust area by varying thresholds and gives a watermark image the priority of significance by analyzing spatial correlation of the watermark image. Detector can adjust thresholds to the distorted watermarked image. Also detector can extract the embedded data without an original image. A new measurement for detecting the correct watermark is suggested. Simulation results show that the embedded watermark is robust against various signal processing and compression attacks.

Keywords