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Proceedings Paper

Novel digital watermarking method based on DWT and DCT
Author(s): Hanqiang Cao; Guangxi Zhu; Hongyan Zhao; Xutao Li; Kaining Wu
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Paper Abstract

Digital watermarking has been recently proposed as the mean for property right protection of digital products. In this paper we analyze the self-similarities of wavelet transform and present a new approach to embed a digital watermark into an image based on the qualified significant wavelet trees (QSWT) of discrete wavelet transform of the image for the purpose of protecting the copyright of the image. Our studies have shown that the watermarked image has a good quality of image, and such a watermark is difficult to detect and unchangeable without the appropriate user cryptogram.

Paper Details

Date Published: 28 January 2004
PDF: 8 pages
Proc. SPIE 5208, Mathematics of Data/Image Coding, Compression, and Encryption VI, with Applications, (28 January 2004); doi: 10.1117/12.504087
Show Author Affiliations
Hanqiang Cao, Huazhong Univ. of Science and Technology (China)
Guangxi Zhu, Huazhong Univ. of Science and Technology (China)
Hongyan Zhao, Huazhong Univ. of Science and Technology (China)
Xutao Li, Huazhong Univ. of Science and Technology (China)
Kaining Wu, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 5208:
Mathematics of Data/Image Coding, Compression, and Encryption VI, with Applications
Mark S. Schmalz, Editor(s)

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