Abstract

In this paper, we introduce a new multiresolution watermarking method for digital images. The method is based on the discrete wavelet transform (DWT). Pseudo-random codes are added to the large coefficients at the high and middle frequency bands of the DWT of an image. It is shown that this method is more robust to proposed methods to some common image distortions, such as the wavelet transform based image compression, image rescaling/stretching and image halftoning. Moreover, the method is hierarchical.

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History
Original Manuscript: October 28, 1998
Published: December 7, 1998

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Author Affiliations

Xiang Gen Xia, Charles Boncelet, Gonzalo Arce

Univ. of Delaware

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