Open AccessWavelet transform based watermark for digital images
Author(s) -
Xiang Gen Xia,
Charles G. Boncelet,
Gonzalo R. Arce
Publication year - 1998
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.3.000497
Subject(s) - discrete wavelet transform , artificial intelligence , computer vision , wavelet , wavelet transform , computer science , stationary wavelet transform , watermark , second generation wavelet transform , image compression , harmonic wavelet transform , digital watermarking , image processing , image (mathematics) , pattern recognition (psychology)
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.