Wavelet transform based watermark for digital images

被引：99
|
作者：
Xia, XG [1 ]
Boncelet, CG [1 ]
Arce, GR [1 ]
机构：
[1] Univ Delaware, Dept Elect & Comp Engn, Newark, DE 19716 USA
来源：
OPTICS EXPRESS | 1998年 / 3卷 / 12期
关键词：
D O I：
10.1364/OE.3.000497
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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. (C) 1998 Optical Society of America.
引用
收藏
页码：497 / 511
页数：15
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