Research Article
A zero-watermark system based on combined spatial and wavelet domains
@INPROCEEDINGS{10.1109/CHINACOM.2008.4685181, author={RU GUANYING and YANG SHOUYI and MU XIAOMIN and CHEN ENQING}, title={A zero-watermark system based on combined spatial and wavelet domains}, proceedings={3rd International ICST Conference on Communication and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2008}, month={11}, keywords={}, doi={10.1109/CHINACOM.2008.4685181} }- RU GUANYING
YANG SHOUYI
MU XIAOMIN
CHEN ENQING
Year: 2008
A zero-watermark system based on combined spatial and wavelet domains
CHINACOM
IEEE
DOI: 10.1109/CHINACOM.2008.4685181
Abstract
To protect the copyright of digital images efficiently, while not degrade its quality, this paper proposed a dual-domain zero-watermark algorithm, which increases the flexibility and robustness of single domain method. This algorithm embeds the zero-watermark in the highest bit planes of spatial domain and wavelet domains low frequency sub-image simultaneously, based on content's importance. Experimental results show that this method has good safety and strong robustness. However, all zero-watermark algorithms produce large sideband information which brings forth great challenges to the application of zero-watermark. Hence the paper analyzes the sideband information produced in embedding process and points out that different keys have different significance, which provide the theory bases to key compression and grade management.