A Zero-watermark Algorithm Based on Matrix Norm
Zheng Wang · Microprocessors · 2009
In this paper,We propose a zero-watermark algorithm based on matrix norm.First the original host image will be decomposed by multi-resolution wavelet transforming.The low-frequency detail of sub-band is chosen to divide into some reasonable blocks and calculate the matrix norm of each block.Then we make use of the logical Operational between norm matrix and the original watermark information to construct copyright protection signs.The experimental prove that algorithm not only solves the conflict of the watermark robust property and invisible property very well but also greatly reduce the complexity of calculating.