Abstract:

An algorithm is proposed,which uses double-zero-watermarking to solve problems of different digital watermarking algorithms.Firstly,the algorithm takes advantage of the characteristics of the SVD to solve the problem of the high rate of false alarms in existing algorithms.Secondly,according to the low robustness and the limited capacity of the embedded digital watermarking algorithm, a zerowatermarking algorithm based on wavelet transform domain is proposed.The algorithm constructs new data which represent the watermark data by certain keys and wavelet transform coefficients.The original watermark data also carry on the multiple encryptions.The algorithm not only achieves the goal of hiding watermark and protecting copyright,but also greatly improves watermark security. Because the algorithm uses the double-zero-watermarking way,the handled image is not distorted,that is to say,it has good invisibility.Experimental results show that the proposed algorithm is simple and easy, with good robustness and low rate of false alarms.

Key words: zero-watermarking；discrete wavelet transform；SVD；false alarm rate