Department of EEE, Sri Venkateswara University College of Engineering, Tirupati (A.P.), India.
In this paper robust blind watermarking algorithm using decimal sequences is presented. Like other pseudorandom sequences, decimal sequences (d-sequence) may be used in designing a code division multiple access (CDMA) system. The advantage of using d-sequence over PN sequence is that one can select the required sequence, because the d-sequence is generated from a prime number which is of our choice. This shows the flexibility of the system. The operation of embedding and extraction using correlation of the watermark is done in the frequency domain. The proposed watermarking algorithm is more robust, since it can with stand to many attacks including compression and filtering. Experimental results are evaluated with CORRELATION, PSNR and WPSNR.
Correlation based Watermarking, D-Sequences, Prime numbers
