Digital image watermarking algorithm based on CDMA spread spectrum

A multiple watermarking algorithm based on the CDMA spread spectrum technique is presented. Multiple copyright identifiers are convolutional encoded and block interleaved, and the orthogonal gold sequences are used to spread spectrum of the copyright messages. The CDMA encoded copyright messages are embedded into the wavelet sub-bands. As a blind watermarking algorithm, the copyright identifiers are extracted without the original image. The experimental results show that the proposed algorithm improves the detection BER, and the multiple copyright identifiers have preferable robustness and invisibility

[1]  Fang Yan.  DWT-Based CDMA Watermarking Resist Cropping , 2004 .

[2]  Huang Ji-wu.  Image Watermarking Algorithm Applying CDMA , 2003 .

[3]  Tohru Kohda,et al.  Digital watermarking through CDMA channels using spread spectrum techniques , 2000, 2000 IEEE Sixth International Symposium on Spread Spectrum Techniques and Applications. ISSTA 2000. Proceedings (Cat. No.00TH8536).

[4]  Guenole C. M. Silvestre,et al.  Embedding data in digital images using CDMA techniques , 2000, Proceedings 2000 International Conference on Image Processing (Cat. No.00CH37101).

[5]  Thierry Pun,et al.  Rotation, scale and translation invariant spread spectrum digital image watermarking , 1998, Signal Process..

[6]  John D. Villasenor,et al.  Visibility of wavelet quantization noise , 1997, IEEE Transactions on Image Processing.

[7]  Jean-Marc Chassery,et al.  A new CDMA technique for digital image watermarking, enhancing capacity of insertion and robustness , 2001, Proceedings 2001 International Conference on Image Processing (Cat. No.01CH37205).