Title :
Implementation of digital watermarking system
Author :
Chung, Yuk Ying ; Wong, Man To
Author_Institution :
Sch. of Inf. Technol., Sydney Univ., NSW, Australia
Abstract :
It is easy to make perfect unauthorised copies on a large scale in the music, film, book and software publishing industries. A digital watermark - a hidden copyright message with hidden serial numbers-can be used as a direct method of preventing unauthorised copying. This paper presents a novel digital watermarking system based on vector quantisation (VQ) and discrete cosine transform (DCT), which can embed a grey level image. The proposed new system can embed 16 times more information than other traditional DCT based watermarking system. The recovered images have high peak signal to noise ratio (PSNR) value and good visual quality. This system is robust in terms of both JPEG compression and other signal processing attacks.
Keywords :
copyright; discrete cosine transforms; image coding; transform coding; vector quantisation; watermarking; DCT; JPEG compression attacks; PSNR; VQ; binary digital images; book publishing industry; copyright protection; digital watermarking system; film industry; grey level image; music industry; peak signal to noise ratio; signal processing attacks; software publishing industry; unauthorised copies; visual quality; Books; Computer industry; Discrete cosine transforms; Large-scale systems; Noise robustness; PSNR; Publishing; Transform coding; Vector quantization; Watermarking;
Conference_Titel :
Consumer Electronics, 2003. ICCE. 2003 IEEE International Conference on
Print_ISBN :
0-7803-7721-4
DOI :
10.1109/ICCE.2003.1218891
