Title :
An integrated progressive image coding and watermark system
Author :
Wang, Houng-Jyh ; Kuo, C. C Jay
Author_Institution :
Dept. of Electr. Eng. Syst., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
The design of an integrated image coding and watermark system with the wavelet transform is examined in this work. First, the multi-threshold wavelet codec (MTWC) is used to achieve the image compression purpose. Unlike other embedded wavelet coders which use a single initial threshold in their successive approximate quantization (SAQ), MTWC adopts different initial thresholds in different subbands. A superior rate-distortion tradeoff is achieved by MTWC with a low computational complexity. Then, a non-invertible progressive watermark scheme is incorporated in MTWC for copyright protection. This watermark scheme uses the user input data to produce a Gaussian distribution pseudorandom watermark in the wavelet domain. The performance of the proposed watermark technology is supported by experimental results
Keywords :
Gaussian distribution; codecs; computational complexity; copyright; image coding; transform coding; vector quantisation; wavelet transforms; Gaussian distribution pseudorandom watermark; copyright protection; experimental results; image compression; initial thresholds; integrated progressive image coding; low computational complexity; multi-threshold wavelet codec; noninvertible progressive watermark; rate-distortion tradeoff; subbands; successive approximate quantization; user input data; watermark system; wavelet domain; wavelet transform; Codecs; Computational complexity; Copyright protection; Gaussian distribution; Image coding; Quantization; Rate-distortion; Watermarking; Wavelet domain; Wavelet transforms;
Conference_Titel :
Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4428-6
DOI :
10.1109/ICASSP.1998.679692
