Title :
A wavelet based adaptive watermarking algorithm
Author :
Ya-fei, Shao ; Guo-wei, Wu ; Xing-gang, Lin
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
Watermarking technology is very important for the security of information delivery in the network age. In this paper, the wavelet transform is used for watermark embedding and detection. Where to watermark and how much the embedding strength is, are all adjusted adaptively to the local image characteristics. The concepts of spread spectrum and fidelity are used here to improve the correlation result during watermark detection and the watermark can be detected without the original signal. The algorithm in this paper fits for many applications in the media delivery area since it is quite robust while retaining the image quality
Keywords :
adaptive codes; copy protection; correlation methods; data encapsulation; image coding; security of data; spread spectrum communication; wavelet transforms; adaptive watermarking algorithm; correlation; digital watermarking; embedding strength; fidelity; local image characteristics; network information delivery; security; spread spectrum; watermark detection; watermark embedding; wavelet transform; Broadcasting; Copyright protection; Energy resolution; Image quality; Image resolution; Robustness; Signal detection; Spatial resolution; Watermarking; Wavelet transforms;
Conference_Titel :
Info-tech and Info-net, 2001. Proceedings. ICII 2001 - Beijing. 2001 International Conferences on
Conference_Location :
Beijing
Print_ISBN :
0-7803-7010-4
DOI :
10.1109/ICII.2001.983087
