Title :
Wavelet-based digital watermarking with halftoning technique
Author :
Leung, K.H. ; Zeng, Bing
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon, China
Abstract :
In this paper, we present a watermarking scheme using the halftone technique to embed gray scale logo images as watermark signals. To embed the watermark, the gray scale logo image first undergoes a halftoning process to become a 1-bit image before embedding. Direct spread spectrum is used to insert the watermark signal into the original image. The robustness and invisibility of the proposed scheme are determined by the chip-rate and another parameter. The method is proved to be robust to different signal processing techniques
Keywords :
copy protection; image coding; message authentication; quantisation (signal); wavelet transforms; direct spread spectrum; gray scale logo images; halftoning technique; logo image embedding; watermark signal insertion; wavelet-based digital watermarking; Copyright protection; Digital images; Frequency domain analysis; Internet; Kernel; Robustness; Spread spectrum communication; Video signal processing; Watermarking; Wavelet coefficients;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.922028
