Title :
Digital Watermarking of Natural Images Based on LPTV Filters
Author :
Martin, V. ; Chabert, M. ; Lacaze, B.
Author_Institution :
ENSEEIHT, Nat. Polytech Inst. of Toulouse
Abstract :
In this paper, linear periodically time varying (LPTV) filters are used as an alternative to direct sequence modulation in spread spectrum watermarking techniques. Due to their periodicity, LPTV filters combined with a Peano-Hilbert scan in the spatial domain of natural images offer good decoding performance. Specific LPTV filters are proposed to reject the low-pass host noise and to shape the watermark spectrum. Extensions to improved spread spectrum and quantization in a subspace projection are also investigated.
Keywords :
image coding; image denoising; modulation; time-varying filters; watermarking; LPTV filters; Peano-Hilbert scan; digital watermarking; direct sequence modulation; linear periodically time varying filters; low-pass host noise rejection; natural images; spread spectrum watermarking techniques; subspace projection; Additive white noise; Decoding; Digital filters; Interference; Noise robustness; Nonlinear filters; Pulse modulation; Quantization; Spread spectrum communication; Watermarking; Image processing; Spread spectrum communication;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2007. ICASSP 2007. IEEE International Conference on
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0727-3
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2007.366206
