W.W.L. Fung, Digital Syst. Res. Center, Sanyo Electr. Co. Ltd., Tokyo, Japan
A. Kunisa, Digital Syst. Res. Center, Sanyo Electr. Co. Ltd., Tokyo, Japan
This paper proposes an RST-invariant multi-bit watermarking system based on LPM and DFT. This system embeds the watermark in a rotation and translation invariant domain obtained by first acquiring log-polar mapped DFT (LPM-DFT) magnitudes of an image, and then taking the magnitude of the 1-dimensional DFT along the angular axis of these LPM-DFT magnitudes. Neither the original cover image nor a presumed watermark is required during watermark extraction. Scaling invariant is accomplished by a simple search along the log-radius axis. Simulation results indicate that this new system has high robustness against RST distortion and moderate robustness against image compression such as JPEG.
Index Terms:
image compression, rotation-scaling-translation, RST-invariant multibit watermarking, log-polar mapping, discrete Fourier transform, LPM-DFT magnitude, watermark extraction, log-radius axis
Citation:
W.W.L. Fung, A. Kunisa, "Rotation, scaling, and translation-invariant multi-bit watermarking based on log-polar mapping and discrete Fourier transform," icme, pp.4 pp., 2005 IEEE International Conference on Multimedia and Expo, 2005
PURCHASE ARTICLE: $19
IEEE Xplore Subscribers
Digg
Furl
Spurl
Blink
Simpy
Google
Del.icio.us
Y!MyWeb