Two-step detection algorithm in a HVS-based blind watermarking of still images

Authors:
Yong C. Kim;Byeong C. Choi
Affiliations:
Dept. of ECE, Univ. of Seoul, Seoul, Korea;ETRI, Daejeon, Korea
Venue:
IWDW'02 Proceedings of the 1st international conference on Digital watermarking
Year:
2002

Citing 7
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Abstract

A good watermark is known to be perceptually invisible, undetectable without key and robust to spatial/temporal data modification. In this paper, we utilize the characteristics of the human visual system (HVS) for watermarking. In HVS, the response of visual cortex decomposes the image spectra into perceptual channels that are octave bands in spatial frequency. Based on the octave-bands division, same numbers of bits of the watermark are inserted into each channel. Experimental results show that the proposed method based on HVS method gives strong robustness to the attacks compared with conventional DCT, wavelet and DFT watermarking methods.