DocumentCode :
1559146
Title :
A vision-based masking model for spread-spectrum image watermarking
Author :
Kutter, Martin ; Winkler, Stefan
Author_Institution :
Signal Process. Lab., Swiss Fed. Inst. of Technol., Lausanne, Switzerland
Volume :
11
Issue :
1
fYear :
2002
fDate :
1/1/2002 12:00:00 AM
Firstpage :
16
Lastpage :
25
Abstract :
We present a perceptual model for hiding a spread-spectrum watermark of variable amplitude and density in an image. The model takes into account the sensitivity and masking behavior of the human visual system by means of a local isotropic contrast measure and a masking model. We compare the insertion of this watermark in luminance images and in the blue channel of color images. We also evaluate the robustness of such a watermark with respect to its embedding density. Our results show that this approach facilitates the insertion of a more robust watermark while preserving the visual quality of the original. Furthermore, we demonstrate that the maximum watermark density generally does not provide the best detection performance
Keywords :
copy protection; data encapsulation; image coding; image colour analysis; security of data; blue channel; color images; detection performance; embedding density; local isotropic contrast measure; luminance images; maximum watermark density; perceptual model; spread-spectrum image watermarking; spread-spectrum watermark; vision-based masking model; visual quality; Color; Helium; Humans; Laboratories; Pixel; Robustness; Signal processing; Spread spectrum communication; Visual system; Watermarking;
fLanguage :
English
Journal_Title :
Image Processing, IEEE Transactions on
Publisher :
ieee
ISSN :
1057-7149
Type :
jour
DOI :
10.1109/83.977879
Filename :
977879
Link To Document :
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