Image analysis – Applications
Reexamination Certificate
2006-06-06
2006-06-06
Werner, Brian (Department: 2621)
Image analysis
Applications
C382S232000
Reexamination Certificate
active
07058200
ABSTRACT:
A method for the prior monitoring of the detectability of a watermarking signal inserted by modulation in a set of coefficients representing for example a digital image. The method comprises the step of simulating a distortion on the set of modulated coefficients, the distortion corresponding to a given compression level of the set of coefficients before modulation, determined by optimisation of a ratio of transmission rate to distortion. The method further comprises the step of calculating a detectability test on the set of modulated coefficients after distortion, and a step of comparing the detectability test with a threshold detection value. The method is used notably for inserting a watermarking signal during the compression of a digital image.
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Donescu Ioana
Le Floch Hervé
Nguyen Eric
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Lavin Christopher
Werner Brian
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