Image analysis – Applications
Reexamination Certificate
2006-12-20
2010-06-22
Kim, Charles (Department: 2624)
Image analysis
Applications
C713S176000, C358S003280
Reexamination Certificate
active
07742619
ABSTRACT:
This invention is a new approach for the image watermarking in the wavelet transform domain based on sequency of the host and watermark image. For each sub-band a first transform level of the host image is thresholded and binarized. Sequencies of thresholded and binarized data host image are compared with sequencies of the discrete wavelet transformed watermark image to form a watermarking sequency mask. The watermarked wavelet domain data is formed by combining data elements of the discrete wavelet transformed host image with corresponding data elements of the wavelet transformed watermark image as filtered by the watermarking mask. A reverse process can extract the watermark with a high degree of accuracy even after attack upon the watermarked host image.
REFERENCES:
patent: 2004/0215965 (2004-10-01), Tokuda et al.
patent: 2007/0092102 (2007-04-01), Kot et al.
Jayaraman Raghuram Karthik
Kumar Sanjeev
Brady W. James
Kim Charles
Marshall, Jr. Robert D.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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