초록 ▼

An identification code signal is impressed on a carrier to be identified (such as an electronic data signal or a physical medium) in a manner that permits the identification signal later to be statistically discerned and the carrier thereby identified. The method and apparatus are characterized by r

An identification code signal is impressed on a carrier to be identified (such as an electronic data signal or a physical medium) in a manner that permits the identification signal later to be statistically discerned and the carrier thereby identified. The method and apparatus are characterized by robustness despite degradation of the encoded carrier, and by holographic permeation of the identification signal throughout the carrier.

대표청구항 ▼

[ I claim:] [1.] In a method of image processing that includes processing an input image to steganographically encode a multi-bit message code therein, thereby yielding an encoded output image, and thereafter processing suspect data corresponding to said encoded output image to decode the message co

[ I claim:] [1.] In a method of image processing that includes processing an input image to steganographically encode a multi-bit message code therein, thereby yielding an encoded output image, and thereafter processing suspect data corresponding to said encoded output image to decode the message code therefrom, an improvement including:encoding the message code redundantly through the image data, wherein the message code can be detected from first and second non-overlapping rectangular excerpts thereof; anddecoding the message code from said suspect data without reference to said input image, said decoding including performing a domain transformation on a first set of data related to said suspect data, said domain transformation producing transformed data in a spatial frequency domain, and analyzing said transformed data.