Arrangement for embedding subliminal data in imaging
First Claim
1. A method for embedding a message into a digital image signal comprising:
- providing a digital message;
providing at least one carrier;
multiplying the digital message with the at least one carrier and accumulating a result of the multiplying to form a composite signal; and
combining the composite signal with the digital image signal to form an image signal with an embedded digital message.
6 Assignments
0 Petitions
Accused Products
Abstract
Various improvements to steganographic systems, and applications therefore, are disclosed. The improvements include facilitating scale and rotation registration for steganographic decoding by use of rotationally symmetric steganographically embedded patterns and subliminal digital graticules; improved techniques for decoding without access to unencoded originals; improving robustness of steganographic coding in motion pictures and/or in the presence of lossy compression/decompression; and representing data by patterned bit cells whose energy in the spatial domain facilitates decoding registration. Applications include enhanced-security financial transactions, counterfeit resistant identification cards, fraud deterrent systems for cellular telephony, covert modem channels in video transmissions, photo duplication kiosks with automatic copyright detection, and hotlinked image objects (e.g. with embedded URLs) for use on the internet.
74 Citations
16 Claims
-
1. A method for embedding a message into a digital image signal comprising:
-
providing a digital message; providing at least one carrier; multiplying the digital message with the at least one carrier and accumulating a result of the multiplying to form a composite signal; and combining the composite signal with the digital image signal to form an image signal with an embedded digital message. - View Dependent Claims (2, 3, 4)
-
-
5. A method for embedding a message into a digital image signal comprising:
-
providing a digital message; providing at least one carrier; modulating the carrier according to the digital message to form a modulated carrier; and combining the modulated carrier signal with the digital image signal to form an image signal with an embedded digital message, wherein the message is redundantly embedded and spatially distributed in the image signal. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
Specification