Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Decoding message data embedded in an image print via halftone dot orientation










Image Number 19 for United States Patent #8014035.

What is disclosed is a novel system and method for encoding/decoding data in a cover contone image via halftone dot orientation modulation. Arrays of halftone threshold values are used to determine a desired orientation, e.g. 0/90.degree.+/-45.degree. for a given single data value of the original message to be embedded. Message data is embedded as a function of halftone dot orientation. Detection modeling of the print-scan process enables the determination of dot orientation from the image scan via statistically motivated image moments. A probabilistic model of the print-scan channel conditions received moments on input orientation. Density values of the received moments are used to determine dot orientation for each halftone cell. The embedded data is retrieved based on the determined orientations. The present method is applicable to areas of data embedding, document security, and the like.








 
 
  Recently Added Patents
Managing aging of silicon in an integrated circuit device
Portable stand for computer
Combination immunotherapy for the treatment of cancer
Apparatus for tuning a musical instrument, and a related instrument
Tunnel magnetoresistance read head with narrow shield-to-shield spacing
Process for manufacturing a self-sealing composition
Method and computer system for automatic vectorization of a vessel tree
  Randomly Featured Patents
Alignment method for registering medical images
Paper sheet humidifying device, paper sheet post-processing apparatus and image forming system
Wire structure, method of forming wire, thin film transistor substrate, and method of manufacturing thin film transistor substrate
Self-healing ring switch and method of controlling the same
Mold with wear member
Capacitor forming methods with barrier layers to threshold voltage shift inducing material
Periodontal composition and method
Method for obtaining a printing plate according to the silver salt diffusion transfer process
Method for fabricating a self aligned contact plug
Plants and seeds of corn variety CV750102