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
Hoists
Viewing stand
Bend resistant cable
System and method for interactive image-based modeling of curved surfaces using single-view and multi-view feature curves
Dynamic facsimile transcoding in a unified messaging platform
Wire guide
Image processing apparatus and image processing method
  Randomly Featured Patents
Method and apparatus for fastening steel framing with nails
Vertical GaN-based LED and method of manufacturing the same
Long hinge actuator snubbing
Method for shaping signal pulses
Cabinet for a loudspeaker
Electrolyte and method for depositing tin-silver alloy layers
Method to destroy or impair target cells
Method for purifying a nickel sulfate solution by solvent extraction
Mesenchymal stem cells for the treatment of CNS diseases
Fluoroalkylcarboxylic acid and derivative thereof