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
Method, apparatus and computer program product for providing metadata entry
Electronic badge
Measuring apparatus for measuring a physical property of a sample
Toilet
Image processing system, image processing method and program for image processing
Performance monitoring of advanced process control systems
Conductor-mixed active electrode material, electrode structure, rechargeable battery, and manufacturing method of conductor-mixed active electrode material
  Randomly Featured Patents
Device isolation method in integrated circuits
Potassium channels and genes encoding these potassium channels
Wing nut driver
Uniting rod-like articles, particularly for filter cigarette manufacture
Secondary battery cell protection circuit
Automatic identification of the anterior and posterior commissure landmarks
Two-handed controller for preventing trigger tie-down
System, method and circuit for performing round robin arbitration
Accordion style cable stand-off
Milling machines with pivotal head