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
Information recording medium and information processing method for accessing content with license or copyright protection
Self-diagnostic method and system for implantable cardiac device
Efficient relay automatic repeat request procedure in broadband wireless access system
Memory device, test operation method thereof, and system including the same
LED package with top and bottom electrodes
Aggregating completion messages in a sideband interface
Vehicle running control system
  Randomly Featured Patents
Molten metal sampling device
Data system
Socket and contact of semiconductor package
Combination lock with dual locking means
System and methods for assisting businesses in compliance with gas emissions requirements
Optimum MACA-based channel allocation for TDMA call setup
Pneumatic handling and recoating apparatus and method of use
Process for management of industrial wastes
Corner shower caddy
Method for separating alkali metal ions from alkoxylates