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
Luminaire
Glass or glass-ceramic pane reflecting infrared radiation
Measuring apparatus for measuring a physical property of a sample
Display systems with touch screens
Emergency whistle, flashlight, and compass
Gas cap removal tool
Data processor and scanner device
  Randomly Featured Patents
Controller
Biologically active B-chain homodimers
Universal diagnostic platform for specimen analysis
Electrical machine
Electrostatic loudspeaker
Cassette holder for cleaning equipment
Method of, and configuration for, opening a security housing
Handset
Apparatus and method for dynamic detection and attenuation of periodic acoustic feedback
Biomarkers of vulnerable atherosclerotic plaques and methods of use