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
Noise spectrum tracking in noisy acoustical signals
Tailoring the band gap of solar cells made of liquid silane by adding germanium
Method and apparatus for determining the altitude of a mobile device
Reaction medium for detecting and/or identifying bacteria of the Legionella genus
Sensor controller, navigation device, and sensor control method
ESD protection circuit and ESD protection device thereof
Positioning vehicles to improve quality of observations at intersections
  Randomly Featured Patents
Iron golf club head
Reversible V groove round nose bit
Electric furnace
Adjustable joint assembly for ladder sections
Metal coordinated compositions
Semiconductor light emitting device with a contact formed on a textured surface
Electric saw
Method for vertical continuous casting of metals
Vascular sealant delivery device and sheath introducer and method
Fluorescent bulb retaining spring