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
Vehicle battery with cell balancing current paths and method of charging the same
Nacelle cover
Pixel structure of organic light emitting device
Method of using N-thio compounds for oligonucleotide synthesis
Measuring device and measuring method that use pulsed electromagnetic wave
State detection device, electronic apparatus, measurement system and program
Gas cap removal tool
  Randomly Featured Patents
Grinding wheel with segments for preventing one-sided wear
Certain pyridyloxybenzanilides having herbicidal properties
Human recombinant beta-interferon with improved solubility
Per-pixel output luminosity compensation
Fastening system for fastening a device which has two spaced holding flanges
System and method for chart pattern recognition and analysis in an electronic trading environment
Process for making a panel with a protected acoustic damping layer and acoustic panel as made
Low voltage vacuum switch with internal arcing shield
Paper supply apparatus for image reading apparatus and image reading apparatus with paper supply apparatus as well as paper supply apparatus
Battery protection circuit and method for energy harvester circuit