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
Image processing device and information storage medium including motion vector information calculation
Liquid crystal display device
Matching geometry generation and display of mammograms and tomosynthesis images
Hand sign
Nucleotide sequence coding for variable regions of .beta. chains of human T lymphocyte receptors, corresponding peptide segments and the diagnostic and therapeutic uses
Spectral measurement device
Implantable neuro-stimulation electrode with fluid reservoir
  Randomly Featured Patents
Semiconductor memory device of hierarchical bit-line architecture using crosspoint-type memory cell
Liquid composition for removing photoresist residue and polymer residue
Crystalline forms of the mono-sodium salt of D-isoglutamyl-D-tryptophan
Radio
Vehicle seats
Diesel fuel additive
Removeable car seat cover
Loudspeaker
Fuel hose and method of producing thereof
Start-up with ruthenium catalysts