Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and system for watermark detection










Image Number 4 for United States Patent #7133536.

A system and method of detecting and authenticating a watermark on a document such as a check which is supposed to include a watermark having known characteristics to verify the authenticity of the document. A digitized image of the document is stored and processed through transformation which generates a frequency distribution. That frequency distribution is processed to determine one or more harmonic compared to a stored value associated with the document to determine that a watermark exists and it is the correct watermark.








 
 
  Recently Added Patents
Lubrication oil compositions
Toolbox
Electronic device with dock
Method, computer program and print system for trapping print data
Parallel decoding for scalable video coding
Power conversion circuit for light emitting diode
Capacitive microphone with integrated cavity
  Randomly Featured Patents
Hermetic seal and method to create the same
Distributed variable synchronizer
Starch hydrolysates as fat replacements
RF nanoswitch
Liner-free tungsten contact
Material for sintering emitting a lesser amount of nitrogen oxide and a method for manufacturing the same
Method of making a high power laser mirror
Method of detecting fire in an early stage
Method and casting mold for manufacturing a quartz glass body
Jointless artificial foot