Resources Contact Us Home
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
Plants and seeds of hybrid corn variety CH367819
Pyridyldiamido transition metal complexes, production and use thereof
System for determining movement properties of a guided vehicle
Satellite fleet deployment
Systems and methods for generating customized user interfaces
Interconnect, bus system with interconnect and bus system operating method
Tropoelastin derivatives
  Randomly Featured Patents
Method and apparatus for multiplexing control and data channel
Cutting disc core for a circular saw blade
Thorax drainage apparatus with variable vacuum control
Communication systems, methods, and computer program products for efficient peer-to-peer transmission
Vehicle frame structure
Excess developing liquid removing device for electrophotography
Nucleic acid purification method and purification apparatus
Pattern-recognition computing and method for producing same
Universal suction-based connection device