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
Use of beta-adrenoceptor antagonists for the manufacture of a medicament of the treatment of disorders of the outer retina
Method and apparatus for filter-less class D audio amplifier EMI reduction
Disk drive to enable defect margining
Systems and methods for automobile accident claims initiation
Gearbox housing
Coordinate measuring device and method for measuring with a coordinate measuring device
Latch-up free ESD protection
  Randomly Featured Patents
Heat-sensitive recording material
Sharing signal lines in a memory device
Arrangement for testing telecommunication repeaters
System and method for bit interleaving of full-rate speech data
Orthotic insert and method or making of the same
Apparatus and methods for reducing blur in camera images
Control of digital projection system
Selective acylation of hydrazines
Projected display to enhance computer device use
System and method for managing release of goods for packaging