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
Semiconductor pressure sensor
Optimizing federated and ETL'd databases with considerations of specialized data structures within an environment having multidimensional constraint
Plural component proportioner
Methods and apparatus to determine impressions using distributed demographic information
Housekeeping cart
Floor relief for dot improvement
Sense-amplifier monotizer
  Randomly Featured Patents
Latch with multiple locking means
Chrysoberyl gemstones
Starter relay control
Use and provision of an amorphous vinyl alcohol polymer for forming a structure
System and method for imputing data into a database
Dental gauge
Plastics articles
Method and system for correcting switched input A/D converters
System for dispensing liquid fuel to a motor vehicle fueling station
SOI lens structure for medical probe