Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Automated recognition of characters using optical filtering with maximum uncertainty - minimum variance (MUMV) functions










Image Number 3 for United States Patent #5371808.

A method and apparatus is described for recognition of hand printed characters using maximum uncertainty--minimum variance (MUMV) functions, such as Gabor functions, implemented by optical elements. A set of optical elements having varying optical density corresponding to a set of two-dimensional MUMV functions is generated. A pattern of illumination responsive to the image of the character to be identified is simultaneously transmitted through each of the optical elements implementing the MUMV functions. The amount of light transmitted through each of the elements is measured, providing a transmission coefficient. Such transmission coefficients are used as a set of inputs to a neural network, such that the inputs to the neural network are a set of transmission coefficients resulting from transmission of light corresponding to a character to be identified through a complete set of optical elements implementing a set of two-dimensional MUMV functions. The neural network calculates weighted sums of the transmission coefficients. The neural network may be implemented as a network of resistors connected between input nodes, intermediate nodes, and output nodes. The output node having the highest voltage identifies the character to be identified.








 
 
  Recently Added Patents
Electrode-membrane-frame assembly for fuel cell, polyelectrolyte fuel cell and manufacturing method therefor
Method and apparatus for transmitting ranging channel in wireless communication system
Ranking clusters and resources in a cluster
System and method for electronic moving map and aeronautical context display
Spacer lithography
Automatic measurement and gain control of distributed Raman amplifiers
Methods to characterize sag in fluids
  Randomly Featured Patents
Near field communication based key sharing techniques
Working mechanical device and manipulator
Operating system page placement to maximize cache data reuse
Method of manufacturing solid glass preforms from hollow preforms
Method of sorting semiconductor lasers
Optical measuring method of expiration components
High-speed demultiplexer circuit
Turbogenerator power control system
Filter cleaning nozzle apparatus
Ground clamp for a welding apparatus