Resources Contact Us Home
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
Frame syncrhonization in orthogonal frequency-division multiplexing systems
Reception circuit and signal reception method
Navigation device, navigation method, and navigation program
Antibodies to CCR2
Device, information processing method, and computer-readable storage medium
Pharmaceutical compositions of entacapone, levodopa and carbidopa with improved bioavailability
Integrated projector system
  Randomly Featured Patents
Method and device for separation of a liquid fluid by centrifugal separation and evaporation
Apparatus and method for detecting decrease in air-pressure for use in two-wheeled vehicle, and program for judging decompression for use in two-wheeled vehicle
Optical cross-connect switch with integrated optical signal tap
Process for the production of copper (II) chloride from copper (II) oxychloride using tertiary amine hydrochlorides
Reservoir apparatus for a bicycle brake lever device
Culture of sessile marine animals
Non-volatile storage device and control method thereof
Component for a knitting system
Method and apparatus for rapidly testing passive components by reflectometry in the VHF range