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
Method for transferring inventory between virtual universes
Method for counting and segmenting viral particles in an image
Sub-LUN input/output profiling for SSD devices
Positive electrode for secondary battery, and secondary battery
Preparation of isomerically pure substituted cyclohexanols
Reserving a time block in a calendar application to account for a travel time between geographic locations of appointments
  Randomly Featured Patents
Multi-layer catalyst for producing phthalic anhydride
Preparation of ethyl carboxylates
Mobile or portable apparatus with pressurized gas supply for preparing beverages or similar products
Apparatus and method for detecting gamma ray radiation
Valve for dispensing a measured volume of fluid from a container containing a fluid substance under pressure
Compressed natural gas cylinder pump and reverse cascade fuel supply system
Hydraulic pressure control apparatus for vehicle with automatic transmission
Sized head gear
Polyester containers having a reduced coefficient of friction