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
Electrophotographic photoreceptor, image-forming apparatus, and electrophotographic cartridge
Semiconductor process
Buffering stop structure and corresponding packing case
Method for forming contact in an integrated circuit
Memory device and method for repairing a semiconductor memory
Cooking tray
Cellulose ester compositions having low birefringence and films made therefrom
  Randomly Featured Patents
Optical disc apparatus and method for controlling focus of the same
Method and system for supplying vaporized gas on consumer demand
Cartridge having textured membrane
Class-switching in class-based data communcations network
Apparatus for measurement and control, respectively, of temperature and/or pressure
System and method for designing multiple clock domain circuits
Article, method for controlling casing depletion
Portable tube cleaning system
Knife blade
Distributor for an internal combustion engine