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
Macrocyclic cysteine protease inhibitors and compositions thereof
Mobile communication method, mobile station, and network device
Power supply device
People engine optimization
Segmentation of a product markup image based on color and color differences
Pixel interleaving configurations for use in high definition electronic sign displays
Method, system and program for securing redundancy in parallel computing system
  Randomly Featured Patents
Surgical trocar
Modular wireless test architecture and method
Multimedia device for motor vehicle
Surface temperature probe with uniform thermocouple junction and overtravel protection
Optimizing interest potential
Combined cosmetic applicator and cap
Apparatus for calibrating an indicating pointer relative to instrument dial plate graduations
Method and system for exploiting information from heterogeneous sources
Method and apparatus for dynamic configuration of multiprocessor system
Variable focus optical system for data reading