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
Process for preparing soybean curd using micronized solution of soybean curd
Image forming apparatus and method
Management of temporal data by means of a canonical schema
Process for the preparation of morphinane analogues
Headset systems and methods
Vehicle inertial sensor systems
Changing sound alerts during a messaging session
  Randomly Featured Patents
Steam turbine plant
Ergonomic kneeling bench or stool
Memory buffer system using a single pointer to reference multiple associated data
Structure, method and system for complementary strain fill for integrated circuit chips
Letrozole purification process
Mechanism for supporting indexed tagged content in a general purpose data store
Tweezers with gripping elements mounted swivelling on branches
Method and integrator circuit for integrating signals, in particular for scintillation gamma camera
Method and apparatus for composite manufacture
Driver circuit for providing pulses having clean edges