Patent ID: 6028970
Filing Date: 2000-02-22
Classification: G06K

Abstract:
Optical character recognition apparatus for recognizing predetermined characters and symbols in an electronic bit map, said optical character recognition apparatus comprisinga data receiver for receiving said electronic bit map,a data processor responsive to said data receiver, said data processor comprising a plurality of modules, the modules comprisinga data rules module for determining a context type for a bit-map portion, said data rules module comprising a memory table of rules associated with context types, said data rules module generating a hierarchy of rule bases of selected rules for a plurality of different context types in an iterative process beginning at a character/symbol context type, progressing to a data field context type, said data field comprising a recognizable string of characters/symbols, and further progressing to combinations of different data field context types to flag possible errors so long as all said selected rules fail to pass andan error correction logic module for applying said generated hierarchy of rule bases to correct flagged possible errors and other errors in said electronic bit-map portion if a confidence level is exceeded in accordance with a context type determined by said data rules module and for querying a trusted entity regarding one of a flagged possible error and a corrected other error, anda memory for storing said memory tables, modules, hierarchy of rule bases for context types and electronic bit maps and for further storing an error detection and correction log responsive to said error-correction-logic module when all said selected rules pass.