When texts recognized by an OCR are registered and those texts are searched by a search word, a state in which the search cannot be performed depending on an error recognition at the time of the recognition by the OCR is eliminated. It is an object of the invention to realize a process such that no burden...http://www.google.ca/patents/US5905811?utm_source=gb-gplus-sharePatent US5905811 - System for indexing document images
