Document search device

Abstract

A kind of highly precise retrieval which is realized by taking discrimination between a printing type letter and a handwritten letter into consideration, this document retrieval device is provided with a character recognition means 2 recognizing a character written in a sentence inputted by a document inputting means 1 and extracting information about a quality and a condition of the character as retrieval auxiliary information from an image of the inputted document, a character dictionary 3 storing characteristics of a character standard pattern, a document accumulating means 4 accumulating the character identification result and the retrieval auxiliary information as document data for retrieval, a retrieval document database 7 storing document data for retrieval, a keyword inputting means 5 inputting a keyword for document retrieval, a document retrieving means 6 performing collation matching the retrieval auxiliary information extracted by the character recognition means in collation between the document data for retrieval and the keyword letter, and a retrieval result outputting means 8 outputting the retrieval result. In this way, retrieval is carried out with high precision, and omitting of retrieval and retrieval noise can be reduced.

Description

technical field [0001] The present invention relates to a document retrieval device for electronically storing, retrieving and viewing images such as documents or drawings, and particularly relates to using any key A document retrieval device for full-text retrieval of words. Background technique [0002] In order to electronically register, store, retrieve, and display paper documents as computer-readable document images, conventionally, there has been a method of manually adding keyword information to document images at the time of document registration, or using an OCR (optical document reader) ) recognizes characters in a document image, and saves the generated document text together with the document image. [0003] The former method requires a lot of labor and time for adding keywords at the time of document registration. On the other hand, the latter method cannot avoid erroneous recognition due to incomplete character recognition performance. If the character code ...

AI Technical Summary

Problems solved by technology

[0024] In this way, the error tendency in character recognition differs depending on whether there is a character frame or whether the written characters are printed or handwritten. If these aspects are not taken into account when searching documents, there is a problem that high-precision searching cannot be realized.

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