| 摘要 |
PURPOSE: To accurately retrieve a corresponding document with a normal key word even if the document is made into text data whose source document is misrecognized. CONSTITUTION: When the key word is inputted from an input device 2, a controller 1 decomposes one character, which is decomposed into plural characters and misrecognized, into the form that is misrecognized when the character is included in a character string constituting the original key word, thereby generating a 2nd key word. If there is a character string which has plural characters replaced with one character and is misrecognized in the character string constituting the original key word, they are replaced with the form that is misrecognized to generate a 3rd key word. Then document data in an external storage device 3 are retrieved by using those original, 1st, and 2nd key words. Consequently, even if said misrecognition is caused when the source document has characters recognized by an optical character recognizing device and is inputted to the external storage device 3, the corresponding document in the external storage device 3 can correctly be retrieved only by inputting the original key word. |
