Document retrieval apparatus, document retrieval system, document retrieval program, and document retrieval method

A document retrieval system comprising:

• a document retrieval apparatus;
• and
• a terminal device,
• wherein the document retrieval apparatus includes
• a storage device configured to store a program;
• and
• a processor configured to execute the program, and perform a process including
• receiving an input of a keyword;
• acquiring an author's name and a document file from a digital document database which stores document files of text data obtained by performing a character recognition process with respect to document image data of handwritten documents, and names of authors who wrote the handwritten documents;
• referencing an associating keyword database which stores information associating the authors' names, keywords, and associating keywords, to acquire an associating keyword of the input keyword, from the received input keyword and the acquired author's name;
• searching the acquired document file, using the input keyword and the acquired associating keyword;
• and
• outputting a search result of the searching.

A non-transitory computer-readable recording medium having stored therein a document retrieval program which, when executed by a computer, causes the computer to perform a process comprising:

• receiving an input of a keyword;
• acquiring an author's name and a document file from a digital document database which stores document files of text data obtained by performing a character recognition process with respect to document image data of handwritten documents, and names of authors who wrote the handwritten documents;
• referencing an associating keyword database which stores information associating the authors' names, keywords, and associating keywords, to acquire an associating keyword of the input keyword, from the received input keyword and the acquired author's name;
• searching the acquired document file, using the input keyword and the acquired associating keyword;
• and
• outputting a search result of the searching.

A document retrieval method to be implemented by a computer which performs procedures comprising:

• receiving an input of a keyword;
• acquiring an author's name and a document file from a digital document database which stores document files of text data obtained by performing a character recognition process with respect to document image data of handwritten documents, and names of authors who wrote the handwritten documents;
• referencing an associating keyword database which stores information associating the authors' names, keywords, and associating keywords, to acquire an associating keyword of the input keyword, from the received input keyword and the acquired author's name;
• searching the acquired document file, using the input keyword and the acquired associating keyword;
• and
• outputting a search result of the searching.