Document management system

• US 20080222095A1
• Filed: 08/24/2006
• Published: 09/11/2008
• Est. Priority Date: 08/24/2005
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: II, Yasuhiro
• Granted Patent: US 7,668,814 B2
• Time in Patent Office: Days
• US Class Current: 707/3
• CPC Class Codes: G06F 16/313 Selection or weighting of terms for indexing
• CPC Class Codes: G06F 16/338 Presentation of query results
• CPC Class Codes: Y10S 707/99933 Query processing, i.e. searching

Abstract

A document management system includes an image input unit that inputs a document as an electronic image; a character extraction unit that extracts character information from the input electronic image; a word extraction unit that extracts words from the character information; a document search unit that normalizes the extracted words, registers the normalized words in an index, and searches electronic images using the index; an attribute information generation unit that generates attribute information including the extracted words, positions and sizes of the extracted words, and the normalized words referring to the positions and sizes of corresponding extracted words; a search condition input unit that inputs a search keyword that is used by the document search unit when searching for a target electronic image; and a word highlighting unit that highlights the search keyword in the target electronic image found by the document search unit based on the attribute information.

Claims

1. A document management system, comprising:

an image input unit to input a document as an electronic image;

a character extraction unit to extract character information from the input electronic image;

a word extraction unit to extract words from the character information;

a document search unit to normalize the extracted words, to register the normalized words in an index, and to search electronic images using the index;

an attribute information generation unit to generate attribute information of the input electronic image, where the attribute information includes the extracted words, positions and sizes of the extracted words in the input electronic image, and the normalized words referring to the positions and sizes of corresponding extracted words;

a search condition input unit to input a search keyword for use by the document search unit when searching for a target electronic image; and

a word highlighting unit to highlight the search keyword in the target electronic image found by the document search unit based on the attribute information.

2. The document management system as claimed in claim 1, wherein the word highlighting unit highlights, in the target electronic image, both the search keyword input by the search condition input unit and a normalized word corresponding to the search keyword.

3. The document management system as claimed in claim 2, wherein the word highlighting unit highlights the search keyword and the corresponding normalized word in different manners.

4. The document management system as claimed in claim 1, wherein the word extraction unit extracts words by morphological analysis, where text written in a natural language is segmented into minimal meaningful units and parts of speech of the minimal meaningful units are determined.

5. The document management system as claimed in claim 1, wherein the document search unit normalizes the search keyword input by the search condition input unit and searches electronic images using the normalized search keyword.