DOCUMENT MONITOR DEVICE, RECORDING MEDIUM STORING DOCUMENT MONITOR PROGRAM, DOCUMENT MONITOR SYSTEM, AND DOCUMENT MONITOR METHOD

• US 20090051961A1
• Filed: 03/03/2008
• Published: 02/26/2009
• Est. Priority Date: 08/24/2007
• Status: Active Grant

• Current Assignee: Fujifilm Business Innovation Corp. (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Inventors: OHSAWA, Takashi
• Granted Patent: US 8,237,948 B2
• Time in Patent Office: Days
• US Class Current: 358/1.150
• CPC Class Codes: G06F 21/6218 to a system of files or objects, e.g. local or distributed file system or database
• CPC Class Codes: G06F 2221/2113 Multi-level security, e.g. mandatory access control

Abstract

A document monitor device, which includes: a confidential information storage section that stores confidentiality level information of documents managed in a document management device associated with identification information of each of the documents; a feature storage section that stores features of the documents associated with the identification information; a selection section that selects a target document from the managed documents based on the confidentiality level information; an acquisition section that acquires a target image to be processed by an image processing device; an extraction section that extracts features of the target image; a similarity level calculation section that calculates a similarity level between the features stored in association with the identification information of the selected target document and the extracted features; and a detection information output section that, when the similarity level is a prescribed value or over, outputs information indicating that a similar image is detected.

Claims

1. A document monitor device, comprising:

a confidential information storage section that stores confidentiality level information of documents managed in a document management device in association with identification information of each of the documents;

a feature storage section that stores features of the documents managed in the document management device in association with the identification information;

a selection section that selects a target document from the documents managed in the document management device based on the confidentiality level information stored in the confidential information storage section;

an acquisition section that acquires a target image to be processed by an image processing device;

an extraction section that extracts features of the target image acquired by the acquisition section;

a similarity level calculation section that calculates a similarity level between the features stored in the feature storage section in association with the identification information of the target document selected by the selection section and the features extracted by the extraction section; and

a detection information output section that, when the similarity level calculated by the similarity level calculation section is a prescribed value or over, outputs information indicating that a similar image is detected.

2. The document monitor device according to claim 1, wherein

the confidential level information is additional information added by the document management device in correspondence with each of the documents.

3. The document monitor device according to claim 2, wherein

the additional information includes at least one of a confidential level set corresponding to each of the documents, a distribution level indicating a frequency of use of each of the documents, and a freshness level indicating an elapsed time from registration to the document management device.

4. A computer readable recording medium storing a document monitor program that causes a computer to execute a process, the process comprising:

storing confidentiality level information of documents managed in a document management device in association with identification information of each of the documents;

storing features of the documents managed in the document management device in association with the identification information;

selecting a target document from the documents managed in the document management device based on the stored confidentiality level information;

acquiring a target image to be processed by an image processing device;

extracting features of the acquired target image;

calculating a similarity level between the features stored in association with the identification information of the selected target document and the extracted features; and

outputting, when the calculated similarity level is a prescribed value or over, information indicating that a similar image is detected.

5. A document monitor system, comprising

a document management device that manages documents;

an image processing device that processes images; and

a document monitor device that can communicate with the document management device and the image processing device,

the document monitor device including;

a confidential information storage section that stores confidentiality level information of documents managed in the document management device in association with identification information of each of the documents;

a feature storage section that stores features of the documents managed in the document management device in association with the identification information;

a selection section that selects a target document from the documents managed in the document management device based on the confidentiality level information stored in the confidential information storage section;

an acquisition section that acquires a target image to be processed by the image processing device;

an extraction section that extracts features of the target image acquired by the acquisition section;

a similarity level calculating section that calculates a similarity level between the features stored in the feature storage section in association with the identification information of the target document selected by the selection section and the features extracted by the extraction section; and

a detection information output section that, when the similarity level calculated by the similarity level calculation section is a prescribed value or over, outputs information indicating that a similarity image is detected.

6. A document monitor method, comprising:

storing confidentiality level information of documents managed in a document management device in association with identification information of each of the documents;

storing features of the documents managed in the document management device in association with the identification information;

selecting a target document from the documents managed in the document management device based on the stored confidentiality level information;

acquiring a target image to be processed by an image processing device;

extracting features of the acquired target image;

calculating a similarity level between the features stored in association with the identification information of the selected target document and the extracted features; and

outputting, when the calculated similarity level is a prescribed value or over, information indicating that a similar image is detected.