Adaptive information-retrieval system

• US 7,249,124 B2
• Filed: 02/27/2003
• Issued: 07/24/2007
• Est. Priority Date: 03/04/2002
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Sasaki, Mikio, Murase, Fumihiko
• Primary Examiner(s): LEWIS, CHERYL RENEA
• Application Number:
  US10/373,683
• Publication Number:
  US 20030167263A1
• Time in Patent Office: 1,608 Days
• Field of Search: 707 1- 6, 707/100, 707/104.1
• US Class Current: 1/1
• CPC Class Codes: G06F 16/3347 using vector based model
• CPC Class Codes: Y10S 707/99933 Query processing, i.e. searching

Abstract

A vector retrieval/generation/correction unit of a user terminal generates, corrects, and optimizes an inquiry vector on the basis of a vector profile, an inquiry history, a user model, and a user profile. On the other hand, a vector retrieval/generation/correction unit in an information center generates/corrects/optimizes a feature vector on the basis of a vector table, a search history, and a contents description database. In the information center, when an inquiry profile including an inquiry vector is transmitted from the user terminal, an adaptive searching process is executed. According to evaluation made by a contents evaluating unit, proper contents are retrieved from a contents database.

Claims

1. An adaptive information-retrieval system enabling a high-speed search to be performed on a computer, which includes using inquiry information corresponding to an inquiry and feature information added to contents to be retrieved, the inquiry information including at least one of image, sound and text, and at least a part of the inquiry information and the feature information including a vector relating to the at least one of image, sound and text;

evaluating means for evaluating the contents by using the inquiry information and the feature information and for adaptively evaluating the contents by assigning the vector an attribute value from an available set of attribute values corresponding to at least one of the inquiry information and the feature information; and

searching means for searching a database based on evaluated content results from the evaluation means, retrieving information based thereon and, presenting retrieved information to a user,

wherein the searching means selects a search method by calculating a speedup ratio as an index of search time.

2. An adaptive information-retrieval system enabling a high-speed search to be performed on a computer, which includes using inquiry information corresponding to an inquiry and feature information added to contents to be retrieved, the inquiry information including at least one of image, sound and text, and at least a pan of the inquiry information and the feature information including a vector relating to the at least one of image, sound and text;

evaluating means for evaluating the contents by using the inquiry information and the feature information and for adaptively evaluating the contents by assigning the vector an attribute value from an available set of attribute values corresponding to at least one of the inquiry information and the feature information; and

searching means for searching a database based on evaluated content results from the evaluation means, retrieving information based thereon and presenting retrieved information to a user,

wherein the evaluation means evaluates the contents on the basis of an inquiry vector included in the inquiry information and a feature vector included in the feature information, and

wherein the evaluation evaluates the contents on the basis of classification of a feature space formed by the feature vector.

3. An adaptive information-retrieval system enabling a high-speed search to be performed on a computer, which includes using inquiry information corresponding to an inquiry and feature information added to contents to be retrieved, the inquiry information including at least one of image, sound and text, and at least a part of the inquiry information and the feature information including a vector relating to the at least one of image, sound and text;

evaluating means for evaluating the contents by using the inquiry information and the feature information and for adaptively evaluating the contents by assigning the vector an attribute value from an available set of attribute values corresponding to at least one of the inquiry information and the feature information; and

searching means for searching a database based on evaluated content results from the evaluation means, retrieving information based thereon and presenting retrieved information to a user,

wherein the evaluation means evaluates the contents on the basis of an inquiry vector included in the inquiry information and a feature vector included in the feature information, and

wherein the evaluation means modifies, by at least one of structuring and dividing, a feature space formed by the feature vector on the basis of the inquiry information.

4. An adaptive information-retrieval system enabling a high-speed search to be performed on a computer, which includes using inquiry information corresponding to an inquiry and feature information added to contents to be retrieved, the inquiry information including at least one of image, sound and text, and at least a part of the inquiry information and the feature information including a vector relating to the at least one of image, sound and text;

evaluating means for evaluating the contents by using the inquiry information and the feature information and for adaptively evaluating the contents by assigning the vector an attribute value from an available set of attribute values corresponding to at least one of the inquiry information and the feature information; and

searching means for searching a database based on evaluated content results from the evaluation means, retrieving information based thereon and presenting retrieved information to a user,

wherein the evaluation means evaluates the contents on the basis of an inquiry vector included in the inquiry information and a feature vector included in the feature information, and

wherein the evaluation means modifies, by at least one of re-locating and moving, the feature vector on the basis of the inquiry information.

5. An adaptive information-retrieval system enabling a high-speed search to be performed on a computer, which includes using inquiry information corresponding to an inquiry and feature information added to contents to be retrieved, the inquiry information including at least one of image, sound and text, and at least a part of the inquiry information and the feature information including a vector relating to the at least one of image, sound and text;

evaluating means for evaluating the contents by using the inquiry information and the feature information and for adaptively evaluating the contents by assigning the vector an attribute value from an available set of attribute values corresponding to at least one of the inquiry information and the feature information; and

searching means for searching a database based on evaluated content results from the evaluation means, retrieving information based thereon and presenting retrieved information to a user,

wherein the evaluation means evaluates the contents on the basis of an inquiry vector included in the inquiry information and a feature vector included in the feature information, and

wherein when a value of an attribute of the feature vector is an undefined value, the evaluation means evaluates the contents by using at least one of an average value and zero.

6. An adaptive information-retrieval system enabling a high-speed search to be performed on a computer, which includes using inquiry information corresponding to an inquiry and feature information added to contents to be retrieved, the inquiry information including at least one of image, sound and text, and at least a part of the inquiry information and the feature information including a vector relating to the at least one of image, sound and text;

evaluating means for evaluating the contents by using the inquiry information and the feature information and for adaptively evaluating the contents by assigning the vector an attribute value from an available set of attribute values corresponding to at least one of the inquiry information and the feature information; and

searching means for searching a database based on evaluated content results from the evaluation means, retrieving information based thereon and presenting retrieved information to a user,

wherein the evaluation means evaluates the contents on the basis of an inquiry vector included in the inquiry information and a feature vector included in the feature information, and

wherein the evaluation means realizes a change in a viewpoint by changing a coordinate system at the time of mapping the inquiry vector into a feature space formed by the feature vector.

7. An adaptive information-retrieval system according to claim 6, wherein the coordinate system is changed on the basis of private information of the user.

8. An adaptive information-retrieval system according to claim 6, wherein the coordinate system is changed on the basis of a user model obtained by modeling user information.