Adaptation Of Location Similarity Threshold In Associative Content Retrieval

• US 20080091728A1
• Filed: 11/30/2005
• Published: 04/17/2008
• Est. Priority Date: 12/01/2004
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Diederiks, Elmo, Van De Sluis, Bartel
• Granted Patent: US 8,442,976 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 16/93 Document management systems
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/322 used signal is digitally coded

Abstract

Retrieval of similar content item or documents is provided based on similarity of their location or place. A base location is determined, for example using a GPS device. Location of one or more identified anchor document(s), in a database for example, is determined by extracting location data. Then a first threshold is set based on a criterion distance determined between the base location and the anchor item location. A candidate document item location is identified and the location data for candidate content item may be extracted. A distance between the base location and the candidate location may be determined as a candidate distance. A candidate content item may be selected as similar for retrieval based on the first candidate distance and the first threshold. The notion of criterion distance-determined granularity for setting a threshold is provided.

Claims

1. A content item retrieval method comprising:

determining (S1) a base location;

extracting (S2), as a first location, location data for a first identified content item;

setting (S5) a first threshold based on a criterion distance determined (S3) between the base location and the first location;

extracting (S6), as first candidate location, the location data for a first candidate content item, and determining (S7), as a first candidate distance, the distance between the base location and the first candidate location;

selecting (S8) the first candidate content item based on the first candidate distance and the first threshold; and

outputting (S9) a selection signal for the first candidate content item when the first candidate location is selected.

2. The method of claim 1, further comprising setting a second threshold based on the criterion distance, which second threshold together with the first threshold comprises a range, and selecting the first candidate content item when the first candidate distance is within the range.

3. The method of claim 1, wherein the first threshold is set based on criterion distance-determined granularity.

4. The method of claim 1, wherein at least one of the first location and the first candidate location comprises at least one of a location of content item acquisition, a location of content item last usage, and a location of content item most usage.

5. The method of claim 1, wherein at least one of the first location and the first candidate location comprises at least one of a content item current location, a content item most recent modification location, and a content item creation location.

6. The method of claim 1, wherein the base location is one of a current location of the first identified content item, a frequently visited location, a recently visited location by a user, and location of most presence of a user.

7. The method of claim 1, wherein the base location is one of a user home, a user office, a user vehicle, and a user current location.

8. The method of claim 1, wherein at least one of the base location and the location data is determined based on GPS information.

9. The method of claim 1, further comprising:

extracting (S2, as a second location, location data for a second identified content item; and

setting (S5) the first threshold based also on a second criterion distance determined as the distance between the base location and the second location.

10. A content item retrieval system comprising:

a base location extractor (1-13) configured to determine a base location;

a location data extractor (1-11) configured to extract, as a first location, location data for a first identified content item and to determine, as a criterion distance, a distance determined between the base location and the first location;

a threshold setter (1-14) configured to set a first threshold, based on a criterion distance determined as a distance between the base location and the first location;

said location data extractor (1-11) configured to extract, as first candidate location, the location data for a first candidate content item, and to determine, as a first candidate distance, the distance between the base location and the first candidate location;

a selector (1-16) configured to select the first candidate content item based on the first candidate distance and the first threshold; and

a result output (1-17) configured to output a selection signal for the first candidate content item when the first candidate location is selected.

11. The system of claim 10, further comprising said threshold setter (1-14) setting a second threshold based on the criterion distance, which second threshold together with the first threshold comprises a range, and said selector selecting the first candidate content item when the first candidate distance is within the range.

12. The system of claim 10, wherein the first threshold is set based on criterion distance-determined granularity.

13. The system of claim 10, wherein at least one of the first location and the first candidate location comprises at least one of a location of content item acquisition, a location of content item last usage, and a location of content item most usage.

14. The system of claim 10, wherein at least one of the first location and the first candidate location comprises at least one of a content item current location, a content item most recent modification location, and a content item creation location.

15. The system of claim 10, wherein the base location is one of a current location of the first identified content item and a frequently visited location, a recently visited location by a user, and location of most presence of a user.

16. The system of claim 10, wherein the base location is one of a user home, a user office, a user vehicle, and a user current location.

17. The system of claim 10, wherein at least one of the base location and the location data is determined based on one of user input and GPS information.

18. The system of claim 10, comprising:

said location data extractor (1-11) is configured to extract, as a second location, location data for a second identified content item; and

said threshold setter (1-14) is configured to set the first threshold based also on a second criterion distance determined as the distance between the base location and the second location.