DETERMINATION DEVICE AND DETERMINATION METHOD

• US 20160253554A1
• Filed: 02/02/2016
• Published: 09/01/2016
• Est. Priority Date: 02/27/2015
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Miyazaki, Nobuhiro, TSUJI, Kentaro, Zheng, Mingxie, Matsuda, Yuji, Minagawa, Akihiro, UEHARA, Yusuke
• Granted Patent: US 10,489,640 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06V 10/242 by image rotation, e.g. by 90 degrees
• CPC Class Codes: G06V 10/56 relating to colour
• CPC Class Codes: G06V 10/62 relating to a temporal dimension, e.g. time-based feature extraction; Pattern tracking
• CPC Class Codes: G06V 20/52 Surveillance or monitoring of activities, e.g. for recognising suspicious objects recognising microscopic objects G06V20/69
• CPC Class Codes: G06V 40/103 Static body considered as a whole, e.g. static pedestrian or occupant recognition

Abstract

A device that determines whether a first person extracted from a first image is identified with a second person extracted from a second image, includes a processor configured to extract a first feature value of a contour portion of the first person, from the first image, extract a second feature value of a contour portion of the second person, from the second image, and determine whether the first person is identified with the second person, based on comparison processing in which a first effect on a first comparison result of the first feature value and the second feature value becomes greater than a second effect on a second comparison result of a third feature value of a portion further from a contour than the contour portion of the first person and a fourth feature value of a portion further from the contour than the contour portion of the second person.

Claims

1. A determination device that determines whether or not a first person extracted from a first image is identified with a second person extracted from a second image, the determination device comprising:

a memory; and

a processor coupled to the memory and configured to;

extract a first feature value of a contour portion of the first person, from the first image,

extract a second feature value of a contour portion of the second person, from the second image, and

determine whether the first person is identified with the second person, based on comparison processing in which a first effect on a first comparison result of the first feature value and the second feature value becomes greater than a second effect on a second comparison result of a third feature value of a portion further from a contour than the contour portion of the first person and a fourth feature value of a portion further from the contour than the contour portion of the second person.

2. The determination device according to claim 1, wherein

the first feature value and the second feature value are each a feature value corresponding to a range that is predetermined in accordance with a distance from the contour.

3. The determination device according to claim 1, wherein

the comparison processing is according to a comparison of a fifth feature value weighted in accordance with a distance from the contour of the first person, and a sixth feature value weighted in accordance with a distance from the contour of the second person.

4. The determination device according to claim 1, wherein

the processor is configured to detect a first orientation of the first person and a second orientation of the second person, and when the first orientation and the second orientation do not match, perform the comparison processing.

5. A determination method that determines whether or not a first person extracted from a first image is identified with a second person extracted from a second image, the determination method comprising:

extracting a first feature value of a contour portion of the first person, from the first image;

extracting a second feature value of a contour portion of the second person, from the second image; and

determining, by a processor, whether the first person is identified with the second person, based on comparison processing in which a first effect on a first comparison result of the first feature value and the second feature value becomes greater than a second effect on a second comparison result of a third feature value of a portion further from a contour than the contour portion of the first person and a fourth feature value of a portion further from the contour than the contour portion of the second person.

6. The determination method according to claim 5, wherein

the first feature value and the second feature value are each a feature value corresponding to a range that is predetermined in accordance with a distance from the contour.

7. The determination method according to claim 5, wherein

the comparison processing is according to a comparison of a fifth feature value weighted in accordance with a distance from the contour of the first person, and a sixth feature value weighted in accordance with a distance from the contour of the second person.

8. The determination method according to claim 5, further comprising:

detecting a first orientation of the first person and a second orientation of the second person; and

when the first orientation and the second orientation do not match, performing the comparison processing.

9. A determination device, comprising:

a memory; and

a processor coupled to the memory and configured to;

extract a first contour portion of a first person from a first image,

extract a second contour portion of a second person from a second image,

compare the first contour portion with the second contour portion, and

determine whether the first person is identified with the second person, based on only a result of comparison.

10. The determination device according to claim 9, wherein the processor is configured to:

extract a first area corresponding to the first person from the first image,

specify the first contour portion in the first area,

extract a second area corresponding to the second person from the second image, and

specify the second contour portion in the second area.

11. The determination device according to claim 10, wherein the processor is configured to:

divide the first contour portion into a plurality of first small portions,

divide the second contour portion into a plurality of second small portions, and

compare the plurality of first small portions and the plurality of second small portions, respectively.