STAY DURATION MEASUREMENT DEVICE, STAY DURATION MEASUREMENT SYSTEM AND STAY DURATION MEASUREMENT METHOD

• US 20150095107A1
• Filed: 09/25/2014
• Published: 04/02/2015
• Est. Priority Date: 09/27/2013
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: MATSUMOTO, Yuichi, YOSHIO, Hiroaki, GOUDA, Youichi
• Granted Patent: US 10,185,965 B2
• Time in Patent Office: Days
• US Class Current: 705/7.29
• CPC Class Codes: G06Q 10/04 Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem" market predictions or forecasting for commercial activities G06Q30/0202
• CPC Class Codes: G06Q 30/02 Marketing; Price estimation or determination; Fundraising
• CPC Class Codes: G06Q 30/0201 Market modelling; Market analysis; Collecting market data
• CPC Class Codes: G06V 20/52 Surveillance or monitoring of activities, e.g. for recognising suspicious objects recognising microscopic objects G06V20/69

Abstract

A stay duration measurement device for measuring a stay duration in a measurement area for each moving object, includes: a movement line obtaining unit that obtains a movement line of each moving object detected from images including the measurement area; a movement line assessment unit that determines whether the movement line obtained by the movement line obtaining unit includes a missing part in the measurement area; and a stay duration obtaining unit that, in a case where it is determined by the movement line assessment unit that the movement line of a moving object of interest includes a missing part in the measurement area, obtains a stay duration compensated for the missing part based on a time period(s) required for movement(s) of one or more other moving objects in the measurement area.

Claims

1. A stay duration measurement device for measuring a stay duration in a measurement area for each moving object, the stay duration measurement device comprising:

a processor; and

a memory storing instructions,

wherein the processor, when performing the instructions stored in the memory, comprises;

a movement line obtainer that obtains a movement line of each moving object detected from images including the measurement area;

a movement line assessor that determines whether the movement line obtained by the movement line obtainer includes a missing part in the measurement area; and

a stay duration obtainer that, in a case where it is determined by the movement line assessor that the movement line of a moving object of interest includes a missing part in the measurement area, obtains a stay duration compensated for the missing part based on a time period(s) required for movement(s) of one or more other moving objects in the measurement area.

2. The stay duration measurement device according to claim 1, wherein the movement line assessor determines that the movement line includes a missing part in the measurement area when the movement line crosses only one or neither of a measurement start line and a measurement end line defined on a boundary of the measurement area.

3. The stay duration measurement device according to claim 1, further comprising a learning model generator that collects time periods required for movements of multiple moving objects in the measurement area, and generates a learning model in which compensation times are set such that a compensation time for a missing part in a movement line is determined based on a position of the missing part,

wherein the stay duration obtainer obtains, according to the learning model, a compensation time based on the position of the missing part in the movement line of the moving object of interest, and obtains a stay duration compensated for the missing part by use of the obtained compensation time.

4. The stay duration measurement device according to claim 3, wherein:

the movement line assessor determines whether the movement line is in an appearing pattern in which the movement line appears within the measurement area;

the learning model generator generates a learning model for the appearing pattern in which time periods required for entry into the measurement area to reaching various positions in the measurement area are set as the compensation times; and

when it is determined by the movement line assessor that the movement line is in the appearing pattern, the stay duration obtainer obtains, according to the learning model for the appearing pattern, the compensation time based on a position of a start point of the movement line.

5. The stay duration measurement device according to claim 3, wherein:

the movement line assessor determines whether the movement line is in a disappearing pattern in which a movement line disappears within the measurement area;

the learning model generator generates a learning model for the disappearing pattern in which time periods required to move from various positions in the measurement area to exit the measurement area are set as the compensation times; and

when it is determined by the movement line assessor that the movement line is in the disappearing pattern, the stay duration obtainer obtains, according to the learning model for the disappearing pattern, the compensation time based on a position of an end point of the movement line.

6. The stay duration measurement device according to claim 3, wherein:

the measurement area is divided into a plurality of division areas;

the learning model generator collects time periods required for movements of multiple moving objects in the measurement area on the basis of division areas and generates the learning model such that a compensation time is set for each division area; and

the stay duration obtainer obtains, according to the learning model, the compensation time based on a position of one or more division areas in which the missing part is present.

7. The stay duration measurement device according to claim 3, wherein:

the learning model generator generates a learning model for each time slot; and

the stay duration obtainer obtains the compensation time according to a learning model of a time slot in which the moving object of interest was detected.

8. The stay duration measurement device according to claim 1, wherein the stay duration obtainer replaces the stay duration of a moving object whose movement line is determined to include a missing part in the measurement area with a stay duration of another moving object whose movement line is determined not to include a missing part in the measurement area.

9. The stay duration measurement device according to claim 8, wherein the stay duration obtainer replaces the stay duration of the moving object whose movement line is determined to include a missing part in the measurement area with a stay duration of a moving object which, of other moving objects whose movement line is determined not to include a missing part in the measurement area, is temporally closest to the moving object whose movement line is determined to include a missing part.

10. The stay duration measurement device according to claim 1, further comprising

a storing unit that cumulatively stores the stay durations obtained for respective moving object by the stay duration obtainer,

a statistical processor that performs temporal statistical processing on the stay durations obtained for the respective moving objects and cumulatively stored in the storing unit to thereby generate statistical information;

and

an output information generator that generates output information including the statistical information.

11. The stay duration measurement device according to claim 10, wherein the output information generator generates output information relating to a display image in which one or more images representing the statistical information are displayed superimposed on an image including the measurement area.

12. The stay duration measurement device according to claim 11, wherein in the display image, a magnitude of a numerical value of the statistical information is expressed by at least one of a size, tint and darkness of the image representing the statistical information.

13. The stay duration measurement device according to claim 10, wherein:

the statistical processor obtains stay durations for respective unit times as the statistical information based on the stay durations obtained for the respective moving objects; and

the output information generator generates output information for arranging the stay durations for the respective unit times in chronological order.

14. The stay duration measurement device according to claim 10, wherein:

the statistical processor obtains a difference between sets of statistical information obtained under different conditions; and

the output information generator generates output information including the difference between the sets of statistical information.

15. The stay duration measurement device according to claim 10, wherein the statistical information includes, in addition to the stay duration, a number of moving objects staying in the measurement area simultaneously.

16. A stay duration measurement system for measuring a stay duration in a measurement area for each moving object, the system comprising:

a camera that captures images of a region including the measurement area; and

a plurality of information processing devices,

wherein the plurality of information processing devices jointly comprise;

a moving object detector that detects a moving object from the images captured by the camera and outputs detection position information;

a movement line obtainer that obtains a movement line of each moving object based on the detection position information;

a movement line assessor that determines whether the movement line obtained by the movement line obtainer includes a missing part in the measurement area; and

a stay duration obtainer that, in a case where it is determined by the movement line assessor that the movement line of a moving object of interest includes a missing part in the measurement area, obtains a stay duration compensated for the missing part based on a time period(s) required for movement(s) of one or more other moving objects in the measurement area.

17. A stay duration measurement method for measuring a stay duration in the measurement area for each moving object, the method comprising:

obtaining a movement line of each moving object detected from images including the measurement area;

determining whether the movement line obtained by the step of obtaining includes a missing part in the measurement area; and

in a case where it is determined by the step of determining that the movement line of a moving object of interest includes a missing part in the measurement area, obtaining a stay duration compensated for the missing part based on a time period(s) required for movement(s) of one or more other moving objects in the measurement area,

wherein at least one of the obtaining a movement line, the determining whether the movement line includes a missing part in the measurement area, and the obtaining a stay duration compensated for the missing part is performed by a processor.