Moving subject detecting apparatus and the method

• US 20030214420A1
• Filed: 05/12/2003
• Published: 11/20/2003
• Est. Priority Date: 05/17/2002
• Status: Abandoned Application

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Matsui, Masaru, Nagamitsu, Sachio
• Application Number:
  US10/435,390
• Publication Number:
  US 20030214420A1
• Time in Patent Office: Days
• US Class Current: 340/870.16
• CPC Class Codes: G08B 21/0423 detecting deviation from an expected pattern of behaviour or schedule
• CPC Class Codes: G08B 21/0469 Presence detectors to detect unsafe condition, e.g. infrared sensor, microphone G08B21/0476 takes precedence
• CPC Class Codes: G08B 21/22 responsive to presence or absence of persons

Abstract

Response pattern extracting unit 220 extracts absence detection response patterns including moving subject responses to be judged and presence detection response patterns that have symmetrical time component structures to these absence detection response patterns based on moving subject responses of moving subject detecting sensor 110 (at least one moving subject detecting sensor 110 is placed in respective rooms). Leaving room response pattern determining unit 230 adds flags showing leaving room response pattern to the above-mentioned absence detection response pattern when a response pattern extracted in response pattern extracting unit 220 includes a pair of time components that are in time reversal correlation with each other and practically equal to each other. Leaving room judging unit 240 refers to leaving room response pattern determining unit 830, the unit checks whether a flag showing a leaving room response pattern is added to the absence detection response pattern to be judged, and judges that someone left the room when receiving an absence detection response pattern to be judged from response pattern extracting unit 220.

Claims

1. A moving subject detecting apparatus for detecting a transfer of a moving subject in space composed of a plurality of areas, the moving subject detecting apparatus comprising:

a plurality of moving subject detecting sensors for detecting movements of a moving subject, at least one of the plurality of the moving subject detecting sensors being placed in respective one of the plurality of the areas;

a moving subject detection information generating unit operable to generate moving subject detection information that shows a detection state in which the moving subject is detected or a no detection state in which the moving subject is not detected in the respective areas based on presence or absence of the moving subject detecting sensor response;

a response pattern extracting unit operable to specify (i) a first response pattern in which, after a first area changes from a detection state to a no detection state, a second area changes from a no detection state to a detection state and (ii) a second response pattern in which, after a second area changes from a detection state to a no detection state, a first area changes from a no detection state to a detection state based on the generated moving subject detection information; and

a judging unit operable to judge that the moving subject moved from the first area to the second area according to the first response pattern when the first response pattern and the second response pattern specified are in a time reversal correlation with each other.

2. A moving subject detecting apparatus according to claim 1,

wherein the judging unit judges that the first response pattern and the second response pattern are in a time reversal correlation with each other when the time in the first response pattern after the first area changed from the detection state to the no detection state until the second area changes from the no detection state to the detection state is equal to the time in the second response pattern after the second area changes from the detection state to the no detection state until the first area changes from the no detection state to the detection state within a certain range.

3. A moving subject detecting apparatus according to claim 2, wherein the judging unit further judges that the first response pattern and the second response pattern are in a time reversal correlation with each other when the duration time of the detection state in the first area and the duration time of the detection state in the second area in the first response pattern are respectively equal to the duration time of the detection state in the first area and the duration time of the detection state in the second area in the second response pattern within a certain range.

4. A moving subject detecting apparatus according to claim 1, the moving subject detecting apparatus further comprising:

a first response pattern classifying unit operable to specify a representative first response pattern by storing the first response patterns specified by the response pattern extracting unit and classifying a plurality of the stored first response patterns;

a second response pattern classifying unit operable to specify a representative second response pattern by storing the second response patterns specified by the response pattern extracting unit and classifying a plurality of the stored second response patterns;

wherein the judging unit judges that the moving subject moved from the first area to the second area according to the representative first response pattern when the representative first response pattern specified by the first response pattern classifying unit and the representative second response pattern specified by the second response pattern classifying unit are in a time reversal correlation with each other.

5. A moving subject detecting apparatus according to claim 4,

wherein the first response pattern classifying unit specifies the representative first response pattern based on the Cluster Analysis, and

the second response pattern classifying unit specifies the representative second response pattern based on the Cluster Analysis.

6. A moving subject detecting apparatus according to claim 4,

wherein the first response pattern classifying unit specifies the representative first response pattern based on Self-organization Algorithm, and

the second response pattern classifying unit specifies the representative second response pattern based on Self-organization Algorithm.

7. A moving subject detecting apparatus according to claim 4,

wherein the judging unit judges that the representative first response pattern and the representative second response pattern are in a time reversal correlation with each other when the time in the representative first response pattern after the first area changed from the detection state to the no detection state until the second area changes from the no detection state to the detection state is equal to the time in the representative second response pattern after the second area changes from the detection state to the no detection state until the first area changes from the no detection state to the detection state within a certain range.

8. A moving subject detecting apparatus according to claim 7,

wherein the judging unit further judges that the representative first response pattern and the representative second response pattern are in a time reversal correlation with each other when the duration time of the detection state in the first area and the duration time of the detection state in the second area in the representative first response pattern are respectively equal to the duration time of the detection state in the first area and the duration time of the detection state in the second area in the representative second response pattern within a certain range.

9. A moving subject detection method for detecting a transfer of

a moving subject in space composed of a plurality of areas,

wherein at least one moving subject detecting sensor that detects movements of a moving subject is placed in the respective one of the plurality of the areas,

the moving subject detection method comprising:

a moving subject detection information generating step for generating moving subject detection information that shows a detection state in which the moving subject is detected or a no detection state in which the moving subject is not detected in the respective areas based on presence or absence of the moving subject detecting sensor response;

a response pattern extracting step for specifying a first response pattern in which, after a first area changes from a detection state to a no detection state, a second area changes from a no detection state to a detection state and a second response pattern in which, after a first area changes from a detection state to a no detection state, a first area changes from a no detection state to a detection state based on the generated moving subject detection information; and

a judging step for judging that the moving subject moved from the first area to the second area according to the first response pattern when the first response pattern and the second response pattern specified are in a time reversal correlation with each other.

10. A moving subject detection method according to claim 9, the moving subject detecting apparatus further comprising:

a first response pattern classifying step for specifying a representative first response pattern by storing the first response patterns specified in the response pattern extracting step and classifying a plurality of the stored first response patterns;

a second response pattern classifying step for specifying a representative second response pattern by storing the second response patterns specified in the response pattern extracting step and classifying a plurality of the stored second response patterns;

wherein in the judging step, a judgment that the moving subject moved from the first area to the second area according to the representative first response pattern is made when the representative first response pattern specified in the first response pattern classifying step and the representative second response pattern specified in the second response pattern classifying step are in a time reversal correlation with each other.

11. A program for a moving subject detecting apparatus detecting a transfer of a moving subject in space composed of a plurality of areas,

wherein at least one moving subject detecting sensor for detecting movements of a moving subject is placed in the respective one of the plurality of the areas,

the program comprising:

a moving subject detection information generating step for generating moving subject detection information that shows a detection state in which the moving subject is detected or a no detection state in which the moving subject is not detected in the respective areas based on presence or absence of the moving subject detecting sensor response;

a response pattern extracting step for specifying a first response pattern in which, after a first area changes from a detection state to a no detection state, a second area changes from a no detection state to a detection state and a second response pattern in which, after a second area changes from a detection state to a no detection state, a first area changes from a no detection state to a detection state based on the generated moving subject detection information; and

a judging step for judging that the moving subject moved from the first area to the second area according to the first response pattern when the first response pattern and the second response pattern specified are in a time reversal correlation with each other.

12. A program according to claim 11, the program further comprising:

a first response pattern classifying step for specifying a representative first response pattern by storing the first response patterns specified in the response pattern extracting step and classifying a plurality of the stored first response patterns;

a second response pattern classifying step for specifying a representative second response pattern by storing the second response patterns specified in the response pattern extracting step and classifying a plurality of the stored second response patterns;

wherein in the judging step, a judgment that the moving subject moved from the first area to the second area according to the representative first response pattern is made when the representative first response pattern specified in the first response pattern classifying step and the representative second response pattern specified in the second response pattern classifying step are in a time reversal correlation with each other.