Abnormality supervising system

• US 4,737,847 A
• Filed: 09/30/1986
• Issued: 04/12/1988
• Est. Priority Date: 10/11/1985
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Works Ltd (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Works Ltd (Panasonic Holdings Corporation)
• Inventors: Furukawa, Satoshi, Himezawa, Hidekazu, Satake, Tadashi, Araki, Tsunehiko
• Primary Examiner(s): Britton, Howard W.
• Application Number:
  US06/913,842
• Time in Patent Office: 560 Days
• Field of Search: 358/105, 358/108, 358/219, 358/1
• US Class Current: 348/161
• CPC Class Codes: G08B 13/19602 Image analysis to detect motion of the intruder, e.g. by frame subtraction
• CPC Class Codes: G08B 13/19604 involving reference image or background adaptation with time to compensate for changing conditions, e.g. reference image update on detection of light level change
• CPC Class Codes: G08B 13/19606 Discriminating between target movement or movement in an area of interest and other non-signicative movements, e.g. target movements induced by camera shake or movements of pets, falling leaves, rotating fan
• CPC Class Codes: G08B 13/19652 Systems using zones in a single scene defined for different treatment, e.g. outer zone gives pre-alarm, inner zone gives alarm
• CPC Class Codes: G08B 13/19697 Arrangements wherein non-video detectors generate an alarm themselves
• CPC Class Codes: Y10S 706/911 Nonmedical diagnostics

Abstract

An abnormality supervising system compares an input picture with a previously stored reference picture having no abnormality, provides a compared picture signal to an abnormality discrimination means having preliminarily stored information for abnormality discrimination, and, upon presence of an abnormality, operates an output means for informing operation, whereby the abnormality discrimination means can effectively attain the abnormality discrimination on the basis of the preliminarily stored information, in a highly reliable manner.

Claims

1. An abnormality supervising system comprising a picture input means for monitoring a zone to be supervised, a picture processing means for comparing an input picture obtained from said picture input means with a reference picture stored and processing said input picture to obtain information necessary for an abnormality discrimination, an abnormality discrimination means including memory means for preliminarily storing reference information necessary for said abnormality discrimination and to be compared with said information obtained from said picture processing means to discriminate an abnormality of an object in said monitoring zone, an output means receiving an output of said abnormality discrimination means and a detection area setting means providing an output to said abnormality discrimination means, said output being of divided detection areas in said input picture and having respectively different warning levels.

3. A system according to claim 1, which further comprises means for discriminating a normal variation pattern from an abnormal variation pattern of said input picture.

4. A system according to claim 1, which further comprises means for extracting said object from said input picture, and means for tracking movement of said extracted object, said object tracking means comprising a first memory for said extracted object picture, a second memory for said extracted object picture, and a unit receiving outputs from said first and second memories to judge said movement in view of the relationship between both pictures.

5. A system according to claim 1, which further comprises means for extracting said object from said input picture, and means for tracking movement of said extracted object, said object tracking means including means for predicting a moving position of said object, and means for identifying the object.

6. A system according to claim 1, wherein said abnormality discrimination means discriminates said abnormality on the basis of a moving locus with time of said object.

7. A system according to claim 1, wherein said picture input means includes a plurality of picture pickup means installed for overlapping their monitoring zones on each other.

8. A system according to claim 1, wherein said picture processing means includes means for automatically setting a threshold value to convert said input picture to a binary picture and means for determining said threshold value on the basis of an average value of the luminance from a plurality of comparison pictures between said input and reference pictures.

9. A system according to claim 1, wherein said picture processing means comprises a diaphragm correcting means which provides an output thereof to said picture input means for correcting its diaphragm, said diaphragm correcting means including means for detecting a signal necessary for said diaphragm correction from signals of said input picture, means for setting a detection area for said signal detection, and diaphragm correction means for providing a diaphragm correction signal to said picture input means according to said signal obtained by said signal detecting means.

10. A system according to claim 1, wherein a plurality of said detection area setting means are provided for monitoring respectively each of a plurality of sections of said monitoring zone which is relatively broad.

11. A system according to claim 10, wherein said detection area setting means is provided for automatically setting monitoring sections of said monitoring zones.

12. A system according to claim 1, which further comprises means for shifting said detection areas as said object moves within said monitoring zone.

13. A system according to claim 12, wherein said detection area shifting means includes means for extracting said object from said input picture, a memory for storing a detection area set in the picture to enclose the object, and a coordinate conversion means for causing said detection area to be moved to keep enclosing the object moved.

2. A system according to claim 2, wherein said warning levels are changeable.

14. An abnormality supervising system comprising a picture input means for monitoring a zone to be supervised, a picture processing means for comparing an input picture obtained from said picture input means with a reference picture stored and processing said input picture to obtain information necessary for an abnormality discrimination, an abnormality discrimination means including memory means for preliminarily storing reference information necessary for said abnormality discrimination and to be compared with said information obtained from said picture processing means to discriminate an abnormality of an object in said monitoring zone, an output means receiving an output of said abnormality discrimination means, a detection area setting means providing an output to said abnormality discrimination means, said output being of divided detection areas in said input picture having respectively different warning levels, and a variation pattern memory means for storing a luminance variation pattern in abnormal state, an output of said variation pattern memory means being provided to said abnormality discrimination means.

15. A system according to claim 14, wherein said variation pattern is set to grasp said object moving from one of said areas which is low in said warning level to another area high in the warning level.

16. An abnormality supervising system comprising a picture input means for monitoring a zone to be supervised, a picture processing means for comparing an input picture obtained from said picture input means with a reference picture stored and processing said input picture to obtain information necessary for an abnormality discrimination, an abnormality discrimination means including memory means for preliminarily storing reference information necessary for said abnormality discrimination and to be compared with said abnormality discrimination and to be compared with said information obtained from said picture processing means to discriminate an abnormality of an object in said monitoring zone, an output means receiving an output of said abnormality discrimination means, a detection area setting means providing an output to said abnormality discrimination means, said output being of divided detection areas in said input picture and having respectively different warning levels, and means for providing to said input picture an attribute area in addition to said detection areas and storing a characteristic corresponding to said attribute area, an attribute ouput of said attribute area being provided to said abnormality discrimination means.

17. An abnormality supervising system comprising a picture input means for monitoring a zone to be supervised, a picture processing means for comparing an input picture obtained from said picture input means with a reference picture stored and processing said input picture to obtain information necessary for an abnormality discrimination, an abnormality discrimination means including memory means for preliminarily storing reference information necessary for said abnormality discrimination and to be compared with said information obtained from said picture processing means to discriminate an abnormality of an object in said monitoring zone, an output means receiving an output of said abnormality discrimination means, and said picture processing means comprising means for inhibiting renewal of said reference picture when said input picture has a luminance variation.

18. A system according to claim 17, wherein said reference picture is obtained by averaging signals of a plurality of said input pictures which are discriminated normal.

19. A system according to claim 18, wherein said input picture except any part thereof showing a variation keeps renewing said reference picture in said picture processing means.

20. An abnormality supervising system comprising a picture input means for monitoring a zone to be supervised, a picture processing means for comparing an input picture obtained from said picture input means with a reference picture stored and processing said input picture to obtain information necessary for an abnormality discrimination, an abnormality discrimination means including memory means for preliminarily storing reference information necessary for said abnormality discrimination and to be compared with said information obtained from said picture processing means to discriminate an abnormality of an object in said monitoring zone, an output means receiving an output of said abnormality discrimination means, and said reference picture being plurally provided in said picture processing means.

21. A system according to claim 20, which further comprises means for preparing another reference picture for eliminating minor noise.

22. An abnormality supervising system comprising a picture input means for monitoring a zone to be supervised, a picture processing means for comparing an input picture obtained from said picture input means with a reference picture stored and processing said input picture to obtain information necessary for an abnormality discrimination, an abnormality discrimination means including memory means for preliminarily storing reference information necessary for said abnormality discrimination and to be compared with said information obtained from said picture processing means to discriminate an abnormality of an object in said monitoring zone, an output means receiving an output of said abnormality discrimination means, and said abnormality discrimination means receiving an output of an external sensor together with said input picture.

23. A system according to claim 22, wherein said external sensor is a distance sensor.

24. A system according to claim 22, wherein said external sensor is a temperature sensor.

25. A system according to claim 22, wherein said external sensor is a sensor for detecting an object located at a dead angle position of said monitoring zone in said input picture.

26. An abnormality supervising system comprising a picture input means for monitoring a zone to be supervised, a picture processing means for comparing an input picture obtained from said picture input means with a reference picture stored and processing said input picture to obtain information necessary for an abnormality discrimination, an abnormality discrimination means including memory means for preliminarily storing reference information necessary for said abnormality discrimination and to be compared with said information obtained from said picture processing means to discriminate an abnormality of an object in said monitoring zone, an output means receiving an output of said abnormality discrimination means, and said picture processing means providing an output to a gate upon overflowing of an A/D converting means, said gate providing a clock signal to a counting means while the gate is on, and said counting means providing an output to said abnormality discriminating means to stop said abnormality discrimination upon reaching a predetermined count.

27. An abnormality supervising system comprising a picture input means for monitoring a zone to be supervised, a picture processing means for comparing an input picture obtained from said picture input means with a reference picture stored and processing said input picture to obtain information necessary for an abnormality discrimination, an abnormality discrimination means including memory means for preliminarily storing reference information necessary for said abnormality discrimination and to be compared with said information obtained from said picture processing means to discriminate an abnormality of an object in said monitoring zone, an output means receiving an output of said abnormality discrimination means, and said picture input means including a plurality of picture pickup means, and means for switching outputs of said plurality of picture pickup means upon presence of luminance variation in said input picture.

28. A system according to claim 27, wherein said switching means is a multiplexer.

29. An abnormality supervising system comprising a picture input means for monitoring a zone to be supervised, a picture processing means for comparing an input picture obtained from said picture input means with a reference picture stored and processing said input picture to obtain information necessary for an abnormality discrimination, an abnormality discrimination means including memory means for preliminarily storing reference information necessary for said abnormality discrimination and to be compared with said information obtained from said picture processing means to discriminate an abnormality of an object in said monitoring zone, an output means receiving an output of said abnormality discrimination means, and said picture input means including color-picture pickup means, and means for extracting only hue components from a picture signal output of said color-picture pickup means and providing said hue components to said picture processing means.