Automatic monitoring apparatus

• US 6,128,396 A
• Filed: 09/08/1997
• Issued: 10/03/2000
• Est. Priority Date: 04/04/1997
• Status: Expired due to Term

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Edanami, Takafumi, Hasegawa, Mitsuyo
• Primary Examiner(s): Au, Amelia
• Assistant Examiner(s): Wu, Jingge
• Application Number:
  US08/925,406
• Time in Patent Office: 1,121 Days
• Field of Search: 382/103, 382/106, 382/107, 382/236, 348/149, 348/150, 348/151, 348/152, 348/153, 348/154, 348/155, 348/156, 348/161, 348/169, 348/143, 308/407
• US Class Current: 382/103
• CPC Class Codes: G08B 13/19602 Image analysis to detect motion of the intruder, e.g. by frame subtraction
• CPC Class Codes: G08B 13/19613 Recognition of a predetermined image pattern or behaviour pattern indicating theft or intrusion
• 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

Abstract

An automatic monitoring apparatus for automatically detecting an object to be detected, such as a suspicious person, based on the picture obtained from an image pickup device. Moving object detecting unit detects information about a moving object in the picture, based on the picture signal input from the image pickup device. Characteristic quantity calculating unit calculates a characteristic quantity of the moving object based on the information detected by the moving object detecting unit. Characteristic quantity storing unit stores at least a characteristic quantity relating to a non-detection object that should not be detected. Determining unit compares the characteristic quantity of the moving object, calculated by the characteristic quantity calculating unit, with the characteristic quantity stored in the characteristic quantity storing unit, to determine whether or not the moving object is an object to be detected. Storage commanding unit causes the characteristic quantity of the moving object, calculated by the characteristic quantity calculating unit, to be selectively stored in the characteristic quantity storing unit.

Claims

1. An automatic monitoring apparatus for automatically detecting a detection object to be detected, based on a picture obtained from an image pickup device, comprising:

moving object detecting means for detecting information about a moving object in the picture, based on a picture signal input from the image pickup device;

characteristic quantity calculating means for calculating a characteristic quantity of the moving object, based on the information detected by the said moving object detecting means;

characteristic quantity storing means for storing at least a characteristic quantity relating to a non-detection object that should not be detected; and

determining means for comparing the characteristic quantity calculated by said characteristic quantity calculating means with the characteristic quantity stored in said characteristic quantity storing means, to determine whether or not the moving object is an object to be detected;

wherein said characteristic quantity storing means includes;

first characteristic quantity storing means for storing the characteristic quantity relating to a non-detection object that should not be detected; and

second characteristic quantity storing means for storing the characteristic quantity relating to a detection object to be detected,

wherein said moving object detecting means includes;

inter-frame difference calculating means for calculating an inter-frame difference based on a frame picture signal input from the image pickup device,

intra-frame difference calculating means for calculating an intra-frame difference based on the frame picture signal, and

superposition detecting means for detecting a superposed region where the inter-frame difference supplied from said inter-frame difference calculating means and the intra-frame difference supplied from said intra-frame difference calculating means overlap each other.

2. The automatic monitoring apparatus according to claim 1, further comprising storage commanding means for causing the characteristic quantity calculated by said characteristic quantity calculating means to be stored in said characteristic quantity storing means.

3. The automatic monitoring apparatus according to claim 1, further comprising characteristic quantity transfer means for transferring the characteristic quantity stored in said first characteristic quantity storing means to said second characteristic quantity storing means at a predetermined time.

4. The automatic monitoring apparatus according to claim 1, wherein said determining means includes

first distance calculating means for calculating a first distance between the characteristic quantity calculated by said characteristic quantity calculating means and the characteristic quantity stored in said first characteristic quantity storing means,

second distance calculating means for calculating a second distance between the characteristic quantity calculated by said characteristic quantity calculating means and the characteristic quantity stored in said second characteristic quantity storing means, and

detection object determining means for comparing the second distance with a predetermined threshold, and determining that the moving object is an object to be detected if the second distance is smaller than the predetermined threshold.

5. The automatic monitoring apparatus according to claim 4, wherein the predetermined threshold is determined in accordance with the first distance.

6. The automatic monitoring apparatus according to claim 1, wherein said characteristic quantity calculating means calculates a position and size of the moving object.

7. The automatic monitoring apparatus according to claim 1, wherein said characteristic quantity calculating means calculates a horizontal size-to-vertical size ratio of the moving object.

8. The automatic monitoring apparatus according to claim 1, wherein said characteristic quantity calculating means calculates color pattern information about the moving object.

9. The automatic monitoring apparatus according to claim 1, wherein said characteristic quantity calculating means calculates an amount of movement of the moving object.

10. The automatic monitoring apparatus according to claim 1, further comprising accumulating means for accumulating the characteristic quantity calculated by said characteristic quantity calculating means for a predetermined period of time, and

area setting means for setting a picture area with respect to which information about a moving object is to be detected by said moving object detecting means, by using the characteristic quantities accumulated by said accumulating means.