Object detecting method and object detecting apparatus and intruding object monitoring apparatus employing the object detecting method
First Claim
1. An object detecting method for detecting an object in a predetermined monitor area, comprising the steps of:
- imaging a plurality of different areas in said predetermined monitor area having no object at a predetermined time by an imaging device and registering respective images corresponding to said different areas having no image of said object to be detected;
at a different time from said predetermined time, imaging said predetermined monitor area by said imaging device;
comparing an image from said imaging device with a corresponding one of said plurality of registered images; and
detecting said object to be detected based on a result of the comparison,wherein said plurality of registered images are reference background sequential images and said step of comparing is subtraction processing between said image from said imaging device and said corresponding one of said reference background sequential images.
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Abstract
An object detecting method, object detecting apparatus and intruding object monitoring apparatus employing the object detecting method. A predetermined monitor area having no object to be detected is imaged by an imaging device and reference background sequential images are registered in advance in a storage unit. When monitoring, the predetermined monitor area is imaged by the imaging device while at the same time sequentially outputting the images frame by frame from the imaging device, a reference background image corresponding to the image from the imaging device is selected from the reference background sequential images, subtraction processing is carried out between the image from the imaging device and a corresponding reference background image, and the object detecting processing is carried out based on the result of subtraction processing.
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Citations
35 Claims
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1. An object detecting method for detecting an object in a predetermined monitor area, comprising the steps of:
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imaging a plurality of different areas in said predetermined monitor area having no object at a predetermined time by an imaging device and registering respective images corresponding to said different areas having no image of said object to be detected; at a different time from said predetermined time, imaging said predetermined monitor area by said imaging device; comparing an image from said imaging device with a corresponding one of said plurality of registered images; and detecting said object to be detected based on a result of the comparison, wherein said plurality of registered images are reference background sequential images and said step of comparing is subtraction processing between said image from said imaging device and said corresponding one of said reference background sequential images. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An object detecting method for detecting an object in a predetermined monitor area, comprising the steps of:
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imaging a plurality of different areas in the predetermined monitor area at a predetermined time by the imaging device in accordance with a predetermined scanning pattern, and registering respective reference background sequential images corresponding to said different areas in a storage device; at a different time from said predetermined time, imaging said predetermined monitor area by said imaging device substantially in accordance with said predetermined scanning pattern in synchronism with the operation of reading said registered reference background sequential images from the storage device; carrying out the subtraction processing between the images from the imaging device and the reference background sequential images read out; and carrying out object detection processing based on a result of the subtraction processing. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An object detecting apparatus for detecting an object located within a predetermined monitor area, comprising:
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an imaging device; an image input interface connected to said imaging device for converting a video signal of the imaging device to image data; a processing unit including a central processing unit and a memory for processing said image data; and a bus for interconnecting said image input interface and said processing unit; wherein in order to detect the object, said processing unit controls said object detecting apparatus such that; images from said imaging device imaging said predetermined monitor area having no object to be detected are stored sequentially in said memory, an image from said imaging device imaging said predetermined monitor area in accordance with a predetermined scanning pattern is sequentially inputted to said processing unit, an image having no object to be detected corresponding to said inputted image is read out of said memory, and said input image and said read image having no object to be detected are compared and based on a result of comparison, object detection processing is carried out, wherein said frame images having no image of said object to be detected are reference background sequential images and said comparing including subjecting said image from said imaging device and said corresponding image having no image of said object to be detected to subtraction processing.
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27. An image detecting apparatus for detecting an object located within a predetermined monitor area, comprising:
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an imaging device; an image input interface connected to said imaging device for converting a video signal of the imaging device to image data; a processing unit including a central processing unit and a memory for processing said image data; and a bus for interconnecting said image input interface and said processing unit, wherein in order to detect the object, said processing unit controls said object detecting apparatus to; store in said memory a plurality of images having different visual fields from said imaging device which images said predetermined monitor area at different visual fields, read out of said memory a stored image which corresponds to an image output from said imaging device, and compare said input image with said image read out of said memory and perform object detection processing based on said comparison. - View Dependent Claims (28, 29, 30, 31, 35)
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32. An object detecting apparatus for detecting an object within a predetermined monitor area, comprising:
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an imaging device; an image input interface connected to the imaging device for converting a video signal from the imaging device to image data; a processing unit including a central processing unit and a memory for processing the image data; and a bus for interconnecting the image input interface and the processing unit; wherein in order to detect the object, said processing unit controls said detecting apparatus such that; an image from said imaging device imaging said predetermined monitor area having no object to be detected is recorded in said memory beforehand as a reference background image of reference background sequential images; an image from the imaging device imaging the predetermined monitor area in accordance with a predetermined scanning pattern is sequentially inputted to the processing unit; a reference background image is read out of said reference background sequential images from the image memory in synchronism with picking up the input frame images; and a difference in a pixel value between the input image and the read reference background image is calculated for each pixel, and an area associated with a large difference value is detected as an object.
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33. A monitoring apparatus for monitoring an object intruding into a predetermined monitor area, comprising:
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an imaging device; an image input interface connected to the imaging device for converting a video signal from the imaging device to image data; a processing unit including a central processing unit and a memory for processing said image data; a monitor; and a bus for interconnecting said image input interface and said processing unit; wherein said processing unit controls said monitoring apparatus such that; each n-th image from the imaging device imaging the predetermined monitor area having no object to be detected is recorded in the memory beforehand as reference background sequential images, where n is an integer not less than unity; an image from the imaging device imaging the predetermined monitor area is sequentially input to the processing unit; a reference background image corresponding to the input image is read from the memory; and a difference in a pixel value between the input image and the reference background image corresponding to the input image read is calculated for each pixel, and an area associated with a large difference value is detected as an object and displayed on said monitor.
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34. A monitoring apparatus for monitoring an object intruding into a predetermined monitor area, comprising:
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an imaging device; an image input interface connected to said imaging device for converting a video signal from the imaging device to image data; a processing unit including a central processing unit and a memory for processing said image data; a monitor; and a bus for interconnecting the image input interface, the processing unit and the monitor; wherein said processing unit controls said monitoring apparatus such that; each n-th image from the imaging device imaging the predetermined monitor area having no object to be detected is recorded in the memory beforehand as reference background sequential images, where n is an integer not less than unity; images from the imaging device imaging the predetermined monitor area in accordance with a predetermined scanning pattern are sequentially input to the processing unit; reference background sequential images are read from the memory in synchronism with the operation of picking up the input images; and a difference in a pixel value between an input image and a reference background image read is calculated for each pixel, and an area associated with a large difference value is detected as an object and displayed on the monitor.
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Specification