Surveillance apparatus and recording medium recorded surveillance program
First Claim
1. A surveillance apparatus comprising:
- input means for inputting images in a time series;
background image memory means for registering a plurality of background images from said images;
difference image memory means for calculating a minimum value of difference degree of an absolute value of a difference between said background image and an image afresh inputted for each pixel and storing said difference; and
judgment means for judging an existence/absence of an invading object on the basis of said difference degree.
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Accused Products
Abstract
An economical surveillance apparatus robust to an environmental change includes an input unit for inputting images in a time series, a background image memory unit for storing a plurality of input images, a difference image memory unit for calculating and storing difference degree between a plurality of background images of the background image memory unit and an image inputted afresh, and a judging unit for judging an existence/absence of an invading object by utilizing the value of the difference degree of the difference image memory unit. This surveillance apparatus can automatically register a plurality of background images from a camera image. Since the background images that are no longer used are automatically erased, the drop of detection speed and detection sensitivity can be prevented.
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Citations
10 Claims
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1. A surveillance apparatus comprising:
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input means for inputting images in a time series;
background image memory means for registering a plurality of background images from said images;
difference image memory means for calculating a minimum value of difference degree of an absolute value of a difference between said background image and an image afresh inputted for each pixel and storing said difference; and
judgment means for judging an existence/absence of an invading object on the basis of said difference degree. - View Dependent Claims (2, 3, 4, 5)
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6. A recording medium having recorded thereon a surveillance program executed by a computer including input/output means, a CPU and a memory, said program comprising the steps of:
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inputting in a time series images from said input/output means;
registering a plurality of background images from said images into said memory;
calculating a minimum value of difference degree of an absolute value of a difference between said background image and an image inputted afresh for each pixel, and storing said minimum value in said memory; and
judging an existence/absence of an invading object on the basis of said difference degree. - View Dependent Claims (7, 8, 9, 10)
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Specification