Image monitoring method, image monitoring apparatus and storage media
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United States of America Patent
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Nov 1, 2005
Grant Date -
Oct 24, 2002
app pub date -
Feb 22, 2002
filing date -
Mar 2, 2001
priority date (Note) -
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Abstract
In order to detect abnormal objects with a low-cost arrangement at high speeds while avoiding unwanted influence of variations of a light source and/or regularly vibrating objects in the environment concerned, there is provided a block data calculation unit 4200 inputted from a camera into blocks, an object candidate extraction unit 4700 which compares image data of a frame to be processed and the immediately preceding frame in units of blocks to thereby extract an abnormal object candidate in accordance with the presence or absence of edges and a longitude-to-lateral edge ratio change rate, and an object judging unit 4800 for determining or 'judging' whether the abnormal object candidate is a true abnormal object, wherein it is an abnormal object where movement of the abnormal object candidate is traceable for a prespecified length of time period.
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