Vehicle monitoring system

  • US 5,809,161 A
  • Filed: 03/22/1993
  • Issued: 09/15/1998
  • Est. Priority Date: 03/20/1992
  • Status: Expired due to Term
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First Claim
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1. An object monitoring system comprisingcamera means for generating images of an area and for acquiring an image of a predetermined object, andimage processing means including:

  • means for subtracting a background image of said area from said images of said area to generate difference images representative of moving objects in said area;

    segmentation means for processing said difference images to generate region images representative of regions corresponding to parts of said moving objects in said area;

    classification means for processing and classifying said region images, said classification means includingmeans for analyzing the shape of said regions and, on the basis of the analysis, determining valid regions and invalid regions,clustering means for rejecting said invalid regions and generating, on the basis of the geometry of said valid regions, clusters corresponding to respective ones of said moving objects, andmeans for classifying said clusters by comparing at least one characteristic of said clusters to classification data of said system to determine if one of said clusters corresponds to said predetermined object; and

    tracking means for tracking said one of said clusters corresponding to said predetermined object to determine an image acquisition time for acquiring said image of said predetermined object.

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