Image change detection system
First Claim
1. An image change detection system for use with a vehicle to be monitored, comprising:
- means for sensing energy from a region proximate the vehicle and for generating a plurality of pixels which form an image of said region, each pixel representative of the energy received from a portion of said region;
memory means for storing a first image of said region from said means for sensing;
comparison means for matching pixels of a subsequent image of said region with pixels of said first image to detect deviations between corresponding pixels in the two images;
means, responsive to said comparison means, for indicating when the pixel deviations exceed a preselected threshold to detect an abnormal condition in said region; and
switch means, responsive to operation of a door of the vehicle, for enabling said means for sensing when the door is opened or closed.
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Abstract
An image change detection system for observing an environment to be monitored, such as a region proximate a vehicle, by sensing energy from the region and generating a plurality of pixels which form an image of the region. The system stores a first image of the region and matches pixels of a subsequent image of the region with pixels of the first image to detect deviations between corresponding pixels. The system indicates when the pixel deviations exceed a preselected threshold to detect an abnormal condition in the region. Also a method of monitoring the environment about a vehicle by sensing a first image, sensing a subsequent image, matching the pixels of the subsequent image with the pixels of the first image to detect deviations between corresponding pixels, and indicating when pixel deviations exceed a preselected threshold.
137 Citations
16 Claims
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1. An image change detection system for use with a vehicle to be monitored, comprising:
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means for sensing energy from a region proximate the vehicle and for generating a plurality of pixels which form an image of said region, each pixel representative of the energy received from a portion of said region; memory means for storing a first image of said region from said means for sensing; comparison means for matching pixels of a subsequent image of said region with pixels of said first image to detect deviations between corresponding pixels in the two images; means, responsive to said comparison means, for indicating when the pixel deviations exceed a preselected threshold to detect an abnormal condition in said region; and switch means, responsive to operation of a door of the vehicle, for enabling said means for sensing when the door is opened or closed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification