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Threat Detection Based on Radiation Contrast

  • US 20080144885A1
  • Filed: 10/16/2007
  • Published: 06/19/2008
  • Est. Priority Date: 10/16/2006
  • Status: Abandoned Application
First Claim
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1. A computer program product, tangibly embodied in a computer-readable media, the computer program product being operable to cause data processing apparatus to detect concealed objects of interest in a zone of interest in which human traffic is present by performing operations comprising:

  • receiving an image from a device comprising a focal plane array having a sensitivity to radiation having a wavelength from 3 to 15 micrometers, the image of the zone of interest in which the human traffic is present, and the human traffic being at a distance of 5 to 100 meters from the device;

    processing the image by applying one or more image processing techniques comprising gradient image processing to enhance edges based on discontinuities in thermal gradients;

    extracting features of the image in which the human traffic is present based on infrared radiation contrast associated with a human in the human traffic, the extracting comprising;

    detecting a plurality of edges, each of the edges being a result of thermal gradient discontinuities; and

    decomposing at least some of the edges into image features representing spatial objects in an image processing environment, the spatial objects comprising line segments and shapes, the image features represented by one or more data structures;

    generating a classification of the image features from a knowledge base populated with classifications of objects of interest being observed, concealed objects on a human;

    the classification generated by a rule processing engine to process the image features;

    the classifications comprising threats;

    the classifications generated by extracting features of images from the observed, concealed objects on the human to generate rules for the classifications; and

    displaying data characterizing the classification of the image features being associated with the human, the data characterizing a threat if the classification is one of the threats.

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