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Adaptively reducing offset in a thermal imaging camera

  • US 7,122,788 B1
  • Filed: 10/08/2004
  • Issued: 10/17/2006
  • Est. Priority Date: 10/08/2004
  • Status: Active Grant
First Claim
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1. A method for collecting a plurality of samples for adjusting a signal, comprising:

  • providing a shutter in an opened position to substantially allow a detector of an infrared camera to detect infrared radiation comprising information about a scene;

    generating a signal corresponding to the infrared radiation;

    initiating a first touchup iteration by moving the shutter to a closed position to substantially prevent the detector from detecting the infrared radiation;

    collecting a plurality of first samples of a reference frame according to a collection instruction;

    moving the shutter to the opened position to allow the detector to detect the infrared radiation;

    establishing that there is a change in a state of the infrared camera from a first state to a second state;

    adjusting the collection instruction in response to the change;

    initiating a second touchup iteration by moving the shutter to the closed position;

    collecting a plurality of second samples of the reference frame according to the adjusted collection instruction; and

    determining a modification of the signal in accordance with at least one of the first samples and the second samples.

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