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System and method for relating a passive sensor to a geographic environment

  • US 5,719,773 A
  • Filed: 05/15/1997
  • Issued: 02/17/1998
  • Est. Priority Date: 11/30/1992
  • Status: Expired due to Term
First Claim
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1. A system for relating a passive sensor to a geographic environment, the passive sensor being operable to sense an image of the geographic environment, comprising:

  • storage circuitry for storing map data representative of the geographic environment; and

    process circuitry coupled to said storage circuitry and to the passive sensor and operable to;

    extract at least one feature from the image;

    generate at least one feature from said map data; and

    relate at least one said extracted feature to at least one said generated feature, such that the passive sensor is related to the geographic environment, wherein said extracted feature comprises an observed horizon extracted from the image and wherein said generated feature comprises a synthetic horizon generated from said map data representative of the geographic environment as viewed by a hypothetical observer from an assumed pose.

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