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Object-detecting system for optical instrument

  • US 5,602,944 A
  • Filed: 10/31/1994
  • Issued: 02/11/1997
  • Est. Priority Date: 06/26/1990
  • Status: Expired due to Term
First Claim
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1. An object detecting system for an optical instrument having two image sensors that receive light from objects in a field of view through different optical paths, each image sensor producing a group of total image data representing images of the objects in the field of view, comprising:

  • subgroup sampling means for forming a plurality of paired subgroups of image data from each of said groups of total image data as an inclination angle of an associated portion of the field of view is changed as a variable, each of said plurality of paired subgroups of image data corresponding to a portion of the field of view, said paired subgroup of image data having different inclination angles with respect to an optical axis of said optical instrument;

    correlation testing means for obtaining correlation data between both subgroups in each of said paired subgroups of image data as an amount of shifting of image data in the paired subgroups is changed as a variable; and

    means for distinguishing clusters of local maximum correlation points on the basis of a predetermined set of criteria, each point is associated with said amount of shifting of image data which corresponds to a maximum correlation in its paired subgroup and also associated with said inclination angles of its paired subgroup.

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