Object-detecting system for optical instrument
First Claim
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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Abstract
An object detecting system for an optical instrument having a pair of image sensors which receive light from objects in the field of view through different optical paths, each image sensor producing a group of image data representing the images of the objects in the field of view. Subgroups are formed from the groups of image data, wherein each subgroup represents image data corresponding to a portion of the field of view, and pairs of subgroups are formed with each pair of subgroups including one subgroup formed from each group of image data and both subgroups in each pair representing the same portion of the field of view. Consecutive overlapping segments of image data from each subgroup in each pair of subgroups are tested for high correlation between corresponding segments of image data from the subgroups of each pair. Clusters of segments of image data with high correlation are distinguished and one of the distinguished clusters is selected on the basis of a predetermined set of criteria.
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Citations
16 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16)
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10. A method of detecting an object 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 image data representing images of the objects in the field of view, comprising the steps of:
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forming a plurality of paired subgroups of image data from each of said groups of image data as an inclination angle of a portion of the field of view is changed as a variable, each of said paired subgroups corresponding to a portion of the field of view having a different inclination angle with respect to an optical axis of said optical instrument; obtaining correlation data between both of said paired subgroups of image data as an amount of shifting of image data in the paired subgroups is changed as variables; and identifying 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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Specification