Method and apparatus for passive autoranging using relaxation
June 11, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesAuto focus system Optical target ranging apparatus Automatic gain control fiber optica-to-electrical transceiver Method and apparatus for determining the distances between surface-patches of a three-dimensional spatial scene and a camera system Passive ranging and rapid autofocusing Computational methods and electronic camera apparatus for determining distance of objects, rapid autofocusing, and obtaining improved focus images Automatic ranging and automatic focusing Patent #: 5231443 InventorApplicationNo. 075738 filed on 06/11/1993US Classes:382/318, Multiple scanning382/106, Range or distance measuring382/141Manufacturing or product inspectionExaminersPrimary: Mancuso, JosephAssistant: Fox, David T. Attorney, Agent or FirmInternational ClassesG06K 009/00G06K 009/36 AbstractA method and apparatus for passive autoranging. Two cameras having different image parameters (e.g., focal gradients) generate two images of the same scene. A relaxation procedure is performed using the two images as inputs to generate a blur spread. The blur spread may then be used to calculate the range of at least one object in the scene. In one preferred embodiment, a temporal relaxation procedure is employed to focus a third camera. In another preferred embodiment, a spatial relaxation procedure is employed to determine the range of a plurality of objects.Other References
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