Computerized video gait and motion analysis system and method
Patent 4631676 Issued on December 23, 1986. Estimated Expiration Date: 
December 23, 2003. 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.
December 23, 2003. 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 ReferencesApparatus for analyzing the forces acting on a human foot Kinesimetric method and apparatus Method and apparatus for recording gait analysis in podiatric diagnosis and treatment Patent #: 4416293 InventorApplicationNo. 06/497823 filed on 05/25/1983US Classes:600/595, Body movement (e.g., head or hand tremor, motility of limb, etc.)348/77, Human body observation356/620Special mark or target on objectExaminersPrimary: Smith, JerryAssistant: Meyer, Charles B. Attorney, Agent or FirmInternational ClassesA61B 5/103 (20060101)G06T 7/20 (20060101) AbstractA reflective marker is attached to the front and side of each joint of a subject whose motion or gait is to be analyzed. Each marker is formed of reflective tape and is relatively small and weightless and will not hinder or affect the subject's movements. A pair of Sony Video Motion Analyzers operating at sixty frames per second are positioned to the front and side of a walkpath having a marked centerline along which the subject walks; and coact with video cassette tape recorders to record the subject's movements along the runway. Monitors, provided for playback of the recorded video tape, are each provided with a built-in magnetic disk allowing ten seconds of high-speed motion to be recorded and displayed. A CAT-100 video analysis board, retrofitted into a Z 80 64K TE1 minicomputer, digitizes each recorded video frame to locate by x, y, (or z) coordinates the centroid of each marker and feeds the data into a PDP 11/70 computer which operates on the data to provide line and stick figure outputs of the data and which depict the motions under study; cyclograms of hip angle-knee angle relationships for a cycle of movement of the subject are also provided.Other References
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