Image filtering apparatus and method
Patent 4783839 Issued on November 8, 1988. Estimated Expiration Date: 
August 12, 2006. 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.
August 12, 2006. 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 ReferencesAcoustic examination methods and apparatus Adaptive pulse processing means and method Frequency diversity for image enhancement Patent #: 4561019 InventorAssigneeApplicationNo. 06/903565 filed on 08/12/1986US Classes:382/261, Adaptive filter348/163, Sonic or ultrasonic367/43, Filters382/128Biomedical applicationsExaminersPrimary: Shepperd, John W.Assistant: Parker, Michael D. Attorney, Agent or FirmInternational ClassesG06T 7/40 (20060101)H03H 21/00 (20060101) G01S 13/00 (20060101) G01S 13/89 (20060101) G01S 7/02 (20060101) G01S 7/52 (20060101) G01S 7/41 (20060101) Foreign Application Priority Data1984-12-12 GBAbstractIn an image processing system for elimination of speckle a signal derived from a scan is passed to a statistical processor (21). An output characteristic of a statistical parameter of the local value of this image signal is passed to a comparator (4) and compared with a reference characteristic of speckle to derive a control signal for a variable bandwidth filter (6) used to enhance the image.Other References
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