Patents by Inventor Hung Yuet Wong

Hung Yuet Wong has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for digital image defect correction and noise filtering
    Patent number: 6747697
    Abstract: An adaptive median filter (40) provides dynamic detection and correction of digital image defects which are caused by defective or malfunctioning elements of a radiation detector array (20). The adaptive median filter receives (100) lines of pixel values of a digital image that may have defects and a user-defined defect threshold. The lines of pixel values are scanned on a pixel-by-pixel basis using a kernel of n×n pixels, where the kernel contains the candidate pixel being examined (120). Each kernel is numerically reordered (130) and a median value is calculated (140). A defect threshold value is calculated by multiplying the user-defined defect threshold criteria and the candidate pixel value (150). A reference value is calculated by subtracting the candidate pixel value and the median value (160). The reference value is compared to the defect threshold value (170).
    Type: Grant
    Filed: July 12, 2000
    Date of Patent: June 8, 2004
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Zhongmin Steve Lin, David Nicolay, Hung Yuet Wong