Patents by Inventor Hung-ren Chen

Hung-ren Chen 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).

  • Automatic exposure control method and automatic exposure compensation apparatus
    Patent number: 7535511
    Abstract: An automatic exposure control method and compensation apparatus are disclosed. It includes a coordinate system having sub-ranges with different corresponding exposure compensation values. It includes the setting of bright and dark regions threshold values and the calculation of the ratios of the pixel count in an image where the luminance of each pixel is higher than the bright area threshold value for obtaining a bright area ratio, and also includes the calculation of the ratio of the pixel count in an image where the luminance of each pixel is lower than the dark area threshold value for obtaining a dark area ratio. Afterwards, the image position in the coordinate system is determined. When the image position in the coordinate system is fallen inside one of the sub-ranges, the corresponding exposure compensation value of the sub-range where the image is located is given to compensate the exposure value of the image.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: May 19, 2009
    Assignee: Sunplus Technology Co, Ltd.
    Inventors: Cheng-Yu Wu, Zhe-Hong Lin, Hung-ren Chen
  • Automatic exposure control method and automatic exposure compensation apparatus
    Publication number: 20070115372
    Abstract: An automatic exposure control method and compensation apparatus are disclosed. It includes a coordinate system having sub-ranges with different corresponding exposure compensation values. It includes the setting of bright and dark regions threshold values and the calculation of the ratios of the pixel count in an image where the luminance of each pixel is higher than the bright area threshold value for obtaining a bright area ratio, and also includes the calculation of the ratio of the pixel count in an image where the luminance of each pixel is lower than the dark area threshold value for obtaining a dark area ratio. Afterwards, the image position in the coordinate system is determined. When the image position in the coordinate system is fallen inside one of the sub-ranges, the corresponding exposure compensation value of the sub-range where the image is located is given to compensate the exposure value of the image.
    Type: Application
    Filed: June 14, 2006
    Publication date: May 24, 2007
    Inventors: Cheng-Yu Wu, Zhe-Hong Lin, Hung-ren Chen