Patents by Inventor Charles E. Farnung

Charles E. Farnung 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).

  • Data processing methods and devices
    Patent number: 6970598
    Abstract: For segmenting an image, a segmentation mode is selected by a user. If the segmentation mode is the automatic segmentation mode, the user is allowed to input a new value for automatic segmentation parameters. Thus, the image is segmented using the automatic segmentation parameter values, including any new automatic segmentation parameter values.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: November 29, 2005
    Assignee: Xerox Corporation
    Inventors: Ramesh Nagarajan, Julie A. Fisher, Charles E. Farnung, Francis K. Tse
  • Systems and methods that determine an image processing system tone reproduction curve
    Patent number: 6842266
    Abstract: An image processing system receives image input terminal information and image output terminal information. Based on the content of the image input terminal information and the image output terminal information a new system tone reproduction curve is determined. This device independent methodology allows system tone reproduction curves to be generated as needed, and allows the additional flexibility for changes in the image input terminal or the image output terminal.
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: January 11, 2005
    Assignee: Xerox Corporation
    Inventors: Charles E. Farnung, Ramesh Nagarajan, Francis Tse, Julie A. Fisher, Regina M. Loverde
  • Systems and methods to determine a contrast and a brightness adjusted system tone reproduction curve
    Patent number: 6753987
    Abstract: Contrast and brightness adjustments can be made to a system tone reproduction curve. These contrast and brightness adjustments can be made, for example, by user, via a user input device, or alternatively, automatically detected, based on an image analysis routine. By determining one or more generic tone reproduction curves, and interpolating these tone reproduction curves with the system tone reproduction curve, a new, adjusted tone reproduction curve is produced. This allows for a determination of the adjusted system tone reproduction curve as opposed to calculating and restoring the families of system tone reproduction curves adjusted for all the possible combinations of contrast and brightness.
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: June 22, 2004
    Assignee: Xerox Corporation
    Inventors: Charles E. Farnung, Ramesh Nagarajan, Francis Tse, Julie A. Fisher, Regina M. Loverde, Ralph H. Huedepohl
  • Black point adjustment based on image background
    Patent number: 6618171
    Abstract: A digital scanner or copier is provided that can dynamically adjust the black point of an image to be scanned based on detected background level of the document. A pre-scan acts on a small scanning window near a leading edge of the document to obtain a histogram of grey-level values. From this, the background level of the document can be obtained to determine a white point of the image. Additionally, a black point of the image is originally set to a default offset value. However, an adjustment factor based on the detected white point is used to adjust the default offset value to a value that increases the dynamic range of the output image, while still maintaining solid black for black areas of the image.
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: September 9, 2003
    Assignee: Xerox Corporation
    Inventors: Francis Tse, Ramesh Nagarajan, Charles E. Farnung