Patents by Inventor Ace Chien

Ace Chien 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 for auto-cropping a scanned image
    Patent number: 7912295
    Abstract: The present invention provides a method for dynamically refine the threshold values of R (Red), G (Green), B (Blue) colors for determining a borderline pixel in response to the values of a background image, thereby to precisely determine the borderlines of the Area of Interest (AOI). The method of the invention first searches the borderline pixels of a scanned image according to the standard differences of the R, G, B values of the pixels. Then, approximate the R, G, B threshold values of the borderline pixels by repeatedly averaging the current R, G, B values of the borderline pixels and the previous R, G, B threshold values until the difference is less than a predetermined value. The approximated R, G, B threshold values are set for the new R, G, B threshold values for determining the attribute of a pixel for subsequent prescanned images. Accordingly, the AOI can be automatically selected by reading the image circumscribed by the borderline pixels.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: March 22, 2011
    Assignee: Transpacific Optics LLC
    Inventor: Ace Chien
  • Method for auto-cropping a scanned image
    Patent number: 7418140
    Abstract: The present invention provides a method for dynamically refine the threshold values of R(Red), G(Green), B(Blue) colors for determining a borderline pixel in response to the values of a background image, thereby to precisely determine the borderlines of the Area of Interest (AOI). The method of the invention first searches the borderline pixels of a scanned image according to the standard differences of the R,G,B values of the pixels. Then, approximate the R,G,B threshold values of the borderline pixels by repeatedly averaging the current R,G,B values of the borderline pixels and the previous R,G,B threshold values until the difference is less than a predetermined value. The approximated R,G,B threshold values are set for the new R,G,B threshold values for determining the attribute of a pixel for subsequent prescanned images. Accordingly, the AOI can be automatically selected by reading the image circumscribed by the borderline pixels.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: August 26, 2008
    Assignee: Transpacific Optics LLC
    Inventor: Ace Chien
  • METHOD FOR AUTO-CROPPING A SCANNED IMAGE
    Publication number: 20070058864
    Abstract: The present invention provides a method for dynamically refine the threshold values of R(Red), G(Green), B(Blue) colors for determining a borderline pixel in response to the values of a background image, thereby to precisely determine the borderlines of the Area of Interest (AOI). The method of the invention first searches the borderline pixels of a scanned image according to the standard differences of the R,G,B values of the pixels. Then, approximate the R,G,B threshold values of the borderline pixels by repeatedly averaging the current R,G,B values of the borderline pixels and the previous R,G,B threshold values until the difference is less than a predetermined value. The approximated R,G,B threshold values are set for the new R,G,B threshold values for determining the attribute of a pixel for subsequent prescanned images. Accordingly, the AOI can be automatically selected by reading the image circumscribed by the borderline pixels.
    Type: Application
    Filed: August 31, 2006
    Publication date: March 15, 2007
    Inventor: Ace Chien