Patents by Inventor Daniel Pettigrew

Daniel Pettigrew 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).

  • Processing image data
    Publication number: 20010028738
    Abstract: A method of modifying image colors in which a user identifies a source color (707) and a destination color (708) having a common luminance (704). Source and destination color volumes (821, 822) are defined by firstly identifying two points (811, 812) opposite in color to the source (707), and secondly by selecting the most distant of white or black (813) as another point. The source color volume (821) and destination color volume (822) have these three points in common. A transformation is then defined (804) to transform from the source to the destination volume. This transformation, when applied (805) to image colors, results in the color change intended by the user.
    Type: Application
    Filed: February 9, 2001
    Publication date: October 11, 2001
    Applicant: DISCREET LOGIC INC
    Inventors: Daniel Pettigrew, Francois Paquin
  • Processing image data
    Publication number: 20010028736
    Abstract: A method of matching image color and or luminance characteristics in an image processing system. In order to match an input image with a reference image, a color transformation M is initialized (601). An output image is copied (602) from the input image. The following sequence of operations is then repeated: Output and reference images are displayed on a system monitor. The user identifies (603) a highlight, shadow or overall region in both images. These regions are processed (604) to identify a difference (605). The difference is concatenated (606) onto transformation M. The output image is updated (607) by processing the input with M.
    Type: Application
    Filed: January 25, 2001
    Publication date: October 11, 2001
    Applicant: Discreet Logic Inc.
    Inventors: Daniel Pettigrew, Francois Paquin
  • Processing image data
    Publication number: 20010028735
    Abstract: A process of defining a color volume for use in a process of color keying, in which a foreground image (405) is composited against a background image (407). The foreground image (405) contains regions of a background color (723). The user defines diamond shaped areas (611, 621) in PbPr color dimensions, and luminance ranges (612, 622). Tolerance and softness volumes (613, 623) are defined in this way, and a transformation is defined for each. Foreground pixels are processed (602) to determine a background, foreground, or softness condition for a matte (406). Softness represents a partial mix of foreground and background. The mix level is calculated by re-centring (1201) the softness volume, and processing (1206) with an optional sharpness parameter (706).
    Type: Application
    Filed: January 18, 2001
    Publication date: October 11, 2001
    Applicant: DISCREET LOGIC INC.
    Inventors: Daniel Pettigrew, Francois Paquin