Patents by Inventor James R. Boyack

James R. Boyack 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).

  • Brightness adjustment of images using digital scene analysis
    Patent number: 5724456
    Abstract: A system and method for processing a digital image signal which represents an image can be made to optimally map luminance values versus a tonal reproduction capability of a destination application. Specifically, the system includes a device for partitioning the image into blocks, then combining certain blocks into sectors. An average luminance block value is determined for each block and a difference is determined between the maximum and minimum average luminance block values for each sector. If the difference exceeds a predetermined threshold value, then the sector is labeled as an active sector and an average luminance sector value is obtained from maximum and minimum average luminance block values.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: March 3, 1998
    Assignee: Polaroid Corporation
    Inventors: James R. Boyack, Andrew K. Juenger