Patents Assigned to Dolby Laboratoreis Licensing Corporation
  • Patent number: 10397576
    Abstract: In a system for coding high dynamic range (HDR) images using lower-dynamic range (LDR) images, a reshaping function allows for a more efficient distribution of the codewords in the lower dynamic range images for improved compression. A trim pass of the LDR images by a colorist may satisfy a director's intent for a given “look,” but may also result in unpleasant clipping artifacts in the reconstructed HDR images. Given an original forward reshaping function which maps HDR luminance values to LDR pixel values, a processor identifies areas of potential clipping and generates modified forward and backward reshaping functions to reduce the visibility of potential artifacts from the trim pass process while preserving the director's intent.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: August 27, 2019
    Assignee: Dolby Laboratoreis Licensing Corporation
    Inventors: Harshad Kadu, Guan-Ming Su