公开(公告)号：WO2023009392A1

公开(公告)日：2023-02-02

申请号：PCT/US2022/037991

申请日：2022-07-22

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： WANAT, Robert ,  CHOUDHURY, Anustup Kumar Atanu ,  ATKINS, Robin

IPC: G06T5/00

Abstract: Methods and systems for dynamic range conversion and display mapping of standard dynamic range (SDR) images onto high dynamic range (HDR) displays are described. Given an SDR input image, a processor generates an intensity (luminance) image and optionally a base layer image and a detail layer image. A first neural network uses the intensity image to predict statistics of the SDR image in a higher dynamic range. These predicted statistics together with the original image statistics of the input image are used to derive an optimal tone-mapping curve to map the input SDR image onto an HDR display. Optionally, a second neural network, using the intensity image and the detail layer image, can generate a residual detail layer image in a higher dynamic range to enhance the tone-mapping of the base layer image into the higher dynamic range.

公开(公告)号：WO2022245624A1

公开(公告)日：2022-11-24

申请号：PCT/US2022/028928

申请日：2022-05-12

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： WANAT, Robert

IPC: G09G5/00 ,  G09G5/02 ,  G06T5/00 ,  H04N1/40 ,  H04N5/202 ,  H04N5/58

Abstract: Methods are disclosed for adaptive display management using one or more viewing environment parameters. Given the one or more viewing environment parameters, an effective luminance range for a target display, and an input image, a tone-mapped image is generated based on a tone-mapping curve, an original PQ luminance mapping function, and the effective luminance range of the display. Corrected PQ (PQ') luminance mapping functions are generated according to the viewing environment parameters and, optionally, the transmissivity properties and reflectivity properties of the target display. PQ-to-PQ' mappings are generated, where each corrected (PQ') luminance mapping function is associated with a different set of viewing environment parameters and is associated with a different region of the display and where codewords in the original PQ luminance mapping function are mapped to codewords in the corrected (PQ') luminance mapping functions, and an adjusted tone-mapped image is generated based on the PQ-to-PQ' mappings.

公开(公告)号：WO2018175337A1

公开(公告)日：2018-09-27

申请号：PCT/US2018/023171

申请日：2018-03-19

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： ATKINS, Robin ,  BROOKS, David ,  PYTLARZ, Jaclyn Anne ,  MCELVAIN, Jon S. ,  WANAT, Robert

IPC: G06T5/00

CPC classification number: G06T5/009 ,  G06T2207/10024

Abstract: Input scene images are captured from an original scene. The input scene images may be represented in an input color space. The input scene images are converted into color-space-converted scene images in one of an LMS color space, an ICtCp color space, etc. Scene light levels represented in the color-space-converted scene images are mapped, based at least in part on an optical transfer function, to mapped light levels. A tone mapping is applied to the mapped light levels to generate corresponding display light levels to be represented in display images. The display images may be rendered on a target display.