公开(公告)号：US20220398710A1

公开(公告)日：2022-12-15

申请号：US17344843

申请日：2021-06-10

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Robert WANAT ,  Robin ATKINS ,  Anustup Kumar Atanu CHOUDHURY ,  Scott DALY ,  Jaclyn Anne PYTLARZ

IPC: G06T7/00 ,  G06T5/00 ,  G06T5/50

Abstract: Methods and systems for generating an image quality metric are described. A reference and a test image are first converted to the ITP color space. After calculating difference images ΔI, ΔT, and ΔP, using the color channels of the two images, the difference images are convolved with low pass filters, one for the I channel and one for the chroma channels (I or P). The image quality metric is computed as a function of the sum of squares of filtered ΔI, ΔT, and ΔP values. The chroma low-pass filter is designed to maximize matching the image quality metric with subjective results.

公开(公告)号：US20240354914A1

公开(公告)日：2024-10-24

申请号：US18685861

申请日：2022-08-23

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Anustup Kumar Atanu CHOUDHURY ,  Robin ATKINS

IPC: G06T5/90 ,  G06T5/60

CPC classification number: G06T5/90 ,  G06T5/60 ,  G06T2207/10016 ,  G06T2207/10024 ,  G06T2207/20016

Abstract: Methods and systems for precision rendering in display mapping using neural networks are described. Given an intensity input image, a sequence of neural networks comprising a pyramid-halving sub-network, a pyramid down-sampling sub-network, a pyramid-up-sampling sub-network, and a final-layer generation sub-network generate a base layer image and a detail layer image to be used in display mapping.

公开(公告)号：US20250111475A1

公开(公告)日：2025-04-03

申请号：US18846430

申请日：2023-03-17

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Shruthi Suresh ROTTI ,  Anustup Kumar Atanu CHOUDHURY

IPC: G06T3/4046 ,  G06T3/4053

Abstract: Methods and systems for the super resolution of high dynamic range (HDR) video are described. Given a sequence of video frames, a current frame and two or more neighboring frames are processed by a neural-network (NN) feature extraction module, followed by a NN upscaling module, and a NN reconstruction module. In parallel, the current frame is upscaled using traditional up-sampling to generate an intermediate up-sampled frame. The output of the reconstruction module is added to the intermediate up-sampled frame to generate an output frame. Additional traditional up-sampling may be performed on the output frame to match the desired up-scaling factor, beyond the up-scaling factor for which the neural network was trained.

公开(公告)号：US20240114153A1

公开(公告)日：2024-04-04

申请号：US18460377

申请日：2023-09-01

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Anustup Kumar Atanu CHOUDHURY ,  Guan-Ming SU

IPC: H04N19/184 ,  G06V10/25 ,  H04N19/117 ,  H04N19/172 ,  H04N19/59 ,  H04N19/98

CPC classification number: H04N19/184 ,  G06V10/25 ,  H04N19/117 ,  H04N19/172 ,  H04N19/59 ,  H04N19/98

Abstract: A first image and a second image of different dynamic ranges are derived from the same source image. Based on a chroma sampling format of the first image, it is determined whether edge preserving filtering is to be used to generate chroma upsampled image data in a reconstructed image. If so, image metadata for performing the edge preserving filtering is generated. The first image, the second image and the image metadata are encoded into an image data container to enable a recipient device to generate the reconstructed image.

公开(公告)号：US20210076042A1

公开(公告)日：2021-03-11

申请号：US16640332

申请日：2018-09-05

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Anustup Kumar Atanu CHOUDHURY ,  Robin ATKINS ,  Thaddeus BEIER ,  Ali ZANDIFAR ,  Ian GODIN

IPC: H04N19/136 ,  H04N19/70 ,  H04N19/186

Abstract: A method for generating metadata for use by a video decoder for displaying video content encoded by a video encoder includes: (1) accessing a target tone mapping curve; (2) accessing a decoder tone curve corresponding to a tone curve used by the video decoder for tone mapping the video content; (3) generating a plurality of parameters of a trim-pass function used by the video decoder to apply after applying the decoder tone curve to the video content, wherein the parameters of the trim-pass function are generated to approximate the target tone curve with the combination of the trim-pass function and the decoder tone curve, and (4) generating the metadata for use by the video decoder, including said plurality of parameters of the trim-pass function.

公开(公告)号：US20190180454A1

公开(公告)日：2019-06-13

申请号：US16214632

申请日：2018-12-10

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Anustup Kumar Atanu CHOUDHURY ,  Robin ATKINS ,  Tao CHEN

IPC: G06T7/254 ,  G06T7/11 ,  G06T7/194 ,  G06T7/40 ,  G06T7/13 ,  G06T7/155

Abstract: Motion characteristics related to foreground objects and background regions bordering the foreground objects in images are determined. A frame rate conversion (FRC)-related metadata portion is generated based on the motion characteristics. The FRC-related metadata portion is to be used for determining an optimal FRC operational mode with a downstream device for the images. The images are encoded into a video stream. The FRC-related metadata portion is encoded into the video stream as a part of image metadata. The video stream is caused to be transmitted to the downstream device.