公开(公告)号：US20240397070A1

公开(公告)日：2024-11-28

申请号：US18793919

申请日：2024-08-04

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yichuan Wang ,  Quanhe Yu ,  Weiwei Xu ,  Hu Chen ,  Hongjie You

IPC: H04N19/30 ,  G06T3/40 ,  H04N9/64 ,  H04N19/136 ,  H04N19/182 ,  H04N19/70

Abstract: The present disclosure discloses an image processing method, apparatus, and a storage medium. The method includes: parsing an original bitstream of a to-be-processed image to obtain the to-be-processed image; parsing a first layered bitstream of the to-be-processed image to obtain a first layered image of the to-be-processed image; determining a second layered image of the to-be-processed image based on the to-be-processed image and the first layered image, where one of the first layered image and the second layered image is a base layer image, and the other of the first layered image and the second layered image is a detail layer image; performing tone mapping on the base layer image to obtain a mapping result of the base layer image; and fusing the mapping result of the base layer image and the detail layer image.

公开(公告)号：US20230054477A1

公开(公告)日：2023-02-23

申请号：US17982046

申请日：2022-11-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hu Chen ,  Yichuan Wang ,  Weiwei Xu ,  Quanhe Yu ,  Elena Alexandrovna Alshina

IPC: G06T5/00 ,  G06T5/10

Abstract: The present disclosure relates generally to the field of video processing, and more particularly, to high dynamic range (HDR) image processing. In particular, the present disclosure relates to a method for determining a parameter set for a tone mapping curve. The method comprises obtaining a plurality of parameter sets, wherein each parameter set defines the tone mapping curve, and wherein each parameter set is derived based on one of a plurality of HDR video frames. Further, the method comprises temporally filtering the plurality of parameter sets to obtain a temporally filtered parameter set.

公开(公告)号：US20230049334A1

公开(公告)日：2023-02-16

申请号：US17971086

申请日：2022-10-21

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hu Chen ,  Elena Alexandrovna Alshina ,  Weiwei Xu ,  Quanhe Yu ,  Yichuan Wang

IPC: H04N5/235 ,  G06T5/00 ,  H04N19/154 ,  G06V10/60

Abstract: This application provides a high dynamic range HDR video processing method, an encoding device, and a decoding device. The method includes: obtaining dynamic metadata of an Nth HDR video frame according to a dynamic metadata generation algorithm; calculating a tone-mapping (tone-mapping) curve parameter of the Nth HDR video frame based on the dynamic metadata of the Nth HDR video frame; generating a tone-mapping curve based on the curve parameter; determining, according to a quality assessment algorithm, distortion D′ caused by the tone-mapping curve; comparing D′ and DT, to determine a mode used by the Nth HDR video frame, where the mode is an automatic mode or a director mode, and DT is a threshold value; and determining metadata of the Nth HDR video frame based on the determined mode used by the Nth HDR video frame.

公开(公告)号：US20250045871A1

公开(公告)日：2025-02-06

申请号：US18713237

申请日：2022-11-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiangyu Hu ,  Weiwei Xu ,  Jinsong Wen ,  Yanbing Jia ,  Jiantong Zhou ,  Qiyan Zhai ,  Yihua Zeng ,  Quanhe Yu ,  Zizhong Wang ,  Yichuan Wang ,  Hu Chen ,  Jinqin Ai ,  Yutong Hu

IPC: G06T5/20 ,  G06F3/04845 ,  G06F3/04883

Abstract: This application provides a picture processing method. The method includes: The encoder side obtains a to-be-processed picture, obtains a plurality of groups of visual sensory experience parameters, and encodes the to-be-processed picture and the plurality of groups of visual sensory experience parameters. At a decoder side, the method includes: The decoder side obtains a to-be-processed picture, obtains a zoom-in operation instruction, obtains one or more groups of visual sensory experience parameters corresponding to one or more local pictures, and separately processes the corresponding local picture based on the one or more groups of visual sensory experience parameters to obtain a processed local picture.

公开(公告)号：US20230057829A1

公开(公告)日：2023-02-23

申请号：US17982221

申请日：2022-11-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hu Chen ,  Yichuan Wang ,  Weiwei Xu ,  Quanhe Yu ,  Elena Alexandrovna Alshina

IPC: G06T5/00 ,  G06T5/40

Abstract: The present disclosure relates generally to the field of video processing, and more particularly to high dynamic range (HDR) video and image processing. In particular, the present disclosure relates to determining one or more curve parameters of a tone mapping curve. For example, a device (encoder or decoder) may obtain a high dynamic range (HDR) video frame and metadata associated to the HDR video frame. The device further obtains a pair of anchor points, based on the HDR video frame and the metadata. The pair of anchor points comprises a first anchor point and a second anchor point of the tone mapping curve. Moreover, the device generates the one or more curve parameters of the tone mapping curve based on the pair of anchor points.

公开(公告)号：US20230325987A1

公开(公告)日：2023-10-12

申请号：US18336837

申请日：2023-06-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yichuan Wang ,  Quanhe Yu ,  Weiwei Xu ,  Hu Chen

IPC: G06T5/00 ,  G06T7/90

CPC classification number: G06T5/009 ,  G06T7/90 ,  G06T2207/20208 ,  G06T2207/10024

Abstract: Tone mapping methods and apparatus provide for receipt by a backend device may of metadata and an HDR image from a frontend device and the generation of a mapping curve based on feature parameters of the mapping curve included in the metadata. Tone mapping on the HDR image can be performed based on the mapping curve. The feature parameters of the mapping curve are determined by the frontend device based on a luminance distribution status of the HDR image. In this way, the mapping curve parameters are determined based on the luminance distribution status of the HDR image so that design of the mapping curve is more flexible, and display effect of the HDR image can be effectively improved.