公开(公告)号：US20240428385A1

公开(公告)日：2024-12-26

申请号：US18822644

申请日：2024-09-03

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Quanhe YU

IPC: G06T5/92

Abstract: An image processing method includes obtaining a target picture and an initial tone mapping curve of the target picture, determining a plurality of interpolation points based on luminance information and/or dynamic metadata of the target picture, and determining a spline function that passes through the plurality of interpolation points, where the spline function is smoothly connected to the initial tone mapping curve at at least one of the plurality of interpolation points the initial tone mapping curve is modified based on the spline function to obtain a modified tone mapping curve of the target picture; and tone mapping is performed on the target picture based on the modified tone mapping curve. This image processing apparatus enables a display device to vividly and realistically reproduce a scene in a real world.

公开(公告)号：US20240331117A1

公开(公告)日：2024-10-03

申请号：US18743607

申请日：2024-06-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Weiwei XU ,  Haitao YANG ,  Quanhe YU ,  Hu CHEN ,  Yichuan WANG

IPC: G06T5/90 ,  G06T7/11 ,  G06T15/00

CPC classification number: G06T5/90 ,  G06T7/11 ,  G06T15/00

Abstract: A dynamic range mapping method and apparatus for a panoramic video that relate to the field of video image processing are provided. The method includes: splitting a two-dimensional panoramic projection image corresponding to any frame of three-dimensional panoramic image in a panoramic video, to obtain a plurality of regions of the two-dimensional panoramic projection image; obtaining metadata of the two-dimensional panoramic projection image, where the metadata includes metadata information elements separately corresponding to the plurality of regions, and a metadata information element corresponding to one region includes dynamic mapping information of the region; determining dynamic mapping information of each pixel in a current angle of view range based on respective dynamic mapping information of the plurality of regions; and performing dynamic range mapping on each pixel in the current angle of view range, to obtain a two-dimensional panoramic projection image that is used for display or subsequent processing.

公开(公告)号：US20210076036A1

公开(公告)日：2021-03-11

申请号：US17099470

申请日：2020-11-16

Applicant: Huawei Technologies Co., Ltd. ,  Tsinghua University

Inventor： Quanhe YU ,  Jicheng AN ,  Jianhua ZHENG ,  Yongbing LIN ,  Liqiang WANG ,  Benben NIU ,  Ziwei WEI ,  Yun HE

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/46 ,  H04N19/176

Abstract: Embodiments of this application relate to the video coding and compression field, and disclose an encoding method and apparatus, and a decoding method and apparatus, to resolve a problem that an existing split mode cannot satisfy a relatively complex texture requirement. The decoding method specifically includes: parsing a bitstream to determine a basic split mode for a current to-be-decoded picture block and a target derivation mode for a subpicture block of the current to-be-decoded picture block; splitting the current to-be-decoded picture block into N subpicture blocks in the basic split mode, where N is an integer greater than or equal to 2; deriving one derived picture block from at least two adjacent subpicture blocks in the N subpicture blocks in the target derivation mode; and decoding the derived picture block.

公开(公告)号：US20230010907A1

公开(公告)日：2023-01-12

申请号：US17872240

申请日：2022-07-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Na ZHANG ,  Jicheng AN ,  Quanhe YU ,  Jianhua ZHENG

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/30 ,  H04N19/176

Abstract: An inter prediction method is provided, including: obtaining a first reference frame index and a first motion vector of a to-be-processed block (101); deriving a second reference frame index from the first reference frame index, where the second reference frame index is different from the first reference frame index (102); scaling the first motion vector to obtain a second motion vector (103); obtaining a first reference block of the to-be-processed block according to the first reference frame index and the first motion vector (104); obtaining a second reference block of the to-be-processed block according to the second reference frame index and the second motion vector (105); and weighting the first reference block and the second reference block to obtain a combined prediction block (106). Each reference list for inter prediction is allowed to include two groups of motion information, which helps improve an inter prediction effect.

公开(公告)号：US20210235084A1

公开(公告)日：2021-07-29

申请号：US17231825

申请日：2021-04-15

Applicant: Huawei Technologies Co., Ltd. ,  TSINGHUA UNIVERSITY

Inventor： Quanhe YU ,  Jianhua ZHENG ,  Liqiang WANG ,  Yun HE

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/146 ,  H04N19/176

Abstract: This application provides a picture block splitting method and an apparatus. The picture block splitting method in this application includes: obtaining a picture block in a to-be-processed picture, where the picture block is an object on which encoding is performed; determining, based on a length of a first side and a length of a second side of the picture block, a block splitting method used for the picture block, where the first side and the second side are two neighboring sides of the picture block, the first side is a horizontal line, and the second side is a vertical line; and splitting the picture block according to the block splitting method. In this application, an unnecessary block splitting method is omitted, operation overheads are reduced, and picture encoding efficiency is improved.

公开(公告)号：US20210021874A1

公开(公告)日：2021-01-21

申请号：US17062110

申请日：2020-10-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianhua ZHENG ,  Quanhe YU ,  Meng LI ,  Hai CHEN ,  Chen-Xiong ZHANG

IPC: H04N19/98 ,  H04N19/70 ,  H04N19/13 ,  H04N19/186

Abstract: A video coding mechanism is disclosed. The mechanism includes at least one pre-encoder configured to pre-encode a received input video signal, and output a pre-encoded video signal. The mechanism also includes an encoder configured to obtain the pre-encoded video signal from the pre-encoder, and encode the pre-encoded video signal as a bitstream for transmitting the bitstream to decoder for decoding.

公开(公告)号：US20240054623A1

公开(公告)日：2024-02-15

申请号：US18494247

申请日：2023-10-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hu CHEN ,  Quanhe YU ,  Weiwei XU ,  Jiantong ZHOU ,  Ruihua LI

IPC: G06T5/00 ,  G06T5/40 ,  G06T7/50

CPC classification number: G06T5/009 ,  G06T5/40 ,  G06T7/50 ,  G06T2207/10012 ,  G06T2207/10024 ,  G06T2207/20208

Abstract: This application relates to the field of image processing technologies, and discloses an image processing method and system, and a device, to resolve a problem that tone mapping greatly affects perception of a binocular 3D image. Based on a disparity map of a binocular image, a tone mapping curve is determined for a display device to display an image, instead of being generated merely based on image content. This makes a contrast of a tone mapped binocular image reach at least a level before tone mapping, thereby meeting a minimum disparity variation requirement for 3D perception by human eyes, and improving 3D perception of a 3D image displayed by the display device.

公开(公告)号：US20230054046A1

公开(公告)日：2023-02-23

申请号：US17975893

申请日：2022-10-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Weiwei XU ,  Quanhe YU ,  Hu CHEN ,  Yichuan WANG

IPC: G06T5/00 ,  G06V10/60 ,  G09G3/34

Abstract: This application provides a dynamic range mapping method and apparatus. The dynamic range mapping method includes: obtaining a display parameter of a terminal device; obtaining feature information of image data; obtaining a first parameter of a first tone mapping curve of the image data; when a preset condition is met, obtaining a second parameter of a second tone mapping curve based on the first parameter, the display parameter of the terminal device, and the feature information of the image data, where output luminance at a first point on the second tone mapping curve is not greater than input luminance at the first point on the second tone mapping curve; and performing dynamic range mapping on the image data based on the second parameter of the second tone mapping curve.

公开(公告)号：US20220239880A1

公开(公告)日：2022-07-28

申请号：US17659253

申请日：2022-04-14

Applicant: Huawei Technologies Co., Ltd.

Inventor： Weiwei XU ,  Quanhe YU ,  Hu CHEN ,  Xiaodong XU

IPC: H04N9/68 ,  H04N9/77

Abstract: A chrominance adjustment method and apparatus, and a storage medium are provided. The method includes: determining a color adjustment coefficient of a chrominance component of a color signal based on a reference display device maximum luminance value (RML) and/or a source maximum luminance value (SML); and adjusting the chrominance component of the color signal based on the color adjustment coefficient.

公开(公告)号：US20210014492A1

公开(公告)日：2021-01-14

申请号：US17037192

申请日：2020-09-29

Applicant: Huawei Technologies Co., Ltd. ,  TSINGHUA UNIVERSITY

Inventor： Liqiang WANG ,  Jianhua ZHENG ,  Quanhe YU ,  Yongbing LIN ,  Yun HE

IPC: H04N19/12 ,  H04N19/176 ,  H04N19/167 ,  H04N19/119 ,  H04N19/70

Abstract: The present disclosure provide a transform method in picture block encoding, an inverse transform method in picture block decoding, and an apparatus. The inverse transform method includes: determining, in a target transform set, a corresponding transform pair of each region of at least two regions that constitute a to-be-decoded current block; inverse transforming each region based on the corresponding transform pair of each region to obtain an inverse transform result of each region; and obtaining an inverse transform result of the current block based on the inverse transform result of each region and a position of each region in the current block, where the at least two regions do not overlap each other, the target transform set includes a correspondence between a transform pair and a position of a region in the current block, and the transform pair includes a horizontal transform core and a vertical transform core.