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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
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.
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公开(公告)号：US20240223818A1
公开(公告)日：2024-07-04
申请号：US18604710
申请日：2024-03-14
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Weiwei XU , Jiantong ZHOU , Quanhe YU , Jinsong WEN , Yutong HU
IPC: H04N19/98 , G06T5/40 , H04N19/119
CPC classification number: H04N19/98 , G06T5/40 , H04N19/119
Abstract: Embodiments of this application provide a video encoding method, a video decoding method, and an apparatus. The video encoding apparatus may obtain source data, where the source data includes first high dynamic range HDR data and a first standard dynamic range SDR bitstream for same video data; map reconstructed data of the first SDR bitstream to second HDR data based on a correspondence between the reconstructed data of the first SDR bitstream and the first HDR data; determine a target residual value between the second HDR data and the first HDR data, where a bit width of the target residual value is less than or equal to a data bit width for encoding a first SDR video into the first SDR bitstream; encode the correspondence and the target residual value, to determine preset data; and transmit the first SDR bitstream to which the preset data is added.
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公开(公告)号：US20230164328A1
公开(公告)日：2023-05-25
申请号：US18150742
申请日：2023-01-05
Applicant: Huawei Technologies Co., Ltd.
Inventor： Weiwei XU , Haitao YANG , Yin ZHAO
IPC: H04N19/159 , H04N19/176 , H04N19/184
CPC classification number: H04N19/159 , H04N19/176 , H04N19/184
Abstract: Inter prediction method and apparatus are disclosed to resolve problems in the conventional technology that prediction samples obtained in an inter prediction mode are spatially discontinuous, prediction efficiency is affected, and prediction residual energy is relatively high. The method includes: parsing a bitstream to obtain motion information of a to-be-processed picture block; performing motion compensation on the to-be-processed picture block based on the obtained motion information, to obtain a prediction block of the to-be-processed picture block, where the prediction block of the to-be-processed picture block includes a prediction value of a target sample; and performing weighting calculation on one or more reconstructed values of one or more reference samples and the prediction value of the target sample, to update the prediction value of the target sample, where the reference sample(s) have a preset spatial position relationship with the target sample.
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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
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.
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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
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.
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Patent Agency Ranking
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
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.
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公开(公告)号：US20210185328A1
公开(公告)日：2021-06-17
申请号：US17249189
申请日：2021-02-23
Applicant: Huawei Technologies Co., Ltd.
Inventor： Weiwei XU , Haitao YANG , Yin ZHAO
IPC: H04N19/159 , H04N19/184 , H04N19/176
Abstract: Inter prediction method and apparatus are disclosed to resolve problems in the conventional technology that prediction samples obtained in an inter prediction mode are spatially discontinuous, prediction efficiency is affected, and prediction residual energy is relatively high. The method includes: parsing a bitstream to obtain motion information of a to-be-processed picture block; performing motion compensation on the to-be-processed picture block based on the obtained motion information, to obtain a prediction block of the to-be-processed picture block, where the prediction block of the to-be-processed picture block includes a prediction value of a target sample; and performing weighting calculation on one or more reconstructed values of one or more reference samples and the prediction value of the target sample, to update the prediction value of the target sample, where the reference sample(s) have a preset spatial position relationship with the target sample.
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公开(公告)号：US20250106405A1
公开(公告)日：2025-03-27
申请号：US18975891
申请日：2024-12-10
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Weiwei XU , Haitao YANG , Yin ZHAO
IPC: H04N19/159 , H04N19/176 , H04N19/184
Abstract: Inter prediction method and apparatus are disclosed to resolve problems in the conventional technology that prediction samples obtained in an inter prediction mode are spatially discontinuous, prediction efficiency is affected, and prediction residual energy is relatively high. The method includes: parsing a bitstream to obtain motion information of a to-be-processed picture block; performing motion compensation on the to-be-processed picture block based on the obtained motion information, to obtain a prediction block of the to-be-processed picture block, where the prediction block of the to-be-processed picture block includes a prediction value of a target sample; and performing weighting calculation on one or more reconstructed values of one or more reference samples and the prediction value of the target sample, to update the prediction value of the target sample, where the reference sample(s) have a preset spatial position relationship with the target sample.
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公开(公告)号：US20240221136A1
公开(公告)日：2024-07-04
申请号：US18604784
申请日：2024-03-14
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Weiwei XU , Jinsong WEN , Lei WU , Zhongke MA , Yanbing JIA , Quanhe YU , Zizhong WANG , Yichuan WANG , Hu CHEN
CPC classification number: G06T5/92 , G06T7/11 , G06T2207/10016 , G06T2207/10024 , G06T2207/20208
Abstract: This application provides a tone mapping method including: obtaining a to-be-displayed image frame and metadata which includes at least one metadata information unit; segmenting the to-be-displayed image frame into a plurality of segmentation regions in a target segmentation manner, and determining a correspondence between the plurality of segmentation regions and the at least one metadata information unit; and for an ith pixel: determining, for a plurality of pixels included in a preset region, at least one related segmentation region to which the plurality of pixels belong, and determining a related metadata information unit corresponding to each related segmentation region; obtaining a tone mapping subvalue corresponding to the related segmentation region, and allocating a corresponding weighting factor to the related segmentation region; obtaining a tone mapping value based on the tone mapping subvalue and the weighting factor; and performing tone mapping based on the tone mapping value.
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公开(公告)号：US20240153051A1
公开(公告)日：2024-05-09
申请号：US18411529
申请日：2024-01-12
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Weiwei XU , Quanhe YU , Hu CHEN , Yichuan WANG
CPC classification number: G06T5/92 , G06T3/16 , G06T5/50 , G06T7/11 , G06T2207/10016 , G06T2207/20208
Abstract: This application provides a tone mapping method and apparatus for a panoramic image. The tone mapping method includes: determining one or more target metadata information units of a first pixel from a plurality of metadata information units, where the plurality of metadata information units are obtained by parsing a bitstream, the first pixel is any pixel in a to-be-processed panoramic video two-dimensional planar projection, the plurality of metadata information units correspond to a plurality of segmented regions included in a panoramic video three-dimensional spherical representation panoramic image, and there is a mapping relationship between the panoramic video two-dimensional planar projection and the panoramic video three-dimensional spherical representation panoramic image; and performing tone mapping on a pixel value of the first pixel based on the one or more target metadata information units, to obtain a target tone mapping value of the first pixel.
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