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公开(公告)号：US20250005801A1
公开(公告)日：2025-01-02
申请号：US18884310
申请日：2024-09-13
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Hu CHEN , Zehui LIN , Quanhe YU , Kangying CAI , Rong WEI
IPC: G06T9/00
Abstract: The technology of this application relates to a probe data processing method and a probe data encoding method, and an apparatus. The probe data processing method in this application includes obtaining a bitstream, parsing the bitstream to obtain first probe data in a current probe data group, where the first probe data corresponds to a non-linear domain signal, obtaining a conversion function parameter of the current probe data group, obtaining an inverse conversion function of the current probe data group based on the conversion function parameter of the current probe data group, and performing spatial inverse conversion on the first probe data according to the inverse conversion function to obtain second probe data in the current probe data group, where the second probe data corresponds to one or more probes in a three-dimensional scene, and the second probe data corresponds to a linear domain signal.
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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：US20220245774A1
公开(公告)日：2022-08-04
申请号：US17720534
申请日：2022-04-14
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Quanhe YU , Haitao YANG , Jiantong ZHOU
Abstract: A high dynamic range image processing method and apparatus, to improve a display effect of a high dynamic range image. The method includes: obtaining image information of a to-be-processed high dynamic range (HDR) image, the image information includes a maximum RGB component value of a first pixel corresponding to a first percentage and a maximum RGB component value of a second pixel corresponding to a second percentage; determining a maximum reference value of the HDR image; determining a maximum luminance modification value of the HDR image based on the maximum reference value and a plurality of preset hierarchy intervals, where the maximum luminance modification value is used to modify a largest value in maximum RGB component values of the plurality of pixels included in the HDR image; and adjusting a dynamic range of the HDR image based on the maximum luminance modification value.
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公开(公告)号：US20220122236A1
公开(公告)日：2022-04-21
申请号：US17564653
申请日：2021-12-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Quanhe YU
IPC: G06T5/00
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.
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公开(公告)号：US20170195692A1
公开(公告)日：2017-07-06
申请号：US15466666
申请日：2017-03-22
Applicant: Tsinghua University , Huawei Technologies Co., Ltd.
Inventor： Quanhe YU , Xiaozhen ZHENG , Jianhua ZHENG , Yun HE
IPC: H04N19/91 , H04N19/50 , H04N19/103 , H04N19/61
CPC classification number: H04N19/91 , H03M7/3075 , H03M7/4012 , H04N19/103 , H04N19/50 , H04N19/61
Abstract: The present application discloses video data encoding and decoding methods and apparatuses, so as to conveniently perform data encoding and decoding on video data. The method includes: arithmetic encoding, where the arithmetic encoding includes: obtaining a binary symbol of image data; and if the binary symbol is a most probable symbol MPS, updating a first encoding interval corresponding to the MPS in a logarithm domain, and if the first updated encoding interval is less than a preset range of an arithmetic encoding interval, performing normalization processing on the first encoding interval in the logarithm domain; or if the binary symbol is a least probable symbol LPS, updating a second encoding interval corresponding to the LPS in an original number domain, and performing normalization processing on the second encoding interval in the original number domain.
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Patent Agency Ranking
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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公开(公告)号：US20230140259A1
公开(公告)日：2023-05-04
申请号：US18053156
申请日：2022-11-07
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yichuan WANG , Quanhe YU , Hu CHEN , Weiwei XU , Elena Alexandrovna ALSHINA
Abstract: This application provides an image dynamic range processing method and apparatus. The method includes: obtaining a first coordinate value of a first interpolation point and a first coordinate value of a third interpolation point related to a first cubic spline curve; and determining, based on histogram information of a first luminance interval of a to-be-processed image, a first coordinate value of a second interpolation point related to the first cubic spline curve. The first luminance interval is an interval between the first coordinate value of the first interpolation point and the first coordinate value of the third interpolation point. The first coordinate value of the first interpolation point, the first coordinate value of the second interpolation point, and the first coordinate value of the third interpolation point are used to determine a function of the first cubic spline curve.
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公开(公告)号：US20230042923A1
公开(公告)日：2023-02-09
申请号：US17976426
申请日：2022-10-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Weiwei XU , Quanhe YU , Hu CHEN , Yichuan WANG
Abstract: A mapping curve parameter obtaining method and apparatus are described. The method includes obtaining a first mapping curve parameter set and first maximum target system display luminance, and obtaining a display luminance parameter set, where the display luminance parameter set includes maximum display luminance and/or minimum display luminance of a display device. The method also includes obtaining an adjustment coefficient set, where the adjustment coefficient set includes one or more adjustment coefficients, and the one or more adjustment coefficients correspond to one or more parameters in the first mapping curve parameter set. Furthermore, the method includes adjusting the one or more parameters in the first mapping curve parameter set based on the display luminance parameter set, the first maximum target system display luminance, and the adjustment coefficient set to obtain a second mapping curve parameter set, where the second mapping curve parameter set includes one or more adjusted parameters.
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公开(公告)号：US20220256157A1
公开(公告)日：2022-08-11
申请号：US17721561
申请日：2022-04-15
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Weiwei XU , Quanhe YU , Hu CHEN , Elena Alexandrovna ALSHINA , Rafal MANTIUK
IPC: H04N19/126 , H04N19/186 , H04N19/136 , H04N19/172 , H04N19/189
Abstract: Embodiments of this application provide a method for processing image signal conversion, including: obtaining a primary color component of a to-be-processed pixel; and converting a first value of the primary color component into a second value based on a preset dynamic range conversion model, where the dynamic range conversion model is: L ′ = F ( L ) = a × ( p × L n ( k 1 × p - k 2 ) × L n + k 3 ) m + b , where L is the first value, L′ is the second value, and k1, k2, k3, a, b, m, n, and p are model parameters.
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