Patents by Inventor Quanhe YU

Quanhe YU has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11936861
    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.
    Type: Grant
    Filed: November 16, 2020
    Date of Patent: March 19, 2024
    Assignees: Huawei Technologies Co., Ltd., Tsinghua University
    Inventors: Quanhe Yu, Jicheng An, Jianhua Zheng, Yongbing Lin, Liqiang Wang, Benben Niu, Ziwei Wei, Yun He
  • Publication number: 20240054623
    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.
    Type: Application
    Filed: October 25, 2023
    Publication date: February 15, 2024
    Inventors: Hu CHEN, Quanhe YU, Weiwei XU, Jiantong ZHOU, Ruihua LI
  • Patent number: 11875487
    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.
    Type: Grant
    Filed: April 14, 2022
    Date of Patent: January 16, 2024
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Quanhe Yu, Haitao Yang, Jiantong Zhou
  • Publication number: 20230325987
    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.
    Type: Application
    Filed: June 16, 2023
    Publication date: October 12, 2023
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Yichuan Wang, Quanhe Yu, Weiwei Xu, Hu Chen
  • Publication number: 20230140259
    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.
    Type: Application
    Filed: November 7, 2022
    Publication date: May 4, 2023
    Inventors: Yichuan WANG, Quanhe YU, Hu CHEN, Weiwei XU, Elena Alexandrovna ALSHINA
  • Publication number: 20230054046
    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.
    Type: Application
    Filed: October 28, 2022
    Publication date: February 23, 2023
    Inventors: Weiwei XU, Quanhe YU, Hu CHEN, Yichuan WANG
  • Publication number: 20230057829
    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.
    Type: Application
    Filed: November 7, 2022
    Publication date: February 23, 2023
    Inventors: Hu Chen, Yichuan Wang, Weiwei Xu, Quanhe Yu, Elena Alexandrovna Alshina
  • Publication number: 20230054477
    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.
    Type: Application
    Filed: November 7, 2022
    Publication date: February 23, 2023
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Hu Chen, Yichuan Wang, Weiwei Xu, Quanhe Yu, Elena Alexandrovna Alshina
  • Publication number: 20230049334
    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.
    Type: Application
    Filed: October 21, 2022
    Publication date: February 16, 2023
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Hu Chen, Elena Alexandrovna Alshina, Weiwei Xu, Quanhe Yu, Yichuan Wang
  • Publication number: 20230042923
    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.
    Type: Application
    Filed: October 28, 2022
    Publication date: February 9, 2023
    Inventors: Weiwei XU, Quanhe YU, Hu CHEN, Yichuan WANG
  • Publication number: 20230010907
    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.
    Type: Application
    Filed: July 25, 2022
    Publication date: January 12, 2023
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Na ZHANG, Jicheng AN, Quanhe YU, Jianhua ZHENG
  • Patent number: 11483561
    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.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: October 25, 2022
    Assignees: Huawei Technologies Co., Ltd., TSINGHUA UNIVERSITY
    Inventors: Liqiang Wang, Jianhua Zheng, Quanhe Yu, Yongbing Lin, Yun He
  • Publication number: 20220256157
    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.
    Type: Application
    Filed: April 15, 2022
    Publication date: August 11, 2022
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Weiwei XU, Quanhe YU, Hu CHEN, Elena Alexandrovna ALSHINA, Rafal MANTIUK
  • Patent number: 11412210
    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.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: August 9, 2022
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Na Zhang, Jicheng An, Quanhe Yu, Jianhua Zheng
  • Publication number: 20220245774
    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.
    Type: Application
    Filed: April 14, 2022
    Publication date: August 4, 2022
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Quanhe YU, Haitao YANG, Jiantong ZHOU
  • Publication number: 20220239880
    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.
    Type: Application
    Filed: April 14, 2022
    Publication date: July 28, 2022
    Inventors: Weiwei XU, Quanhe YU, Hu CHEN, Xiaodong XU
  • Publication number: 20220237754
    Abstract: This application provides an image processing method, including: adaptively determining at least one interpolation point based on feature information or dynamic metadata of a to-be-processed image, and determining the at least one interpolation point and a modified spline curve that passes through the at least one interpolation point, where the modified spline curve includes at least one of a linear spline curve or a cubic spline curve; and performing tone mapping on the to-be-processed image based on a modified tone mapping curve, where the modified tone mapping curve includes at least a part of an initial tone mapping curve and the modified spline curve. According to the method provided in this application, the tone mapping curve can be adaptively modified based on a scene requirement, so that images in various scenes can have a good display effect.
    Type: Application
    Filed: April 15, 2022
    Publication date: July 28, 2022
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Quanhe YU, Weiwei XU, Hu CHEN, Dongsheng WU, Le YUAN
  • Patent number: 11323749
    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.
    Type: Grant
    Filed: October 2, 2020
    Date of Patent: May 3, 2022
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jianhua Zheng, Quanhe Yu, Meng Li, Hai Chen, Chen-Xiong Zhang
  • Publication number: 20220122236
    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.
    Type: Application
    Filed: December 29, 2021
    Publication date: April 21, 2022
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Quanhe YU
  • Publication number: 20210235084
    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.
    Type: Application
    Filed: April 15, 2021
    Publication date: July 29, 2021
    Inventors: Quanhe YU, Jianhua ZHENG, Liqiang WANG, Yun HE