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公开(公告)号：EP3866464A1
公开(公告)日：2021-08-18
申请号：EP19875782.5
申请日：2019-10-28
发明人： XU, Weiwei , YANG, Haitao , ZHAO, Yin
IPC分类号： H04N19/105
摘要： Embodiments of the present invention provide a picture prediction method. The method includes: receiving a bitstream; parsing the bitstream to obtain a prediction mode of a current block; when the prediction mode of the current block is a combined intra and inter prediction mode, selecting an execution mode of a triangular prediction unit mode according to a preset policy; determining motion information of the current block according to the execution mode of the triangular prediction unit mode; performing a motion compensation process based on the motion information, to obtain an inter prediction sample; obtaining an intra prediction sample according to the prediction mode of the current block; and combining the inter prediction sample and the intra prediction sample to obtain a prediction picture of the current block. The embodiments of the present invention can improve encoding and decoding efficiency.
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公开(公告)号：EP4443381A1
公开(公告)日：2024-10-09
申请号：EP22926819.8
申请日：2022-11-18
发明人： WANG, Yichuan , YU, Quanhe , XU, Weiwei , CHEN, Hu , YOU, Hongjie
CPC分类号： H04N19/30
摘要： This application discloses an image processing method and apparatus, and a storage medium, and relates to the field of video image processing, to support different image layering methods, provide a flexible image fusion manner, and help improve image processing effect. 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 the first layered image is a base layer image, and the second layered image is a detail layer image; or the first layered image is a detail layer image, and the second layered image is a base 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.
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公开(公告)号：EP4391546A1
公开(公告)日：2024-06-26
申请号：EP22869122.6
申请日：2022-09-08
发明人： XU, Weiwei , ZHOU, Jiantong , YU, Quanhe , WEN, Jinsong , HU, Yutong
CPC分类号： H04N19/186 , H04N19/30 , H04N19/42 , H04N19/44 , H04N19/98
摘要： Embodiments of this application provide a video encoding method, a video decoding method, and an apparatus, and relate to the field of image processing technologies. 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 first bit width, and the first bit width is 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. In this application, good processing on an SDR video decoding device and an HDR video decoding device can be ensured based on the preset data and the SDR bitstream.
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公开(公告)号：EP4135305A1
公开(公告)日：2023-02-15
申请号：EP21796304.0
申请日：2021-04-21
发明人： XU, Weiwei , YU, Quanhe , CHEN, Hu , WANG, Yichuan
IPC分类号： H04N5/14
摘要： A mapping curve parameter obtaining method and apparatus are provided. The method includes: obtaining a first mapping curve parameter set and first maximum target system display luminance (1001); obtaining a display luminance parameter set (1002), where the display luminance parameter set includes maximum display luminance and/or minimum display luminance of a display device; obtaining an adjustment coefficient set (1003), 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; and 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 (1004), where the second mapping curve parameter set includes one or more adjusted parameters. According to the method, more accurate tone adjustment can be performed on display devices with different luminance. This greatly improves flexibility.
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公开(公告)号：EP4037312A1
公开(公告)日：2022-08-03
申请号：EP20876760.8
申请日：2020-09-09
发明人： XU, Weiwei , YU, Quanhe , CHEN, Hu , ALSHINA, Elena , MANTIUK, Rafal
IPC分类号： H04N9/67
摘要： 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 k 1 , k 2 , k 3 , a, b, m, n, and p are model parameters.-
公开(公告)号：EP4037311A1
公开(公告)日：2022-08-03
申请号：EP20877966.0
申请日：2020-09-14
发明人： XU, Weiwei , YU, Quanhe , CHEN, Hu , XU, Xiaodong
摘要： 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：EP4032257A1
公开(公告)日：2022-07-27
申请号：EP20934599.0
申请日：2020-05-08
发明人： CHEN, Hu , WANG, Yichuan , XU, Weiwei , YU, Quanhe , ALSHINA, Elena Alexandrovna
IPC分类号： H04N5/355
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公开(公告)号：EP4429245A1
公开(公告)日：2024-09-11
申请号：EP23742806.5
申请日：2023-01-13
发明人： WEN, Jinsong , ZHONG, Shuncai , XU, Weiwei , ZHAI, Qiyan , GONG, Wenhong
CPC分类号： H04N1/60 , H04N19/186 , H04N19/85 , H04N19/46
摘要： An image capture method, an image display method, and an apparatus are provided to reduce a difference between an image displayed on a display end and an image displayed on a capture end. During encoding, the capture end transmits data for describing a luminance mapping relationship between a before-compression image and an after-compression image to the display end, so that consistency between the image on the capture end and the image on the display end is ensured as much as possible. In addition, screen related information for describing luminance of the capture end is transmitted to the display end, so that the display end adjusts backlight and a pixel value based on the screen related information, to improve consistency between the image on the capture end and the image on the display end.
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公开(公告)号：EP4411645A1
公开(公告)日：2024-08-07
申请号：EP22897851.6
申请日：2022-11-23
发明人： HU, Xiangyu , XU, Weiwei , WEN, Jinsong , JIA, Yanbing , ZHOU, Jiantong , ZHAI, Qiyan , YU, Quanhe , ZENG, Yihua , WANG, Zizhong , WANG, Yichuan , CHEN, Hu , AI, Jinqin , HU, Yutong
IPC分类号： G06T9/00
摘要： This application provides a picture processing method and an apparatus. At an encoder side, 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. In this application, a picture presented by a zoomed-in region can be used to simulate visual sensory experience for a real scene that is of a to-be-zoomed-in region and that is perceived by human eyes. This resolves a problem that a zoomed-in picture is unclear and blurred, and can improve visual zoom-in experience of a user.
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公开(公告)号：EP4390843A1
公开(公告)日：2024-06-26
申请号：EP22868808.1
申请日：2022-07-07
发明人： XU, Weiwei , WEN, Jinsong , WU, Lei , MA, Zhongke , JIA, Yanbing , YU, Quanhe , WANG, Zizhong , WANG, Yichuan , CHEN, Hu
IPC分类号： G06T7/11
CPC分类号： G06T5/92
摘要： This application provides a tone mapping method and system, and a device, to provide a technical solution that can improve tone mapping effect. The method includes: obtaining a to-be-displayed image frame and metadata, where the metadata 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, based on the correspondence, a related metadata information unit corresponding to each related segmentation region; obtaining, based on the related metadata information unit, 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 corresponding to the related segmentation region and the weighting factor; and performing tone mapping based on the tone mapping value.
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