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公开(公告)号：EP3834409A1
公开(公告)日：2021-06-16
申请号：EP18796145.3
申请日：2018-09-10
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公开(公告)号：EP4428805A1
公开(公告)日：2024-09-11
申请号：EP22906194.0
申请日：2022-11-22
发明人： XU, Weiwei , YANG, Haitao , YU, Quanhe , CHEN, Hu , WANG, Yichuan
IPC分类号： G06T3/00
CPC分类号： G06V10/762 , G06T5/90 , G06T2207/1001620130101
摘要： 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 based on the dynamic mapping information of each pixel in the current angle of view range, to obtain a two-dimensional panoramic projection image in the current angle of view range, where the two-dimensional panoramic projection image is used for display or subsequent processing. According to the method, dynamic range mapping of a panoramic video can be effectively implemented, to improve display effect of the panoramic video.
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公开(公告)号：EP4239565A1
公开(公告)日：2023-09-06
申请号：EP21905265.1
申请日：2021-10-18
发明人： WANG, Yichuan , YU, Quanhe , XU, Weiwei , CHEN, Hu
IPC分类号： G06T5/00
摘要： This application provides a tone mapping method and apparatus. The method may be performed by a backend device. In the method, the backend device may receive metadata and an HDR image from a frontend device, generate a mapping curve based on feature parameters of the mapping curve included in the metadata, and perform tone mapping on the HDR image 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.
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4.发明公开
公开(公告)号：EP4131938A1
公开(公告)日：2023-02-08
申请号：EP21800024.8
申请日：2021-03-26
发明人： CHEN, Hu , ALSHINA, Elena Alexandrovna , XU, Weiwei , YU, Quanhe , WANG, Yichuan
IPC分类号： H04N5/355
摘要： This application provides a high dynamic range HDR video processing method, an encoding device, and a decoding device. In the method, a mode used by an HDR video may be determined on an encoder side according to a quality assessment algorithm. The method includes: obtaining dynamic metadata of an N th HDR video frame according to a dynamic metadata generation algorithm; calculating a tone-mapping (tone-mapping) curve parameter of the N th HDR video frame based on the dynamic metadata of the N th 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 D T , to determine a mode used by the N th HDR video frame, where the mode is an automatic mode or a director mode, and D T is a threshold value; and determining metadata of the N th HDR video frame based on the determined mode used by the N th HDR video frame.
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公开(公告)号：EP4094443A1
公开(公告)日：2022-11-30
申请号：EP21719154.3
申请日：2021-04-20
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6.发明公开
公开(公告)号：EP4094442A1
公开(公告)日：2022-11-30
申请号：EP21718619.6
申请日：2021-04-20
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公开(公告)号：EP4036841A1
公开(公告)日：2022-08-03
申请号：EP20877785.4
申请日：2020-09-04
发明人： YU, Quanhe , XU, Weiwei , CHEN, Hu , WU, Dongsheng , YUAN, Le
IPC分类号： G06T5/00
摘要： 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 passess 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.
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公开(公告)号：EP3827582A1
公开(公告)日：2021-06-02
申请号：EP18930015.5
申请日：2018-08-14
发明人： ZHAO, Zhijie , FANG, Yuntan , ZHA, Jun , CHEN, Hu , ZHOU, Jiantong
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9.发明公开
公开(公告)号：EP3808086A1
公开(公告)日：2021-04-21
申请号：EP18785459.1
申请日：2018-08-14
发明人： CHEN, Hu , ZHAO, Zhijie , NOVIKOV, Dmitry Vadimovich , GILMUTDINOV, Marat Ravilevich , MALAKHOV, Kirill Aleksandrovich
IPC分类号： H04N19/196 , H04N19/51 , G06T9/00 , H04N19/61 , H04N19/96 , H04N19/17 , H04N19/167 , H04N19/85
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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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