DYNAMIC RANGE MAPPING METHOD AND APPARATUS FOR PANORAMIC VIDEO

WIPO Patent Application WO/2023/109442

A1

A dynamic range mapping method and apparatus for a panoramic video, relating to the field of video image processing. The method comprises: dividing a two-dimensional panoramic projection image corresponding to any frame of three-dimensional panoramic image in the panoramic video to obtain a plurality of areas of the two-dimensional panoramic projection image; acquiring metadata of the two-dimensional panoramic projection image, the metadata comprising metadata information units respectively corresponding to the plurality of areas, and the metadata information unit corresponding to one area comprising dynamic mapping information of the area; determining dynamic mapping information of each pixel within the current view angle range according to the respective dynamic mapping information of the plurality of areas; and performing dynamic range mapping on each pixel according to the dynamic mapping information of each pixel within the current view angle range to obtain a two-dimensional panoramic projection image within the current view angle range, the two-dimensional panoramic projection image being used for display or subsequent processing. The method can effectively implement dynamic range mapping for the panoramic video, thereby improving the display effect of the panoramic video.

XU WEIWEI (CN)
YANG HAITAO (CN)
YU QUANHE (CN)
CHEN HU (CN)
WANG YICHUAN (CN)

PCT/CN2022/133506

June 22, 2023

November 22, 2022

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HUAWEI TECH CO LTD (CN)

G06T3/00

CN107622474A	2018-01-23
CN106534827A	2017-03-22
CN107886468A	2018-04-06
CN112770178A	2021-05-07
US20200134792A1	2020-04-30

BEIJING ZBSD PATENT&TRADEMARK AGENT LTD. (CN)

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