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(11)

EP 4 232 912 A1

(12)

(43) Date of publication: 30.08.2023 Bulletin 2023/35 (21) Application number: 21890604.8 (22) Date of filing: 02.06.2021

(51) International Patent Classification (IPC):  G06F 16/16(2019.01) (52) Cooperative Patent Classification (CPC): G06Q 10/10; G06Q 50/26; G06Q 50/18; G06Q 2220/00; G06F 16/16; G06F 16/2291; G06F 21/6218; H04N 21/2743; H04N 21/23109 (86) International application number: PCT/CN2021/097912 (87) International publication number: WO 2022/100073 (19.05.2022 Gazette 2022/20)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 10.11.2020 CN 202011244308 (71) Applicant: Zhejiang Dahua Technology Co., Ltd. Hangzhou, Zhejiang 310053 (CN)	(72) Inventor: ZHANG, Yunlong Hangzhou, Zhejiang 310053 (CN) (74) Representative: Wang, Bo et al Panovision IP Ebersberger Straße 3 85570 Markt Schwaben 85570 Markt Schwaben (DE)