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Title:
METHOD AND DEVICE FOR OBTAINING EXPOSURE COMPENSATION VALUE OF HIGH-DYNAMIC-RANGE IMAGE
Document Type and Number:
WIPO Patent Application WO/2019/085705
Kind Code:
A1
Abstract:
Disclosed in the invention are a method and device for obtaining the exposure compensation value of a high-dynamic-range image, wherein the method comprises the steps of: determining various-color channel histograms corresponding to a current scene, wherein the various-color channel histograms include the corresponding relationship of different brightness and pixel scales under various-color channels; according to a pre-set normal exposure brightness threshold value and pixel scale threshold value and the corresponding relationship of different brightness and pixel scales under various-color channels, determining an underexposure degree and an overexpose degree of the current scene; and, according to the underexposure degree and overexpose degree of the current scene, determining the underexposure compensation value and the overexpose compensation value of the current scene. By means of the method of the invention, the exposure compensation amount of a shot image can be adaptively determined according to different shooting scenes, so that optimal dynamic exposure compensation on the shot image can be realized; therefore, the quality of the shot image is good; and the user experience is improved.

Inventors:
LIU, Kai (No.18, Haibin Road Wusha, Chang'a, Dongguan Guangdong 0, 523860, CN)
Application Number:
CN2018/108639
Publication Date:
May 09, 2019
Filing Date:
September 29, 2018
Export Citation:
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Assignee:
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD. (No.18, Haibin Road Wusha, Chang'a, Dongguan Guangdong 0, 523860, CN)
International Classes:
H04N5/235
Foreign References:
CN107635102A2018-01-26
CN107888840A2018-04-06
CN104580925A2015-04-29
CN104301624A2015-01-21
CN102075688A2011-05-25
CN106572311A2017-04-19
US20170064179A12017-03-02
US20140168486A12014-06-19
KR20090111065A2009-10-26
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (Room 301 Trade Building, Zhaolanyuan Tsinghua University, Qinghuayuan, Haidian District, Beijing 4, 100084, CN)
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