Method for measuring ambient brightness value and photographing device
AssigneeSengled Co., Ltd.
InventorsShengli Xie, Jinxiang Shen
Life of this patent
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Abstract
The present disclosure provides a method for measuring an ambient brightness value, including: obtaining an exposure value of a photographing device during an automatic exposure process and an image brightness value corresponding to the exposure value; and determining an ambient brightness value based on the exposure value, the image brightness value, and an automatic exposure enhancement coefficient of the photographing device.
Claims10
A method for measuring an ambient brightness value implemented in a photographing device including a processor, the method comprising:
- obtaining, through the processor, an automatic exposure enhancement coefficient of the photographing device, wherein the automatic exposure enhancement coefficient is calculated based on a plurality sets of automatic exposures and laboratory image brightness values, and a laboratory brightness value;
- each of the laboratory image brightness values corresponds to one of the automatic exposures;
- and the plurality sets of automatic exposures and laboratory image brightness values, and the laboratory brightness value are obtained under a laboratory environment without other light interference;
- obtaining, through the processor, an exposure value of the photographing device during an automatic exposure process and an image brightness value corresponding to the exposure value;
- and
- determining, through the processor, the ambient brightness value based on the exposure value, the image brightness value, and the calculated automatic exposure enhancement coefficient of the photographing device, so as to simplify an optical design of the photographing device without a use of a photosensitive device.
A photographing device comprising a processor, the processor being configured to:
- obtain an automatic exposure enhancement coefficient of the photographing device, wherein the automatic exposure enhancement coefficient is calculated based on a plurality sets of automatic exposures and laboratory image brightness values, and a laboratory brightness value;
- each of the laboratory image brightness values corresponds to one of the automatic exposures;
- and the plurality sets of automatic exposures and laboratory image brightness values, and the laboratory brightness value are obtained under a laboratory environment without other light interference;
- obtain an exposure value of the photographing device during an automatic exposure process and an image brightness value corresponding to the exposure value;
- and
- determine an ambient brightness value based on the exposure value, the image brightness value, and the calculated automatic exposure enhancement coefficient of the photographing device, so as to simplify an optical design of the photographing device without a use of a photosensitive device.
Dependencies are inferred from the claim text.