Auto exposure method and device, and imaging device

Abstract

The present invention provides an automatic exposure method, device, and imaging apparatus. The method comprises: acquiring a brightness value for a current surrounding; on the basis of a correlation between a preset range of surrounding brightness and a search range for exposure value, determining a current exposure value search range matching the current surrounding brightness value; determining an optimum exposure value within the current exposure value search range for the, and performing an automatic exposure on the basis of the optimum exposure value. Under the present invention, a need to determine the exposure value among the entire exposure value search range is obviated, the range to search for the exposure value is narrowed, thus the number of searches is reduced, the time required for automatic exposure is also reduced, the device is alleviated of computation workload, and device performance is improved.

Description

technical field

[0001] The present invention relates to the technical field of image processing, in particular to an automatic exposure method, device and imaging equipment. Background technique

[0002] Automatic exposure refers to automatically setting the shutter value and aperture value according to the acquired exposure value, including brightness gain value and exposure light value, so as to adjust the sensor gain and exposure time of the camera to achieve the exposure required for shooting.

[0003] Existing imaging equipment, especially mobile phones with camera functions, when starting the camera, due to the unstable process of the imaging interface, effective photography cannot be realized, so automatic exposure is required to make the brightness value of the captured image reach the target brightness value to make the imaging interface stable.

[0004] In imaging equipment, different exposure values ​​are usually preset, and each exposure value includes brightnes...

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