Auto exposure method and device, and imaging device

An automatic exposure and exposure value technology, which is applied in the field of image processing, can solve the problems of large amount of equipment calculation, equipment performance degradation, long automatic exposure time, etc., to achieve the effect of improving equipment performance, reducing the number of searches, and reducing the automatic exposure time

Active Publication Date: 2012-03-07
HUAWEI DEVICE CO LTD
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  • Abstract
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Problems solved by technology

[0005] In view of this, the present invention provides an automatic exposure method to solve the problem that the automatic exposure time is long and the calculation amount of the equipment is large, which leads to the degradation of equipment performance

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  • Auto exposure method and device, and imaging device
  • Auto exposure method and device, and imaging device
  • Auto exposure method and device, and imaging device

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] One of the main ideas of the present invention may include: acquiring the current ambient brightness value, and determining the current exposure value search range corresponding to the current ambient brightness value according to the preset correspondence between the ambient brightness range and the exposure value range, where the exposure value Search and search in the search range to determine the optimal exposure value, and perform automatic exposure...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235H04N5/243
CPCG03B7/08H04N23/71
Inventor 李娟范勇王爱翠方超
Owner HUAWEI DEVICE CO LTD
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