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Automatic exposure method, device, camera device and mobile terminal

A technology of automatic exposure and exposure value, applied in the field of photography

Active Publication Date: 2013-11-13
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the stability of automatic exposure adjustment during preview, the existing methods rarely mention

Method used

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  • Automatic exposure method, device, camera device and mobile terminal
  • Automatic exposure method, device, camera device and mobile terminal
  • Automatic exposure method, device, camera device and mobile terminal

Examples

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Embodiment Construction

[0038] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0039] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0040] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0041] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authoriz...

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Abstract

The invention discloses a camera automatic exposure method, a device, a camera device and a mobile terminal, and relates to the digital photographing technology. The method comprises the steps of determining the current exposure value of a camera on the basis of a camera response curve according to the brightness value of a photograph, wherein the camera response curve is a corresponding relation between the exposure value of the camera and the photograph brightness; determining the exposure compensation amount according to the current exposure value and the optimal exposure value of the camera, and determining the optimal exposure value according to the camera response curve; adjusting the camera so as to adjust the brightness of a photograph pixel according to the exposure compensation amount. On the basis of the inherent response curve of the camera, the current exposure value corresponding to the photograph brightness is obtained, the exposure compensation amount of the current exposure value and the exposure compensation amount of the optimal exposure value are obtained, the brightness of the photograph pixel is adjusted according to the exposure compensation amount, the automatic exposure adjustment is carried out on the basis of the camera inherent response curve and is not carried out on the basis of the brightness value of the taken photograph in the prior art, and the camera automatic exposure method has the advantages of being more accurate, more stable and higher in adaptability.

Description

technical field [0001] The invention relates to photography technology, in particular to an automatic exposure method, device, photographic equipment and mobile terminal. Background technique [0002] The automatic exposure (Auto-Exposure, AE) function of a digital camera is already an essential function of an image signal processing (Image Signal Processing) system. . When the detected scene (object area of ​​interest, etc.) is relatively bright, AE will automatically reduce the camera exposure value; on the contrary, when the measured scene (object interest area, etc.) is relatively dark, AE will automatically increase the camera exposure value. Generally, the exposure value of a camera is determined by the aperture size and exposure time of the camera. The larger the aperture, the longer the exposure time, the larger the exposure value, the greater the amount of light entering the camera, and the brighter the subject being photographed. Of course, the brightness value ...

Claims

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Application Information

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IPC IPC(8): H04N5/243G03B7/00G03B30/00
Inventor 黄玉春常广鸣林福辉彭晓峰
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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