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Automatic exposure method and apparatus, and computer device

A technology of automatic exposure and computer programs, applied in the field of image processing, can solve problems such as overexposure, darkening, and high brightness in the background, and achieve the effect of improving the portrait effect

Active Publication Date: 2017-09-15
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under uniform and bright light conditions, the existing AE algorithm has a better exposure effect on the face, but when taking pictures under backlight conditions, the portrait part of the photo exposed by the existing AE algorithm will encounter underexposure, which is obvious. The problem of being too dark; at the same time, the brightness of the background part is often too high, and there is a tendency to overexposure
Under the influence of underexposed portrait and overexposed background, it is difficult to achieve satisfactory visual effects in photos

Method used

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  • Automatic exposure method and apparatus, and computer device
  • Automatic exposure method and apparatus, and computer device
  • Automatic exposure method and apparatus, and computer device

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Embodiment Construction

[0028] Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.

[0029] figure 1 It is a flowchart of an embodiment of the automatic exposure method of the present application, such as figure 1 As shown, the above automatic exposure method may include:

[0030] Step 101, obtaining the depth of field of the scene to be photographed.

[0031] Wherein, the depth of field refers to the front and rear distance range of the subject measured by imaging that can obtain a clear image at the front of the camera or other imagers. After the focus is completed, a clear image can be formed in the ra...

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Abstract

The invention provides an automatic exposure method and apparatus, and a computer device. The automatic exposure method comprises the following steps: obtaining a depth of field of a to-be-shot scene; when the to-be-shot scene contains a portrait, separating the portrait part from a background part in the to-be-shot scene according to the depth of field; separately performing light measurement processing on the portrait part and the background part to obtain light measurement results of the portrait part and the background part; and controlling the exposure time lengths of the portrait part and the background part according to the light measurement results of the portrait part and the background part, and separately performing exposure compensation on the portrait part and the background part. By adoption of the automatic exposure method and apparatus, the brightness of the portrait part and / or the background part in the to-be-shot scene can be adjusted to improve the portrait effect in the to-be-shot scene in backlighting and other scenes.

Description

technical field [0001] The present application relates to the technical field of image processing, in particular to an automatic exposure method, device and computer equipment. Background technique [0002] In the existing related technologies, the automatic exposure (Automatic Exposure; hereinafter referred to as: AE) algorithm in the 3A algorithm realizes the change of brightness by driving the aperture, shutter and gain, and finally realizes that the brightness of the image reaches the maximum that the naked eye can recognize for different scenes. Good brightness. [0003] In the existing AE algorithm, the exposure evaluation value is calculated based on the whole image, the exposure evaluation value is compared with the ideal exposure value, and the exposure parameter adjustment method is determined according to the comparison result. Under uniform and bright light conditions, the existing AE algorithm has a better exposure effect on the face, but when taking pictures u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232H04N5/235
CPCH04N23/611H04N23/71H04N23/73
Inventor 曾元清
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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