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Method and system for automatically adjusting exposure effect of camera

An automatic adjustment and camera technology, applied to TV system components, color TV components, TVs, etc., can solve problems such as underexposure in dark places, overexposure in bright places, loss of image detail quality, etc., to prevent underexposure Effects of exposure, image quality enhancement, and exposure enhancement

Active Publication Date: 2014-07-30
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current automatic exposure is to make one exposure for the whole frame image. For some scenes with uniform brightness, the image exposure effect of this processing method is quite satisfactory, but in some scenes with obvious contrast between light and dark, the overall The processing method of automatic exposure of the frame image will cause underexposure in dark places and overexposure in bright places, and the quality of the details of the image will be seriously lost.

Method used

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  • Method and system for automatically adjusting exposure effect of camera
  • Method and system for automatically adjusting exposure effect of camera
  • Method and system for automatically adjusting exposure effect of camera

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Embodiment 1

[0027] as attached figure 1 As shown, a method for automatically adjusting camera exposure effect, the method steps include:

[0028] S1. After starting the camera, create a statistics thread;

[0029] S2. Start the preview, and divide the entire frame of image data into multiple sub-block regions;

[0030] S3. Counting brightness information of each sub-block area;

[0031] S4. According to the luminance information of each sub-block area, determine the luminance area and the dark luminance area; in this embodiment, by finding out in each sub-block area the pixel row at the boundary between light and dark with obvious difference in image data luminance contrast, so as to determine the The upper and lower parts of the pixel row at the junction of light and dark are the brightness region or the dark brightness region;

[0032] S5. According to the exposure algorithm, corresponding exposure parameters are adopted for the brightness region and the dark brightness region, so as...

Embodiment 2

[0036] as attached figure 2 As shown, this embodiment provides a system for automatically adjusting the camera exposure effect, and the system includes:

[0037] The sub-block area division module is used to divide the entire frame of image data into multiple sub-block areas after the camera starts previewing;

[0038] The statistical thread module is used to count the brightness information of each sub-module area;

[0039] A light and dark brightness region determination module, configured to determine the brightness region and the dark brightness region in the entire frame data image according to the brightness information counted by the statistical thread module;

[0040] The exposure parameter determination module is used to determine the corresponding exposure parameters of the brightness region and the dark brightness region, so as to prevent overexposure of the brightness region or underexposure of the dark brightness region;

[0041] The regional exposure module is...

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Abstract

A method for automatically adjusting the exposure effect of a camera comprises the following steps that S1, a statistical thread is created; S2, preview is started, whole-image data are divided into a plurality of sub-regions; S3, brightness information of each sub-region is collected; S4, according to the brightness information of each sub-region, high-brightness regions and low-brightness regions are determined; S5, according to the exposure algorithm, corresponding exposure parameters are adopted for the high-brightness regions and the low-brightness regions; S6, after exposure adjustment is carried out on the regions having different types of brightness in the whole-image data, the step S4 is repeated if the camera is not switched off, and related statistical thread resources are released if the camera is switched off. By means of the method and system for automatically adjusting the exposure effect of the camera, when photographing is carried out on an occasion where the brightness contrast is high, exposure control over the high-brightness regions in an image can be carried out so that overexposure can be prevented, exposure control over the low-brightness regions can be carried out so that underexposure can be prevented, the exposure effect can be improved effectively, detail portions of the image are kept as many as possible, and imaging quality is promoted.

Description

technical field [0001] The invention relates to a method and system for automatically adjusting the exposure effect of a camera. Background technique [0002] Camera exposure refers to the process in which the photosensitive element of the camera records the brightness information of the image according to the current ambient brightness when the camera is previewing or taking a picture. There are two types of exposure, automatic exposure and manual exposure compensation. Smartphone cameras generally use automatic exposure by default, plus manual exposure compensation settings to adjust the exposure of the image. Exposure compensation can enhance or reduce the brightness of the image as a whole. [0003] The current automatic exposure is to make one exposure for the whole frame image. For some scenes with uniform brightness, the image exposure effect of this processing method is quite satisfactory, but in some scenes with obvious contrast between light and dark, the overall ...

Claims

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Application Information

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IPC IPC(8): H04N5/235
Inventor 刘彬蓝和
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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