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Automatic exposure method and device

An automatic exposure and exposure point technology, which is applied to control exposure, optics, instruments, etc., can solve problems such as overexposure of highlighted areas and affect image display effects, and achieve the effects of reducing exposure, increasing exposure, and improving display effects

Active Publication Date: 2011-11-30
VIMICRO ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for scenes with a relatively high dynamic range, it is easy to overexpose the local highlight area, which affects the display effect of the image.

Method used

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  • Automatic exposure method and device
  • Automatic exposure method and device

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Embodiment Construction

[0031] In the embodiment of the present invention, when the brightness value of the image belongs to the brightness range, it is further judged whether there is an over-exposed area in the image, and when there is an over-exposed area, the automatic exposure parameter value is adjusted to reduce the exposure of the image, thereby reducing the over-exposure of the image. Exposure improves image display. And when there is no overexposure area, adjust the automatic exposure parameter value to increase the exposure of the image and improve the display effect of the image.

[0032] The images in this embodiment include pictures and video images.

[0033] see figure 1 In this embodiment, the main method flow for performing automatic exposure on images is as follows:

[0034] Step 101: Obtain the brightness value of the image. The brightness value of the image is the average brightness value of the entire image, or the weighted average brightness value of the entire image, or othe...

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Abstract

The invention discloses an automatic exposure method, which is used for realizing the automatic exposure of an image so as to improve the display effect of the image. The method includes: judging whether the brightness value of the image belongs to a preset brightness interval; when the brightness value of the image belongs to the brightness interval, judging whether there is an overexposed area in the image; when there is an overexposed area, adjusting the automatic exposure parameter value, to reduce the exposure of the image. The invention also discloses a device for realizing the method.

Description

technical field [0001] The invention relates to the fields of computer and image processing, in particular to a method and device for automatically exposing images. Background technique [0002] With the development of digital technology, digital cameras and digital video cameras have entered thousands of households. Wherein, a main function of digital camera and digital video camera is exactly automatic exposure. [0003] Automatic exposure is the default setting of many digital cameras. In this exposure mode, the camera will automatically control the exposure of the shot. The user does not need to do anything at all. The sensor on the camera can automatically set the aperture value and shutter speed according to the intensity of light reflected from the scene. . Exposure control is mainly used to adjust the overall brightness of the scene. If the subject is too dark, you can adjust the exposure compensation scale to increase the brightness. [0004] In the prior art, mo...

Claims

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Application Information

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IPC IPC(8): G03B7/08
Inventor 李昕彤
Owner VIMICRO ELECTRONICS CORP
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