Automatic exposure adjusting method and system

Abstract

The invention provides an automatic exposure adjusting method and system. The method at least comprises the steps of obtaining a current image, and carrying out statistics on the pixels contained in a bright area of the image and the pixels contained in a dark area of the image and the brightness of the pixels; calculating the pixel proportion of the bright area and the pixel proportion of the dark area according to a statistical result; adjusting the exposure parameters of imaging equipment according to the brightness value of the current statistical pixels and a preset brightness threshold value if at least one of the pixel proportion of the bright area and the pixel proportion of the dark area is larger than or equal to a preset proportion; continuously carrying out statistic if the pixel proportion of the bright area and the pixel proportion of the dark area are both smaller than the preset proportion until the brightness values of the pixels reach the preset brightness threshold value. According to the automatic exposure adjusting method and system, operation complexity and operation amount are both low in the exposure state judging process, the exposure state of the image can be judged fast, and the instantaneity of exposure control over the image can be improved at the same time.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an automatic exposure adjustment method and system. Background technique [0002] With the development of digital technology, digital cameras and digital video cameras have been used in many different environments. Wherein, a main function of digital camera and digital video camera is exactly automatic exposure. Automatic exposure is the default setting of a digital camera or digital video camera. In this exposure mode, the camera will automatically control the exposure of the image. The user does not need to do anything. The sensor on the camera or video camera can automatically set it according to the intensity of light reflected from the scene Exposure parameters, such as exposure time setting, gain, aperture value, etc. [0003] However, if the image transmitted from the imaging device is under-exposed or over-exposed, it will have a great impact on the sub...

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Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an automatic exposure adjustment method and system, which is used to solve the problems of the complex image exposure state judgment method, the lag in the judgment of the image exposure state, and the real-time performance in the prior art. bad question

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