Backlight compensation method and device

Abstract

The invention provides a backlight compensation method and device. The method comprises the following steps: an image of the current frame is acquired, and the image of the current frame is judged whether to be in the backlight state; if the image of the current frame is in the backlight state, then the average contrast of a first component corresponding to the image of the current frame is acquired, and the average contrast is judged whether to be greater than a first preset threshold value; if the average contrast is less than or equal to the first preset threshold value, then an adjustment coefficient of the first component is acquired according to the average contrast, and the average value of a second component corresponding to the image of the current frame is acquired; the average value is judged whether to be greater than a second preset threshold value; if the average value is less than or equal to the second preset threshold value, then an adjustment coefficient of the second component is acquired according to the average value; and the first component and the second component are adjusted according to the adjustment coefficient of the first component and the adjustment coefficient of the second component so as to perform backlight compensation on the image of the current frame. According to the method of the embodiments of the invention, the image or video shooting quality of a camera in the backlight state can be significantly improved, so the user experience can be improved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a backlight compensation method and device. Background technique [0002] When users use the camera to shoot or record video, they often encounter backlit scenes. In the backlit scene, the camera has the defect of insufficient brightness of the main body of the picture when imaging due to the target deviation of the exposure time control reference and the limited dynamic range of the photoelectric conversion device, resulting in a relatively dark picture. , seriously affecting the effect of taking pictures. [0003] In order to solve the above problems, pre-processing end compensation technology and post-processing end correction technology are mainly used at present. Among them, the pre-processing end compensation technology aims at the improvement or control of the imaging device by controlling the imaging process, such as the secondary exposure method, etc. The post-...

AI Technical Summary

Problems solved by technology

[0004] At present, the post-processing end compensation technology has the following problems: (1) The detected backlight area is not accurate, resulting in the problem of excessive or too small compensation during the compensation process; (2) In the case of brightness compensation, the smoothness of the image The loss of nature and naturalness cannot meet the requirements of human eye comfort; (3) The computational complexity cannot meet the processing needs of smart mobile terminals such as Android

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