Automatic exposure compensation method, storage medium and computer

Abstract

The invention relates to an automatic exposure compensation method, a storage medium and a computer, and the method comprises the following steps: segmenting a whole picture into small blocks, designing an initial weight for each small block, and calculating a weighted average brightness value of the whole picture according to the brightness and the initial weight of each small block; Detecting whether the brightness values of n * n adjacent small blocks of images are all smaller than a set first brightness threshold value or not, if yes, carrying out the step, and improving a target exposurevalue; and until the difference value between the target exposure value and the weighted average brightness value is smaller than a second threshold value. Complex operations such as intelligent recognition and main body detection are not needed in a picture obtained in any shooting environment, the complex condition in the picture is directly converted into a processing idea of convolution-like,and finally the exposure compensation effect of the backlight picture is achieved.

Description

technical field [0001] The invention relates to the field of automatic image processing, in particular to a photo automatic backlight compensation algorithm and storage medium for software calculation and processing. Background technique [0002] When the camera is facing a scene with a window or strong light, the person or object next to the window will be dark, or even unrecognizable. The backlight compensation control technology is used to improve the brightness of the subject under the backlight condition. Traditional backlight Compensation is all about artificially setting the center position of the picture. If the main object is not in the center of the picture, then the traditional backlight compensation cannot achieve the desired effect. In order to realize automatic backlight compensation, some devices need to add machine vision technology such as face detection, which increases the cost and power consumption of the device, and in the backlight scene, the subject is...

AI Technical Summary

Problems solved by technology

[0003] Therefore, it is necessary to provide a screen backlight compensation method that simply handles the backlight environment and the main image may not be in the middle of the screen, so as to solve the screen processing problem of portrait photography;

Images