A kind of automatic exposure compensation method, storage medium and computer

Abstract

An automatic exposure compensation method, a storage medium, and a computer, wherein the method includes the following steps: dividing the overall picture into small blocks, designing an initial weight for each small block, and then calculating the weight of the whole picture according to the brightness of each small block and the initial weight Weighted average luminance value; detect whether there are adjacent n*n small block screens whose luminance values ​​are all less than the set first luminance threshold, and if so, perform steps to increase the target exposure value; until the target exposure value is equal to the weighted average luminance The difference between the values ​​is less than a second threshold. The picture that can be obtained in any shooting environment does not need to do complex operations such as intelligent recognition and subject detection, and directly converts the complex situation in the picture into a convolution-like processing idea, and finally achieves the exposure compensation effect of the backlit picture.

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