An automatic exposure control system and method

Abstract

The invention provides an automatic exposure control system and method, and relates to the technical field of exposure control, comprising: an image acquisition module for continuously acquiring current environmental images; an image processing module, connected to the image acquisition module, for dividing the current environmental images into a The main body area and a background area, and the brightness difference between the main body area and the background area is calculated; the brightness calculation module is connected to the image processing module, and is used for calculating an exposure adjustment coefficient according to the brightness difference, and processing according to the exposure adjustment coefficient to obtain the target brightness value; the exposure control module is connected to the brightness calculation module, and is used to control the automatic exposure of the photographing device according to the target brightness value. The beneficial effect is that the target brightness value can be adaptively adjusted according to the scene, so that the subject area is more prominent, and the brightness of the photos taken is more reasonable, which effectively avoids the drawbacks of the conventional automatic exposure algorithm that the target brightness remains unchanged, and reduces the overexposure or underexposure of the picture. abnormal situation.

Description

technical field [0001] The invention relates to the technical field of exposure control, in particular to an automatic exposure control system and method. Background technique [0002] The purpose of automatic exposure is to achieve an appreciative brightness level or so-called target brightness level in different lighting conditions and scenes, so that the captured video or image is neither too dark nor too bright. To achieve this, adjust the lens aperture, sensor exposure time, sensor analog gain and sensor / ISP digital gain. This process is called automatic exposure. [0003] The traditional automatic exposure algorithm obtains a single and fixed target brightness value, which is weak in adaptability to different environmental scenes, cannot perfectly fit the visual effect of the human eye, and cannot meet the increasingly strict photography needs of modern customers. SUMMARY OF THE INVENTION [0004] In view of the problems existing in the prior art, the present inven...

AI Technical Summary

Problems solved by technology

[0003] The traditional automatic exposure algorithm obtains a single and fixed target brightness value, and has weak adaptability to different environmental scenes. It cannot perfectly fit the visual effect of the human eye, and cannot meet the increasingly stringent photography needs of modern customers.

Images