Automatic exposure regulating method for camera

Abstract

The invention discloses an automatic exposure regulating method for a camera. The method comprises the following steps of: counting raw data of a frame of shot image, and calculating the quantity of unsaturated blocks in the raw data and the unsaturation rate of the raw data; and by using the unsaturation rate, judging whether the exposure of the camera is required, and performing exposure regulation on the camera. By adoption of the method, an automatic exposure function of a high-definition camera can be well realized, a scene can be intelligently and automatically determined and identified, exposure time can be automatically regulated, and a good image can be shot. By checking and determining an actual scene in real time, the exposure time and gain are regulated, day operation and night operation can be accurately distinguished, and a flashlight which is used at night or a continuous light can be controlled, so that the camera adopting the method can be applied to various kinds of light rays and scenes. The method has the advantages that: the application range of the high-definition camera is greatly expanded; and a real-time scene image can be well shot.

Description

technical field [0001] The invention relates to the field of traffic camera exposure technology equipment, in particular to a camera automatic exposure adjustment method. Background technique [0002] The exposure time of the camera refers to the time interval from the shutter opening to closing. During this period, the longer the exposure time, the more luminous flux enters, which is suitable for poor light conditions; otherwise, the less luminous flux enters, which is suitable for light comparison. In a good situation; therefore, in different light environments outside, it is necessary to choose different exposure times to obtain photos with appropriate brightness. Gain is the magnification of the camera signal, the larger the value, the brighter the image, otherwise, the darker the image. The automatic exposure algorithm of the camera is to obtain an image with suitable brightness by adjusting the exposure time and gain of the camera. At present, the automatic exposure ...

AI Technical Summary

Problems solved by technology

[0003] 1. The camera is not accurate enough to detect the light intensity of the scene, and cannot accurately adjust the automatic exposure time

[0004] 2. The automatic exposure system cannot work normally under strong or weak light conditions

[0005] 3. Under the condition of strong backlight in intelligent transportation, the correct scene image cannot be obtained

[0006] The main reason for the above shortcomings and deficiencies of the automatic exposure technology in the above camera is that the internally designed automatic exposure algorithm is not perfect or the internal circuit design has defects, which cannot make the camera shoot correct scene images in complex shooting environments

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