Detection method for automatic day and night switching and quick automatic exposure

Abstract

The invention provides a detection method for automatic day and night switching and quick automatic exposure. The method comprises the following steps: S1, setting a first photosensitive unit and a photosensitive device sensitive to low illumination, enabling a processing unit to carry out the judgment of day and night switching, and accurately setting a camera optical filter in advance; s2, setting a second photosensitive unit which is a photosensitive device sensitive to medium and high illumination and is used for detecting the light intensity of the current environment; s3, after the processing unit is powered on and started, reading and processing the values of the first photosensitive unit and the second photosensitive unit at the first time, and judging whether the current time is day or night so as to set a camera optical filter; setting an automatic exposure parameter through the value of the second photosensitive unit; and S4, the camera obtains image or video data and then sends the image or video data to a processing unit, and after the processing unit receives the image or video data, fine adjustment is carried out on the basis of the automatic exposure parameters set in the S3 according to the brightness of the image or the video so as to shorten the convergence time of the automatic exposure.

Description

technical field [0001] The invention relates to the field of image capture, in particular to a detection method for automatic day and night switching and rapid automatic exposure. Background technique [0002] With the rapid development of computer technology, especially in the field of image capture, specifically, the day-night mode switching method and device in the prior art, and the camera device with automatic exposure are increasingly becoming a demand trend. Especially camera devices that need to quickly output pictures, such as battery-type low-power camera products, which are usually in a standby state (the main control SOC system is powered off). Status and ambient light intensity (automatic exposure parameter setting). [0003] Day and night mode automatic switching is one of the necessary functions of the front-end camera device. The front-end camera device can determine whether the day mode or the night mode is currently used according to factors such as light...

AI Technical Summary

Problems solved by technology

[0007] 1. A single photosensitive detection unit can only be used as a data source for day and night switching judgment detection;

[0008] 2. The photosensitive unit does not help fast automatic exposure; if the single photosensitive unit is used for automatic exposure, there will be inaccurate detection of low light intensity, which will affect the day and night switching function

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