Camera auto iris control method and device

Abstract

The invention provides a camera auto iris control method and a device. The method comprises the steps of receiving image signals collected by an image sensor of a camera; processing the image signals by a processor so as to obtain gain values and luminance values of the image signals; adjusting sizes of analog gain signals output by the processor according to the gain values and the luminance values of the image signals by the processor; and adjusting a size of a camera auto iris according to the adjusted analog gain signals. The embodiment of the invention can control the size of the camera auto iris automatically according to the analog gain signals and has the advantages of avoiding flikers and blushing of the collected images, and improving the image quality.

Description

technical field [0001] The invention relates to the technical field of image acquisition, in particular to an automatic aperture control method and device for a video camera. Background technique [0002] At present, for digital surveillance cameras that do not support the use of digital signals to control the automatic aperture, the size of the aperture can only be adjusted manually with a lens with a fixed aperture, or the aperture size of the automatic aperture can be controlled by an analog video signal. The development of digital surveillance cameras is limited. [0003] For some digital surveillance cameras that can use analog video signals to control the automatic iris, when the brightness of the video is increased, it is guaranteed to enhance the brightness of the video at night, but the image will appear white and flickering during the day Situation, at present, for the above situation, it is usually necessary to manually lower the brightness of the image or replac...

AI Technical Summary

Problems solved by technology

[0002] At present, for digital surveillance cameras that do not support the use of digital signals to control the automatic aperture, the size of the aperture can only be adjusted manually with a lens with a fixed aperture, or the aperture size of the automatic aperture can be controlled by an analog video signal. The development of digital surveillance cameras is limited

[0003] For some digital surveillance cameras that can use analog video signals to control the automatic iris, when the brightness of the video is increased, it is guaranteed to enhance the brightness of the video at night, but the image will appear white and flickering during the day Situation, at present, for the above situation, it is usually necessary to manually lower the brightness of the image or replace the lens with a fixed aperture to solve the problem of whitening and flickering of the image. When using the above-mentioned digital monitoring camera with an analog video signal to control the automatic aperture for image acquisition, it is necessary to manually adjust the brightness of the image or replace a different fixed aperture lens according to the light, which is very inconvenient to use, and the operation is cumbersome and waste time

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