All weather exposure gaining automatic regulation method and system

A technology of exposure gain and automatic adjustment, which is used in exposure control, TV system components, optics, etc. It can solve the problem that exposure and gain parameters are not designed, the gray value of users cannot be well achieved, and the image brightness cannot meet user requirements. and other problems to achieve the effect of improving image quality

Active Publication Date: 2012-10-10
BEIJING DAHENG IMAGE VISION
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Problems solved by technology

However, currently existing cameras only design how to adjust the exposure and gain parameters to achieve the gray value expected by the user in the daytime and nighttime state, but when the transition state from day to night and the transition state from night to day, the camera does not The method of designing how to adjust the exposure and gain parameters cannot well achieve the gray value expected by the user, and the brightness of the captured image cannot meet the user's requirements

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  • All weather exposure gaining automatic regulation method and system

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Embodiment Construction

[0042] Such as figure 1 As shown, the all-weather exposure gain automatic adjustment method of the present invention includes the following steps:

[0043] Step 1: Calculate the actual gray value of the captured image;

[0044] Step 2: Make the following judgments based on the actual gray value calculated in Step 1:

[0045] If the actual gray value is less than or equal to the expected gray value set at night, enter the night mode;

[0046] If the actual gray value is greater than or equal to the desired gray value set during the day, enter the day mode;

[0047] If the actual grayscale value is less than the expected grayscale value set during the day and greater than the expected grayscale value set at night, then judge the state of the strobe light at this time: if the strobe light is off at this time, enter the transition from daytime to nighttime mode; if the strobe light is on at this time, it will enter the transition mode from night to day; (It should be mentioned th...

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Abstract

The invention discloses an all weather exposure gaining automatic regulation method and an all weather exposure gaining automatic regulation system. The method comprises the following steps which are repeatedly executed: calculating an actual grey scale value of the shooting image; judging the state according to the calculated actual grey scale value and entering a corresponding mode; and calculating an exposure value and a gain value according to a corresponding user expected grey scale value set in the corresponding mode, adjusting a camera according to the calculated exposure value and gain value, and then shooting. The system comprises a grey scale value computation module, a grey scale value judgment module, a strobe lamp judgment module and an adjustment module. According to the illumination intensity under a shooting environment, the system can enter the corresponding mode, the exposure and gain parameters of the camera can be rapidly and automatically adjusted, so that the grey scale value of an image can achieve the grey scale value expected by a user, the best shooting effect is obtained, and the shooting image quality is improved.

Description

technical field [0001] The present invention relates to an all-weather exposure gain automatic adjustment method and system, in particular to a all-weather automatic adjustment method and system for camera exposure parameters and gain parameters. Background technique [0002] At present, the camera is provided with two modules of automatic exposure adjustment and automatic gain adjustment, which control the brightness of the captured output image by adjusting the exposure and gain parameters of the imaging sensor of the camera. When the camera parameters (exposure, digital gain, analog gain) are constant, the brightness (gray value) of the image captured by the camera will change with the light intensity of the shooting environment. Therefore, in the process of using the camera, in order to To adapt to the senses of the human eye, the grayscale value of the captured image should be kept at a certain level. Therefore, according to the light intensity in the shooting environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235G03B7/00G03B15/05G03B7/17
Inventor 宋伟铭路鹏郭勇军周中亚赵祖轩王丽丽
Owner BEIJING DAHENG IMAGE VISION
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