Automobile data recorder intelligent camera automatic exposure method

A driving recorder and smart camera technology, applied in TV, color TV parts, electrical components, etc., can solve problems such as color distortion, and achieve the effect of appropriate saturation, bright colors and details

Inactive Publication Date: 2017-10-13
武汉云衡智能科技有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the above existing problems in the prior art, and propose a smart camera automatic exposure processing algorithm for driving recorders of automobile driving assistance systems, which solves the problem of color distortion caused by exposure when a certain color is dominant in the driving scene of a car problems, as well as the problem of image brightness display and detail performance in shadow parts in high dynamic contrast, while obtaining appropriate brightness, more vivid colors and more information entropy can be obtained

Method used

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  • Automobile data recorder intelligent camera automatic exposure method
  • Automobile data recorder intelligent camera automatic exposure method
  • Automobile data recorder intelligent camera automatic exposure method

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Embodiment Construction

[0030] Step 1, obtaining the target digital image of the current frame, the target digital image of the previous frame, and the target digital image of the previous frame;

[0031] Step 2, obtain the functional index AeEst of the target digital image of the current frame 1 , the functional index AeEst of the target digital image in the previous frame 2 , The functional index AeEst of the target digital image of the previous frame 3 ;

[0032] Get the exposure time of the target digital image of the current frame AeShutter 1 , Analog gain value AeAgc 1 , digital gain value AeDgain 1 ;

[0033] According to the target digital image of the current frame, the exposure time adjustment step is obtained △Shutter 1 , Analog gain value Adjustment step size △Agc 1 , Digital gain value adjustment step size △dgain 1 ;

[0034] Step 3, obtain the fluctuation variance D of the functional index of the target digital image of the current frame, the target digital image of the previ...

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Abstract

The invention discloses an automobile data recorder intelligent camera automatic exposure method, which comprises the steps of acquiring functional indexes of target digital images of a current frame, a former frame and a former former frame respectively, and acquiring the exposure time, an analog gain value and a digital gain value and corresponding adjusting step lengths of the target digital image of the current frame; comparing fluctuation variance with a set threshold; and performing adjustment on the exposure time, the analog gain value and the digital gain value of the next frame. Exposure images with more appropriate brightness, definition and saturation can be acquired for most driving scenes.

Description

technical field [0001] The invention relates to the field of automatic exposure of an intelligent camera of a driving recorder, which is suitable for a vehicle driving recorder. The present invention can be integrated into the Advanced Driver Assistance System (ADAS), not only can record the video images and audio during the driving process of the car, but also can scan the front vehicles, bicycles, lane lines and traffic signs in real time to obtain clear images Information to provide support for intelligent car driving assistance systems such as adaptive cruise system (ACC), forward collision warning system (FCW), lane keeping system (LKS), lane departure warning system (LDW) and automatic emergency braking system (AEB). Background technique [0002] There are more and more cars, traffic accidents occur frequently, and various incidents of touching porcelain are also heard from time to time, which seriously threatens the life and property safety of drivers, and the driving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235H04N5/243H04N5/76
CPCH04N5/76H04N23/76H04N23/73
Inventor 李吉成朱波何诗洁
Owner 武汉云衡智能科技有限公司
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