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Dynamic adjustment method of exposure time of embedded vehicle camera

A technology of exposure time and car camera, which is applied to TV, color TV parts, TV system parts, etc. It can solve the problems of long adjustment time, high algorithm overhead, and inability to fully transplant embedded car cameras, etc. adaptive effect

Active Publication Date: 2020-08-07
HUBEI UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0029] The technical problem to be solved by the present invention is: the adjustment time of the existing digital camera automatic exposure method is long, the algorithm cost is large, and the problem that it cannot be completely transplanted to the embedded vehicle camera

Method used

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  • Dynamic adjustment method of exposure time of embedded vehicle camera

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Embodiment Construction

[0047] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0048] Such as figure 1 , the present invention provides a method for dynamically adjusting the exposure time of an embedded vehicle camera, comprising the following steps:

[0049] Step 1: Calibrate the vehicle camera to obtain the maximum exposure time T of the camera max and the minimum exposure time T min , and the maximum brightness value L of the image captured by the camera max and the minimum brightness value L min ;

[0050] Step 2: Initialize the on-board camera, set the default exposure time of the camera to t 0 , Set the image target brightn...

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Abstract

The invention discloses a method for dynamically adjusting the exposure time of an embedded vehicle-mounted camera. The method includes: firstly, calibrate and initialize the vehicle-mounted camera, calculate and obtain the exposure information of the first frame of image, and then obtain the exposure information of the first frame of image according to the exposure information of the first frame of image. The exposure time of the two frames of images, calculate and obtain the exposure information of the second frame of images, and finally obtain the exposure time of the next frame of images according to the exposure information of the first two frames of images. The exposure time adjustment method of the embedded vehicle camera provided by the invention has strong adaptability, high efficiency, real-time performance and stability.

Description

technical field [0001] The invention relates to the field of automatic driving, relates to the field of image perception and image processing in automatic driving or safety assisted driving, and provides a method for dynamically adjusting the exposure time of an embedded vehicle camera. Background technique [0002] Vehicle cameras are one of the most commonly used sensors in automatic driving systems or safety assistance driving systems. Under normal circumstances, the automatic driving system analyzes the images captured by the camera to achieve the purpose of perceiving the surrounding environment and assisting driving safety. [0003] Existing vehicle-mounted cameras are all simple cameras, and the images and video images captured by them are relatively limited. When the camera is exposed to strong light, such as when the headlights of the opposite vehicle shine on the vehicle-mounted camera, the images captured by the vehicle-mounted camera will be clear. The brightnes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/235
CPCH04N23/741H04N23/73
Inventor 何涛王正家解家月何嘉奇陆啸龙潘健
Owner HUBEI UNIV OF TECH
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