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一种基于视觉的车载照明自动跟踪系统

2020-09-02张鹏赵逸凡万茂松

软件导刊 2020年8期

张鹏 赵逸凡 万茂松

摘 要:目前夜间事故勘察车载照明多采用传统自适应灯光,存在照射范围有限且调节照明方向繁琐等问题。因此,基于视觉设计一种车载照明自动跟踪系统。使用视觉处理技术与双步进电机控制对车载照明系统进行改进,以增强车载照明智能化和灵活性。针对传统自适应灯光需人为操纵照射目标的问题,车载照明系统在运行时对红外光源(移动目标)进行图像检测,实时反馈拍摄图像中红外光源位置坐标,再根据位置坐标信息控制双步进电机,帶动车载照明灯准确地照射到红外光源坐标位置。实验结果表明,该系统可快速检测到照明目标位置坐标,准确控制步进电机移动,可满足跟踪目标的要求,准确率达95%。

关键词:视觉处理;红外光源;步进电机;目标跟踪

DOI:10. 11907/rjdk. 201432 开放科学(资源服务)标识码(OSID):

中图分类号:TP319文献标识码:A 文章编号:1672-7800(2020)008-0161-04

Abstract:Aiming at the problems such as limited illumination range and complicated direction adjustment of vehicle lighting system, we propose an automatic tracking system of vehicle lighting based on vision. In order to enhance the intelligence and flexibility of vehicle lighting system, visual processing technology and dual step motor control are used to improve the vehicle lighting system. This vehicle lighting system detects the infrared light source (moving target) in the running time, feeds back the position coordinates of the infrared light source in the shooting image in real time, and then controls the dual-step motor to drive the vehicle lighting to accurately illuminate the coordinates of the infrared light source according to the position coordinate information. Through experimental verification, the system can quickly detect the position coordinates of the lighting target, and accurately control the movement of the stepping motor to complete the requirements of tracking the target.

Key Words:vision processing; infrared light source; stepper motor; target tracking

0 引言

夜间户外作业需要照明,如果照射对象是移动目标,则照明灯需具有目标跟踪功能。目前,照明灯对移动目标的跟踪一般采用人工操作的方式实现[1],这不仅增加了操作人员劳动强度,而且存在跟踪不及时、照明效果差的问题,特别在一些危险作业的场合,如交通事故处理现场,容易发生二次事故,对工作人员的安全构成严重威胁。

车载照明自动跟踪系统现有研究尚未成熟。多数照明控制系统适用于图书馆、大型商场、室内运动场、长廊等大型照明场合,只能对人员所处位置进行检测,从而得到有人区域和无人区域,对有人区域实行高亮度照明,对无人区域则降低照明度或关闭灯具。……

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