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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:

31

期数:

2001年第6期

页码:

74-77

栏目:

交通运输工程

出版日期:

2001-11-20

文章信息/Info

Title:

Direction Detection for Automobile Headlamp Beam Based on Digital Computer Image Processing

作者:

闵永军;  翟羽健

东南大学仪器科学与工程系,南京 210096

Author(s):

Min Yongjun;  Zhai Yujian

Department of Instrument Science and Engineering, Southeast University, Nanjing 210096, China)

关键词:

汽车前照灯;  光轴方向;  CCD摄像机;  特征像素点;  检测

Keywords:

automobile headlamp;  direction of beam;  CCD camera;  characteristic pixel;  detecting

分类号:

U270.7

DOI:

10.3969/j.issn.1001-0505.2001.06.018

摘要:

通过CCD摄像机将前照灯光束在汽车正前方与汽车纵向轴线垂直的2个预定位置投影测量屏幕上的2帧投影图像输入计算机,根据远、近光投影图像的特点,用有限邻域最大值搜索法确定远光投影图像几何中心位置,将近光图像转换成二值图像找出投影图像明暗截止线转角位置,从而确定前照灯远、近光束照射方向.基于该方法可实现汽车前照灯远、近光束照射方向的全自动检测,从根本上解决目前国内各类汽车前照灯检验仪存在的问题.

Abstract:

Two screens were fixed in advance at different positions right in front of automobile. and perpendicular to automobile longitudinal axis. Two projections on the measuring screens were conveyed into computer by a CCD camera. Different methods were taken to process the images of far and lower beam according to their features. The center position of far beam projection image can be determined by searching for the maximum grey level in the neighborhood. By means of image sharpening, the original images of lower beam were transformed into binary image, the position of turning point of the boundary between bright part and dim part of projection can be determined by boundary pixel. Thus, the direction of far and lower beam can be detected. Based on above methods, the direction of far and lower beam of automobile headlamp can be detected automatically. The essential shortcomings of current domestic instruments can be overcome.

备注/Memo

备注/Memo:

作者简介:闵永军,男,1963年生,博士研究生,副教授.

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更新日期/Last Update: 2001-11-20