|
|
Automatic checking of pointer automotive dashboard
based on HSI model and Hough transformation |
ZHOU Hong, XU Hai-er, GENG Chen-ge |
Department of Instrument Science and Engineering, Zhejiang University, Hangzhou 310027, China |
|
|
Abstract A novel approach for pointer automotive dashboard automatic checking was presented as the traditional manual checking method having a low accuracy. When taking images, the dashboard’s color information was high in abundance and there was a shadow around the object, so, the RGB model image was converted to HSI (Hue, Saturation, Intensity) model avoiding the influence of shadow. Then with the Hue and Saturation as two characteristic parameters, the image was segmented. After that, the objects were detected by means of the Hough transformation. The deflection angles, the movements of the pointer from the zero position, were calculated when the pointer pointing to the main marks. Comparing the deflection angle to the standard angle, the dashboard would be modified again if it was out of the error range. Experiments on the dashboard in the common use demonstrate that the proposed approach has a nice precision and increases the checking accuracy.
|
Published: 16 July 2010
|
|
基于HSI模型和Hough变换的指针式汽车仪表自动校验
为了克服传统的汽车仪表人工校验普遍存在准确率不高的弊端,提出一种指针式汽车仪表自动校验算法.针对汽车仪表盘颜色信息丰富的特征和采集图像时目标物体周边有阴影的现象,将RGB模型下的表盘图像转到HSI(色调、饱和度、亮度)模型以消除阴影影响,并利用色调和饱和度分量作为特征参数进行图像分割,并采用Hough变换检测目标;分别计算出指针指向主要刻度线时相对于零刻度线的偏转角,并与相对应的标准偏转角比较,若超过允许误差范围则返回重调.对常用汽车仪表盘的自动校验结果表明该算法精度好,校验准确率高.
|
|
[1] 孙风杰,郭凤顺.基于图像处理技术的表盘指针角度识别研究\ [J\].中国电机工程学报,2005,25(16): 7378.
SUN Fengjie,GUO Fengshun. Studies of the recognition of pointer angle of dial based on image processing \ [J\]. Proceedings of the CSEE, 2005, 25(16): 7378.
[2] 王三武,戴亚文.多指针水表自动识别系统\ [J\].仪器仪表学报,2005,26(11):11781180.
WANG Sanwu,DAI Yawen. Automatic recognizing of Multipointer’s water meter using image processing\ [J\]. Chinese Journal of Scientific Instrument, 2005, 26(11): 11781180.
[3] 罗大成,王仕成,曾洪贵,等. 指针式仪表识别系统的设计\ [J\]. 激光与红外,2007,37(4): 377380.
LUO Dachen,WANG Shicheng, ZENG Honggui,et al. Design of recognition system of analog measuring instruments \ [J\].Laser and Infrared, 2007, 37(4): 377380.
[4] 刘晓芳,陈丹松,刘家锋,等.采用改进HSI模型的车牌区域检测和定位方法\ [J\].哈尔滨工业大学学报,2008,40(1): 8589.
LIU Xiaofang,CHENG Dansong,LIU Jiafeng. An approach to detection and location for license plate based on modified HSI color model \ [J\].Journal of Harbin Institute of Technology, 2008,40(1): 8589.
[5] ZHANG Yujin, YAO Yurong, HE Yun. Color image segmentation based on HSI model \ [J\]. High Technology Letter,1998,4(1): 2831.
[6] LUO Daisheng,HE Xiaohai. Triplet circular Hough transform for circle detection \ [J\].Journal of Electronics,2002,19(4): 356362.
[7] MAO Xia,LI Xingxin, XUE Yuli. Circle detection based on HSI color space\ [J\]. Computer Aided Drafting: Design and Manufacturing, 2005, 15(1): 3640.
[8] MATAS J, GALAMBOS C, KITTLER J. Robust detection of lines using the progressive probabilistic hough transform \ [J\].Computer Vision and Image Understanding, 2000: 78(1):119137.
[9] SNYDER W E, QI Hairong. Machine vision \ [M\]. Beijing:China Machine Press, 2005: 111220.
[10] PA M. MARAGOS P, SCHAFER R W.Morphological system for multidimensional signal processing \ [J\]. Proceeding of the IEEE, 1990, 78(4): 690701.
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|