吉林大学学报(信息科学版) ›› 2017, Vol. 35 ›› Issue (6): 617-622.

• 论文 • 上一篇    下一篇

直喷汽油机喷雾图像特征提取方法

商微微 1 , 任桐慧 2   

  1. 1. 长春大学 电子信息工程学院, 长春 130022; 2. 长春光华学院 电气信息学院, 长春 130012
  • 收稿日期:2017-08-20 出版日期:2017-12-29 发布日期:2018-03-14
  • 通讯作者: 任桐慧(1990— ), 女, 长春人, 长春光华学院讲师, 主要从事图像处理和模式识别研究, (Tel)86-18604403635(E-mail)1160068448@ qq. com。
  • 作者简介: 商微微(1986— ), 女, 长春人, 长春大学讲师, 主要从事压缩感知、 图像处理和模式识别研究, (Tel)86-13843073231(E-mail)shangww524033@163. com

Feature Extraction Method for Gasoline Direct Injection Spray Image

SHANG Weiwei 1 , REN Tonghui 2   

  1. 1. College of Electronic and Information Engineering, Changchun University, Changchun 130022, China;
    2. Institute of Electricity Information, Changchun Guanghua University, Changchun 130012, China
  • Received:2017-08-20 Online:2017-12-29 Published:2018-03-14

摘要: 为解决可视化燃油喷射图像采集系统的喷雾图像对比度低、 边界雾化不清晰的问题, 提出了一种基于均
衡化直方图自适应求取阈值的二值化和图像特征检测算法。 该算法根据对比度增强后的喷雾图像的直方图性
质, 自适应求取二值化阈值, 通过自动检测喷嘴位置、 喷雾图像最外侧切线以及喷雾最远点位置, 确定喷雾贯
穿距离和喷雾椎角, 然后通过计算得到喷雾图像这两个特征参数, 并对喷油全过程采集的 25 幅图像进行处理。
实验结果表明, 该方法能较清晰准确地提取喷雾图像轮廓, 喷雾贯穿距离和喷雾锥角两个特征参数的变化趋势
和理论值具有良好的一致性。

关键词:  图像处理, 喷雾锥角, 特征提取, 喷雾贯穿距离

Abstract:  In order to solve the problem that the spray image acquired through visual fuel injection image
acquisition system is low contrast and the boundary is not clear. A binarization algorithm of adaptive threshold
value based on equalization histogram is presented. According to the histogram properties of the aerosol image
enhanced by contrast enhancement, the algorithm can get the adaptive binarization threshold. According to the
binarization result, the image contour is extracted, the nozzle position, spray image outermost tangent, and spray
farthest point position can also be detected automatically while the two characteristic parameters of spray image
the spray penetration and spray angle can be calculated. 25 images collected in a whole process of fuel injection
are processed. The experimental results show that the method can extract the contour of the spray image more
clearly and accurately. The trend of change in the spray penetration and the spray angle is in accordance with the
theoretical value.

Key words: feature extraction, spray angle,  image processing, spray penetration

中图分类号: 

  • TP751