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综合颜色和形态特征的小麦田杂草识别方法

朱伟兴 金飞剑 谈蓉蓉   

  1. 江苏大学 电气信息工程学院 江苏大学 电气信息工程学院 研0503班 江苏大学 电气信息工程学院
  • 收稿日期:2007-05-28 修回日期:2007-07-20 发布日期:2007-11-01 出版日期:2007-11-01
  • 通讯作者: 金飞剑

Weed recognition method based on color and morphological features in wheat field

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  • Received:2007-05-28 Revised:2007-07-20 Online:2007-11-01 Published:2007-11-01
  • Contact: Fei-Jian JIN

摘要: 利用机器视觉技术把杂草精确识别出来是精细农业领域研究的热点问题之一。针对杂草与小麦叶子交叠的情况,提出一种综合颜色和形态特征的方法进行杂草识别。在L*a*b*颜色空间,选取a*作为特征量并用改进的最大类间方差法进行阈值分割获得植物图像;在HSI颜色空间,利用多层的同质性分割算法分离小麦与杂草;结合形态学特征开闭运算滤波及二值逻辑与运算获得杂草图像;模拟化学除草系统,从理论上评价整个系统的识别效率。实验结果表明:杂草正确识别率高达92.6%以上,且除草剂的使用量减少超过72.4%。

关键词: 杂草识别, 机器视觉, 形态学, 同质性, 与运算

Abstract: The technology of weed recognition based on machine vision becomes a hot issue of precision agriculture. Concerning the severe occluding of leaves of weed and wheat, a weed identification method was proposed with color and morphological features. Color feature was utilized to distinguish plants and background: a* was taken as characteristic variant in L*a*b* color space, and the improved method of maximum classes square error was taken as the criterion; Color feature was utilized to distinguish wheat and weed: hierarchical approach was used to color image segmentation in HSI color space; Morphological feature was utilized to obtain weed: using morphological opening and closing filter, and AND operation algorithm. The proposed methods together with a chemical weeding system were simulated and the efficiency of the overall system was evaluated theoretically. The experimental results on a series of weed images show that the correct identification rate exceeds 92.6%, and the herbicide reduction rate exceeds 72.4%.

Key words: weed recognition, machine vision, morphological, homogeneity, AND operation