基于Fisher变换的植物叶片图像识别监督LLE算法  

Recognition Method of Plant Leaves Based on Fisher Projection-supervised LLE Algorithm

作　　者：阎庆[1,2] 梁栋[2] 张晶晶[1] 

机构地区：[1]安徽大学电气工程与自动化学院,合肥230039 [2]安徽大学电子信息工程学院,合肥230039

出　　处：《农业机械学报》2012年第9期179-183,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(61172127);高等学校博士学科点专项科研基金资助项目(20113401120006);安徽大学211创新团队项目(KJTD007A);安徽大学"211工程"青年科学研究基金资助项目(KJQN1114)

摘　　要：提出一种基于Fisher投影的监督LLE方法,应用于植物叶片图像识别中。该方法利用Fisher投影距离取代样本的测地距离,并以此为基础计算样本的权值,加入LLE算法的代价函数中。该方法克服了传统LLE算法无监督学习不适应分类问题的缺陷,在抑制噪声点影响的同时可以更好地挖掘样本的类别信息,提高叶片的分类精度。基于实拍植物叶片图像数据库的实验结果证明,该算法的平均识别率达到92.36%。A new supervised weighted LLE method based on the Fisher projection was proposed. This method utilized the Fisher projection distance to replace the sample＇s geodesic distance, and the importance score of each sample was obtained based on this distance, then the importance scores were added into the cost function of LLE. This method can overcome the disadvantage of traditional LLE, an unsupervised learning algorithm which cannot solve the classification problem very well, and can exploit the category information better and reduce the influence of noise points at the same time. The experimental results based on the real-world plant leaf databases show its mean accuracy of recognition is up to 92.36%.

关 键 词：植物叶片 识别 特征提取 监督局部线性嵌入 流形学习 FISHER变换 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]