为了实现对田间水稻缺素的精准识别，构建一个图像识别系统.对该系统所采用的图像采集、图像分割、基于支持向量机图像分类等算法进行研究.首先，根据田间水稻的缺素现象进行图像采集和处理.然后提取图像与氮元素相关的颜色特征.在分析比较 SVM 算法对图像分割的基础上，提出一种基于改进粒子群算法进行 SVM 参数优化算法模型(即 IPSO-SVM).最后，对实验进行设置，对算法模型与其他算法进行测试对比.实验结果表明：对水稻缺素诊断的准确率达到95．45％，基本满足田间水稻缺素的科学诊断要求.
In order to realize the precise identification of the missing elements in the field of rice,an image recognition system was constructed.The image acquisition,image segmentation and image clas-sification based on support vector machine are studied in this system.Firstly,image acquisition and processing were carried out according to the phenomenon of deficiency of rice in the field.Then the color features were extracted related to the image of nitrogen elements.On the basis of analyzing and comparing the SVM algorithm to image segmentation,an improved particle swarm optimization algo-rithm is proposed to optimize the SVM parameters (i.e.IPSO-SVM).At last,the experiment is set up,and the algorithm model is tested and compared with other algorithms.The experimental results show that the accuracy rate of the diagnosis of rice deficiency is 95.45%,which basically meets the re-quirements of the scientific diagnosis of the deficiency of rice in the field.
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