针对在杂草图像分割方面存在使用阈值分割需要选择分割阈值、图像分割精度不高等不足,本文结合超绿特征分割算法和SOFM网络,构造出一种杂草图像识别模型--G-SOFM空间聚类模型.该方法是一种无监督学习方式,不需要指定阈值,利用网络自组织、自竞争的特性,实现对杂草图像的分割.在对图像进行超绿特征处理之后,使用超绿特征的灰度和归一化两个特征向量,实现SOFM空间聚类.实验结果表明,改进的G-SOFM方法相比其他三种杂草图像分割算法的分割结果都有一定的提高,分别比HIS阈值分割、超绿特征分割、双阈值分割提高28%、20%、21%.本算法结合后期形态学去噪后,识别正确率可达94%.%As for the weeds image recognition model, the G-SOFM spacial clustering model is developed especially for the shortage that segmentation threshold should be selected on the weeds image segmentation by threshold segmentation, which is combined with the segmentation algorithm of super green features and the SOFM network. This method is an unsupervised learning way without a specified threshold, which realizes the weeds image segmentation via the network’s characteristics of self-organization and competition. However, SOFM spatial clustering is achieved through the two eigenvectors of gray scale and normalization in the super green feature after processing. The experimental results show that the segmentation results have got some certain improvement with the improved G-SOFM method,compared with other three kinds of weeds image segmentation algorithms, rising by 25％, 30％ and 28％respectively than the HIS threshold segmentation, the super green characteristics segmentation and the double thresholds segmentation. The identification accuracy can reach 94％ with this algorithm after denoising which is combined with morphology in the later phase.
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