不同核函数RVM的冰凌检测能力比较

Comparison of River Ice Detection Capabilities of Different RVM Kernel Function

利用HJ-1A/1B卫星CCD数据进行黄河凌汛监测,提出了利用相关向量机的检测冰凌,并对比了不同核函数的冰凌检测效果。实验结果显示利用RVM和HJ-1A/1B卫星CCD数据能有效提取出黄河冰凌范围,RBF核函数的稳定性和精度要高于改进型RBF核函数,但改进型RBF核函数的相关向量的个数要明显少于RBF核函数,因此测试速度要高于RBF核函数。

In this paper we presented a river ice detection method based on relevance vector machines(RVM) use HJ-1A/1B CCD data,and compared ice detection accuracy of the different kernel functions.Experimental results clearly demonstrated that RBF kernel function was more stabile than adapted RBF kernel,detection accuracy of RBF kernel function was slightly higher than adapted RBF kernel,however the sparsity of adapted RBF kernel was higher than RBF kernel function which lead to much faster testing time.