Equal Error Rate (EER)
2017-04-25 13:28
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最近在做视频异常检测的论文,看到人家论文中有一项指标叫EER(Equal Error Rate),于是我也想算一算,结果google、baidu了半天,各种百科里没有一个像样的定义,更别提如何计算了。最后在一个matlab论坛里找到了正解:
“the Equal Error Rate (EER) is the point on the ROC curve that corresponds to have an equal probability of miss-classifying a positive or negative sample. This point is obtained by intersecting the ROC curve with a diagonal
of the unit square. ”
翻译过来就是:EER是(一个分类器的)ROC曲线(接受者操作特性曲线)中错分正负样本概率相等的点(所对应的错分概率值)。这个点就是ROC曲线与ROC空间中对角线([0,1]-[1,0]连线)的交点(如下图所示)。
所以下图表示的分类器的EER应该是蓝色虚线和红色ROC曲线的交点对应的横坐标值,在0.17左右。
(关于什么是ROC曲线,请大家点链接看维基百科吧。)
“the Equal Error Rate (EER) is the point on the ROC curve that corresponds to have an equal probability of miss-classifying a positive or negative sample. This point is obtained by intersecting the ROC curve with a diagonal
of the unit square. ”
翻译过来就是:EER是(一个分类器的)ROC曲线(接受者操作特性曲线)中错分正负样本概率相等的点(所对应的错分概率值)。这个点就是ROC曲线与ROC空间中对角线([0,1]-[1,0]连线)的交点(如下图所示)。
所以下图表示的分类器的EER应该是蓝色虚线和红色ROC曲线的交点对应的横坐标值,在0.17左右。
(关于什么是ROC曲线,请大家点链接看维基百科吧。)
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