一:一些评价指标
对于cv领域来说,常使用以下指标表示评价一个检测或者分类方法的好坏
Precision: precision for a class is the number of true positives (i.e. the number of items correctly labeled as belonging to the positive class) divided by the total number of elements labeled as belonging to the positive class;
Recall: the number of true positives divided by the total number of elements that actually belong to the positive class;
二:Confusion Matrix
则有
precision=t