(question about biometrics) What is the difference between these ROC curves?

2 次查看（过去 30 天）
ZhG
ZhG 2014-3-19
评论： Image Analyst 2014-3-19
Hello,
I am reading something about ROC curve. And I found that the curve is different given in different publications. So, I am a little confused, and I found these curves with Google. But I am wondering why they are different? And how can I know which area is the AUC (area under curve) for different ROC plot?
Thanks.

请先登录，再回答此问题。

回答（1 个）

Image Analyst
Image Analyst 2014-3-19
I always see ROC curves like your middle one. That's like the one in Wikipedia. Perhaps some people have plotted things differently for some reason that they gave in their papers - I don't know since I didn't read their papers. I think the area under the curve would be calculated by summing the curve values when plotted linearly, not on a log plot.
  2 个评论
ZhG
ZhG 2014-3-19
Do you mean that the 1st one is only log plot, otherwise it would be the same to the one in the middle?
Image Analyst
Image Analyst 2014-3-19
I think FRR must be different than True Positives because the curves bend in the opposite direction. Normally for algorithms that are good at detecting, the curve bends up and to the left.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 ROC - AUC 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by