19 Oct 2004
CS 5244: Library Evaluation
29
¡ Look at the probability or rate of detection
¡
¡What does the
diagonal represent?
¡
¡How do we compare
ROC curves versus
each other?
¡
ROC Curve
1
0
1
0
False Positive Rate
(Prob of False Alarm = 1 – Specificity)
Text Box: True Positive Rate (Prob of Detection = Sensitivity)
True Positive Rate
(Prob of Detection = Sensitivity)
ROC – Receiver Operator Characteristics – used by radarmen in WW II by servicemen to differentiate between radar blips as planes and false alerts.  Was only applied to signal processing / IR in the 1970’s.