Table 1.
Classification of detection events and rates.
Definition | Calculation | |
---|---|---|
Event | ||
Number of Events | Total number of events both fire and non-fire | |
Hit/True Positive | Fire that is detected | = total number of actual fires detected |
Miss/False Negative | Fire that is not detected | |
False Alarm/False Positive | Non-fire event that is (incorrectly) detected | = total number of non-fire events detected |
Correct Rejection/True Negative | Non-fire event that is (correctly) not detected | |
Rate | ||
False Alarm Rate | Proportion of non-fire events (incorrectly) detected | |
Hit Rate or Sensitivity | Proportion of actual fire events that are detected | |
Miss Rate | Proportion of actual fire events that are not detected | |
Correct Rejection Rate or Specificity | Proportion of non-fire events that are (correctly) not detected | |
Precision | Proportion of detected events that are actually fires |