ROC = (True Positives + True Negatives) / Number of evaluation
files
Sample detections of false positives were manually verified. To
determine the source of false positive, files that the recognisers
deemed as having the frog species present were cross-examined against
the manual detection list provided by the Forestry Corporation. This
presented a list of unverified false positive detections – where the
recognisers identified a call, but the original manual detection list
indicated the frog species was not present. A subsample of these false
positive detections was manually verified through audio and visual cues
on Adobe Audition CC. The false positive detection files were reviewed
until the source categories of these false positive detections were
considered consistent.