where,
• True positive TP: occurs when the algorithm detects a
change, and there is a change.
• False positive FP: corresponds to situations where the
algorithm detects a change, whereas there is no change.
• False negative FN: occurs when the algorithm does not
declare a change and there is a change, also known as
missed detection.
• True negative TN: the algorithm does not declare a
change and there is no change.