Accuracy to identify time of occurrence of a freezing episode (FE) by each method.

Scenario 2 represents the time where a FE was identified only in the video, scenario 3 the time where a FE was identified only by the method, and scenario 4 the time where both, video and method, identify a FE. Accuracy is represented by the probability of occurrence of scenario 4 among scenarios 2, 3, and 4.