METHOD AND SYSTEM FOR ACTIVITY RECOGNITION AND ITS APPLICATION IN FALL DETECTION

摘要

The invention relates to an activity recognition method, which comprises the steps of deriving (120) a feature vector characterizing an activity from sensing data associated with the activity; classifying (130) the activity on the basis of the feature vector and at least one one-class classifier model relating to known activities so as to determine whether the activity is a known activity or an unknown activity; and training (140) a temporary one-class classifier model relating to an unknown activity when the activity is determined as an unknown activity. In an embodiment, the method further comprises a step (150) of classifying the activity on the basis of the feature vector and a multi-class classifier to identify the group to which the known activity belongs, when the activity is determined as a known activity. By identifying an activity as a known or unknown activity, and further training an identified unknown activity, the method reduces the probability of classifying a new activity as a known activity by mistake.