Hull convexity defects features for human activity recognition. - M. M. Youssef; K. Vijayan Asari; Richard C. Tompkins; Jacob Foytik (AIPR, 2010)

Human action recognition using hull convexity defect features with multi-modality setups. - M. M. Youssef; Vijayan K. Asari (Pattern Recognit. Lett., 2013)