NEC Corporation Face mask wearing detection and crowd monitoring by video analytics AI #3 2020.12.23 #RA2 Use of ICT and IoT for contact reduction #NEC NEC Corporation Face mask wearing detection and crowd monitoring by video analytics AI #2 2020.12.11 #RA2 Use of ICT and IoT for contact reduction #NEC NEC Corporation Face mask wearing detection and crowd monitoring by video analytics AI 2020.11.02 #RA2 Use of ICT and IoT for contact reduction #NEC NEC Corporation