“…Mid-air gesture interaction has been extensively researched as an alternative to other modes or as a complementary mode of interaction in a variety of settings such as entertainment [6,44,47], automotive industry [19,28,39,46,50], medical applications [10,26,31,43,54], wearable computing [4,14,15,17], smart home control [18,60,64], virtual reality manipulation [23,65], and art installations [36,37]. Such interaction is particularly interesting where other modes are dangerous, hard, or impossible to use.…”