Motivation System Design Experimonts Coodusio 动京大盛 Measure the depth of finger tapping o Measure the bending angle of the finger o Deep finger tapping:camera-based model Camera 00.0,0 Gentle finger tapping:ultrasound-based model Microphone z↑M%.0.0 (x(t).yuxz(t]) Fa(x(0),y(0,z0) Camera 00,0.0) Speaker s020,0y ·口0,4t·子·2刀00 Ke Sun,et al Mobisys'18 June 3.2018 Depth Aware Finger Tapping on Virtual Display 14/22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Motivation System Design Experiments Conclusion Measure the depth of finger tapping Measure the bending angle of the finger Deep finger tapping: camera-based model Camera 4(0,0,0) @(?) 2(0) 2(?) y x z Gentle finger tapping: ultrasound-based model Camera 4(0,0,0) x z 3 @(?) y Microphone ;(2), 0,0) Speaker <(2*, 0,0) 0=(# 0 , & 0 , D 0 ) 0>(# ? , & ? , D ? ) Ke Sun, et al. Mobisys’18 June 3, 2018 Depth Aware Finger Tapping on Virtual Display 14 / 22