“…Sensor-based approaches extracts the hand measurements, i.e., joints orientation, hands position, and hand velocity [ 11 ], and can be conducted using microcontrollers and specific sensors, such as data gloves [ 12 , 13 ], power gloves [ 14 ], digital camera [ 15 ], accelerometer [ 16 , 17 ], depth camera [ 18 ], Kinect [ 19 ], leap motion controller [ 20 ], dexterous master gloves [ 21 ], etc. The advantage of the sensor-based approach is the higher recognition rate because of the skeletal data [ 22 ]. However, sensor-based approaches are expensive, allow limited movement, require specialized devices, environment, and training to utilize the systems fully [ 22 ].…”