Our gesture alphabet consists in four hand gestures and four hand directions in order to fulfil the
application’s requirements. The hand gestures correspond to a fully opened hand (with separated fingers), an
opened hand with fingers together, a fist and the last gesture appears when the hand is not visible, in part or
completely, in the camera’s field of view. These gestures are defined as Start, Move, Stop and the No-Hand
gesture respectively. Also, when the user is in the Move gesture, he can carry out a Left, Right, Front and
Back movements. For the Left and Right movements, the user will rotate his wrist to the left or right. For the
Front and Back movements, the hand will get closer to or further of the camera. Finally, the valid hand
gesture transitions that the user can carry out are defined in Fig. 3.
Our gesture alphabet consists in four hand gestures and four hand directions in order to fulfil theapplication’s requirements. The hand gestures correspond to a fully opened hand (with separated fingers), anopened hand with fingers together, a fist and the last gesture appears when the hand is not visible, in part orcompletely, in the camera’s field of view. These gestures are defined as Start, Move, Stop and the No-Handgesture respectively. Also, when the user is in the Move gesture, he can carry out a Left, Right, Front andBack movements. For the Left and Right movements, the user will rotate his wrist to the left or right. For theFront and Back movements, the hand will get closer to or further of the camera. Finally, the valid handgesture transitions that the user can carry out are defined in Fig. 3.
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