A quantitative quality model for gesture based user interfaces

The technological advancement of computers and cameras over the past few years has given us the ability to control objects without touching them. There have already been a number of attempts at producing gesture based applications, but many of them have usability issues. This paper proposes a model that reflects the usability of a gesture based interface, in order to evaluate and improve a gesture-controlled system. The model defines four levels of abstraction, with the higher levels based on the lower ones. The levels of the model allow us to propose quantitative notions for 1) the parameters affecting the quality of individual gestures, 2) the overall quality of a gesture, 3) the quality of particular functionalities, or use cases, in a system, and 4) the overall quality of a system. The model was evaluated using an existing gesture-based interface for a popular media center application.