Typing in thin air
Helena Roeber, John Bacus, Carlo Tomasi · 2003
Canesta Keyboard is a novel interface to electronic devices that consists of a projection system and a sensor module instead of the mechanical switches of a traditional keyboard. Users input text by pressing keys on a projected image of a keyboard. This paper describes the advantages and drawbacks of this interface compared to existing input methods for mobile devices in terms of data entry speed, error rate, user satisfaction and physical size as revealed through usability testing.