| Summary: | The increasing ubiquity of consumer range-imaging camera and handheld projector has led to new human-computer interaction (HCI) systems based on computer vision. In particular, the development of table-top surface-augmenting interfaces, which overlay interactive projections on desk surfaces, has been widely explored by HCI researchers. However, most recent works have focused on incorporating touch-sensing capabilities to the table surfaces, providing 2D point inputs for various UI applications. Additional contexts of interaction, which are either expressed or implied by the user through visual cues available to the sensors, have remained largely unleveraged by these systems.
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