Turtledove: a tangible grain interface for image organization

Interfaces supporting bi-manual interaction offer great benefits. In recent years, a variety of multi-touch systems have even shown new possibilities for multi-finger input. However, multi-finger interactions do not always show better performance. We propose an interface consisting of a large amount of minimal tangible objects called tangible grains combined with a visual projection. The system is intended to add passive physical feedback to increase performance and improve the quality of the interface. In this paper we present the concept, the implementation and first small-scale user studies of a tangible grain interface for the organization and, especially, the sorting and tagging of images.