a surfaceless pen-based interface
Freehand drawing on a computer screen allows users to provide input through a natural mode of human interaction. With this freedom of expression, however, there exists a paradoxical limitation: the user is bound through the existing interface to the fixed drawing surface. In this work, we overcome this limitation by presenting a surfaceless pen-based interface with an application in the field of sketch recognition. A pilot study was conducted to examine the usability of the surfaceless pen-based interface. Results indicated that learning to use the device is relatively straightforward, but that interaction difficulty increases in a directly proportionally manner with drawing complexity.
surfaceless user interface pen-based technology