Toe input with mobile projector and depth camera

With the miniaturization of mobile projectors, we can provide a larger projection surface for information browsing, despite the small size of the projection devices. Moreover, the opportunities for using location-based information services both indoors and outdoors increase. We can obtain the necessary information via the small LCDs of handheld devices, thanks to the prevalence of cell phones and GPS technology. However, these mobile terminal devices restrict the use of one hand and demand that the user keeps a close watch on the small display. It is necessary to take the devices out of a pocket or bag. To solve these problems, many researchers have focused on wearable projection systems. These systems allow for the provision of hands-free viewing via large projected screens and eliminate the need to take out and hold devices. In this paper, we propose a “Toe Input” method, which can realize haptic interaction, direct manipulation, and floor projection in wearable projection systems with a slightly larger projection surface. We evaluate the system in terms of accuracy, required time, comfort, and area suitable for input.