For realizing natural interaction with a virtual object, bare hand interaction reduces the discomfort caused by devices mounted on the user's hand. There have been some studies on such bare hand interaction, however in these studies the shape of the virtual object is assumed to be simple or the user touches a physical object during the bare hand interaction[Ban et al. 2014]. In our previous study, we have developed an AR system that allows the user to grasp a spherical virtual object with a bare hand[Suzuki et al. 2014]. This study extends the previous work. We focus on manipulation of a virtual object in various shapes with a bare hand. The manipulation includes grasping, rotating, translating and releasing the virtual object. The shapes of the virtual object are not only a sphere but also a cube, a cuboid, a duck, a cup and a chess pawn. We compare the manipulation of the virtual object with the manipulation of the real physical object in the same shape. Subjective evaluation results show that with our extended AR system, grasping, rotating and translating the virtual objects except a narrow shape are natural or slightly unnatural compared with those of the real physical objects.
['Mie Sato', 'Daiki Ebihara', 'Sota Suzuki', 'Sho Kato']
An AR system on manipulating a virtual object with a bare hand