Poster: Manipulating virtual objects in hand-held augmented reality using stored snapshots

We describe a set of interaction techniques that allow a user of a magic-lens style augmented reality application to take snapshots of an augmented scene and revisit them virtually for interaction at a later time. By storing a still image of the background along with the camera pose, this approach allows augmentations to remain dynamic and interactive. This makes it possible for the user to manipulate virtual objects from the vantage points of different locations without the overhead of physically traveling between those locations. Preliminary results from a user study show that participants were able to complete an alignment task significantly faster and as accurately when using snapshots as opposed to physical travel. Qualitative questionnaire answers showed that participants preferred using snapshots over walking and found it less demanding.