Real binoculars with virtual functions for mixed environments

Though often desirable, the integration of real and virtual elements in mixed reality environments can be difficult. We propose a number of techniques to facilitate scene exploration and object selection by giving users real instruments as props while implementing their functionality in a virtual part of the environment. Specifically, we present a family of tools built upon the idea of using real binoculars for viewing virtual content. This approach matches user expectations with the tool's capabilities enhancing the sense of presence and increasing the depth of interaction between the real and virtual components of the scene. We also discuss possible applications of these tools and the results of our user study. This paper is an extended version of earlier work presented at the 4th International Workshop on the Tangible Space Initiative[5].