Permulin

Abstract

We contribute Permulin, an integrated set of interaction and visualization techniques for multi-view tabletops to support co-located collaboration across a wide variety of collaborative coupling styles. These techniques (1) provide support both for group work and for individual work, as well as for the transitions in-between, (2) contribute sharing and peeking techniques to support mutual awareness and group coordination during phases of individual work, (3) reduce interference during group work on a group view, and (4) directly integrate with conventional multi-touch input. We illustrate our techniques in a proof-of-concept implementation with the two example applications of map navigation and photo collages. Results from two user studies demonstrate that Permulin supports fluent transitions between individual and group work and exhibits unique awareness properties that allow participants to be highly aware of each other during tightly coupled collaboration, while being able to unobtrusively perform individual work during loosely coupled collaboration.

Designing Physical-Digital Workspaces to Support Globally Collaborative Work

“…It can, however, be observed when an individual searches his or her own personal documents while using a shared surface. Lissermann, Huber, Schmitz, Steimle, & Mühlhäuser (2014) demonstrate another example of such a workspace by pairing a multi-user (collective public) table top over which a private space is projected using glasses (individual private).…”

Group vs Individual

“…In the years since that work was published, work at CHI has addressed how technology can support mixed-focus collaboration, in which users will transition between individual and group work. Research has sought to identify [34] and support various styles of collaboration [29], and show how designing for these tensions can improve the outcomes of group work [7].…”

PolarTrack

“…Further applications include single display privacyware [27], in which specific regions of a single screen become visible or invisible to different users by either using frame interleaving (in combination with synchronized shutter glasses) or, alternatively, orthogonal polarization. Lissermann et al's Permulin uses the former and displays two different user-specific images on the same physical 3D screen for improving tabletop collaboration [18]. Karnik et al's PiVOT uses the latter and combines polarized and unpolarized light sources with modified liquid crystal (LC) displays to create personalized view overlays for tabletops [11].…”