- freely available
ISPRS Int. J. Geo-Inf. 2015, 4(2), 493-514; https://doi.org/10.3390/ijgi4020493
1. Motivation and Background
- An approach for an assisted presentation of ad hoc provided contents on multiple displays; this computes and updates views and view arrangements.
- An enhanced undo/redo mechanism for an assisted interaction that records and structures the discussions and, thereby, allows switching back and forth between different views with regard to changing topics of interest; this distinguishes three different aspects—users, displays and objects; in this way, it also supports selective take back and rebuilding.
2. Background and Related Work
2.2. Application Scenario: Climate Impact Panel Discussion
3. Assisted Presentation
3.1. Gathering and Linking of Contents
3.2. Layout and Display
- The spatial proximity quality Qs is based on the spatial links Ei of the current layer. The quality is high if positions pv1 and pv2 of all connected views v1, v2 are close to each other.
- The temporal quality Qt considers a subset Ep of temporal links Et. Ep consists of links that connect the views of the currently shown layer Vi to the views of the previously shown layer Vi−1.
- The display quality Qd quantifies the visibility of each view. For each display, we assume a visibility factor d(v) that rates how well users can see views on this screen. This factor is based on display size, display position in the room and viewing direction of the audience. For further information, we refer to . We assume that with increasing view size sv, views are likely more visible. In case of restricted display space, views with higher relevance values f(v) should get more space.
4. Assisted Discussions
4.1. Global and Selective Undo/Redo
4.2. Visualization of Activities
5. Implementation and Use Case
- User component:This has two parts: (i) a display; and (ii) a personal editor component.
- – The display component realizes the access to the displays in a multi-display environment. An instance of this software runs on all personal devices that are connected to output devices, like projectors or large display walls. Hence, views from the connected devices can be represented on the displays of the environment.
- – The personal editor component provides the user interface, as described in Section 3. If an instance of this software is installed on a personal device, the user can contribute to the assisted presentation and discussion.
5.2. Use Case
Appendix: Views of the Use Case
Conflicts of Interest
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