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CHINZ Tables of Contents: 05060708091011121315

Proceedings of CHINZ'13, the ACM SIGCHI New Zealand Chapter's International Conference on Computer-Human Interaction

Fullname:Proceedings of the 14th International Conference of the NZ Chapter of the ACM's Special Interest Group on Human-Computer Interaction
Editors:Mark Billinghurst; Stuart Marshall
Location:Christchurch, New Zealand
Dates:2013-Nov-15 to 2013-Nov-16
Publisher:ACM
Standard No:ISBN: 978-1-4503-2640-7; ACM DL: Table of Contents; hcibib: CHINZ13
Papers:12
Links:Conference Website
Tag Clouds for Software and Information Visualisation BIBAFull-Text 1
  Jessica Emerson; Neville Churcher; Andy Cockburn
We have extended the tag cloud metaphor to allow it to be applied to information and software visualisation. A number of issues, such as wide variation in tag length, have been addressed. We have developed a tool, TAGGLE, which implements our approach. In this paper, we present our visualisation technique and discuss the heuristic evaluation and report preliminary results from user trials employed to evaluate the approach and TAGGLE itself.
Adaptive Interpupillary Distance Adjustment for Stereoscopic 3D Visualization BIBAFull-Text 2
  Hyungon Kim; Gun Lee; Mark Billinghurst
Stereoscopic visualization creates illusions of depth through disparity between the images shown to left and right eyes of the viewer. While the stereoscopic visualization is widely adopted in immersive visualization systems to improve user experience, it can also cause visual discomfort if the stereoscopic viewing parameters are not adjusted appropriately. These parameters are usually manually adjusted based on human factors and empirical knowledge of the developer or even the user. However, scenes with dynamic change in scale and configuration can lead into continuous adjustment of these parameters while viewing. In this paper, we propose a method to adjust the interpupillary distance adaptively and automatically according to the configuration of the 3D scene, so that the visualized scene can maintain sufficient stereo effect while reducing visual discomfort.
If Reality Bites, Bite Back Virtually: Simulating Perfection in Augmented Reality Tracking BIBAFull-Text 3
  James Wen; William S. Helton; Mark Billinghurst
Augmented Reality (AR) on smart phones can be used to overlay virtual tags in the real world to show points of interest that people may want to visit. However, field tests have failed to validate the belief that AR-based tools would outperform map-based tools for such pedestrian navigation tasks. Assuming this is due to inaccuracies in consumer GPS tracking used in handheld AR, we created a simulated environment that provided perfect tracking for AR and conducted experiments based on real world navigation studies. We measured time-on-task performance for guided traversals on both desktop and head-mounted display systems and found that accurate tracking did validate the superior performance of AR-based navigation tools. We also measured performance for unguided recall traversals of previously traversed paths in order to investigate into how navigation tools impact upon route memory.
A Time and Place for Preparatory Methods in Email BIBAFull-Text 4
  Nikash Singh; Martin Tomitsch; Mary Lou Maher
Despite the communication of information via Email that is meant to prepare us and make us more organised, Email is fast becoming an unmanageable source of productive information meeting unproductive ends. The Email environment, with its suite of time and task management aids, is proving too fragmentary. Effort expended in categorising and organising incoming information is not rewarded with intelligent forewarning and awareness-generation of deadlines and obligations. With preparatory methods (information organisation behaviour) declining in favour of opportunistic methods that do not facilitate recall or prioritisation, attempts to re-invigorate preparatory methods are required to encourage the continued practice of organisation in Email. To understand what is required of preparatory methods to garner interest from Email users, we conducted a user interface study that targeted the management and awareness-generation aspects of temporal (time-related) information in the Email environment. Our results indicate that users' desire to organise information is not extinguished, but a careful emphasis on assistance is necessary to once again make these preparatory methods an attractive proposition.
Hybrid Tracking using Gravity Aligned Edges BIBAFull-Text 5
  Samuel Williams; Richard Green; Mark Billinghurst
We have developed a hybrid tracking algorithm for mobile outdoor augmented reality (AR) applications. Our approach combines inertial sensors and camera video to improve global bearing calculations. Prior research in this area has focused on gravity aware feature descriptors, but we expand this to efficient full-frame vertical edge detection. We discuss our implementation and evaluate it's performance on an iPhone 5, which reveals that our approach is over 100 times faster than existing feature alignment algorithms and can improve tracking with only 2-4ms of additional processing per frame on current generation mobile phones.
Is there any Use in Stereoscopic Slide Presentations? BIBAFull-Text 6
  Julia Vendeland; Holger Regenbrecht
Stereoscopic display technologies are becoming increasingly commonplace in cinemas, homes and offices. It appears that this form of presentation, also referred to as 3D, is more and more supplementing and substituting monoscopic (2D) forms. However, there is only little evidence for the actual usefulness of stereo presentations.
   We are investigating users' preferences for stereoscopic PowerPoint-style slide presentations, in particular which presentation elements are perceived as useful.
   In an empirical within-subject study with 20 participants comparing monoscopic with stereoscopic slide presentations we found early evidence that there is only little difference in the users' preferences, that text and images are preferred to be watched monoscopically and that graphs, diagrams and 3D models might be preferred in stereo, but may confuse the viewers.
Visual Occlusion in an Augmented Reality Post-Stroke Therapy Scenario BIBAFull-Text 7
  Max Allen; Simon Hoermann; Thammathip Piumsomboon; Holger Regenbrecht
We investigate the effect that visual occlusion plays on users' perception in a prototypical augmented reality post-stroke therapy system. We implemented a reach-based therapeutic exercise using the Microsoft Kinect to enable depth sensing and correct visual occlusion of the upper-limb. Thirty participants evaluated the exercise with three different visual occlusion modes: the correct visual occlusion, a virtual-always-occludes -- to date the most commonly used mode in augmented reality -- and a mode with semi-transparent virtual objects. The analysis of their reported experience showed that correct occlusion was the most preferred mode for performing the reaching exercise, providing a more tangible and realistic interactive experience.
Massive Ontology Interface BIBAFull-Text 8
  Matt Stannett; Catherine Legg; Samuel Sarjant
This paper describes the Massive Ontology Interface (MOI), a web portal which facilitates interaction with a large ontology (over 200,000 concepts and 1.6M assertions) that is built automatically using the OpenCyc ontology as a backbone. The aim of the interface is to simplify interaction with the massive amounts of information and guide the user towards understanding the ontology's data. Using either a text or graph-based representation, users can discuss and edit the ontology. Social elements utilizing gamification techniques are included to encourage users to create and collaborate on stored knowledge as part of a web community.
   An evaluation by 30 users comparing MOI with OpenCyc's original interface showed significant improvements in user understanding of the ontology, although full testing of the interface's social elements lies in the future.
Designing a NUI Workstation for Courier Dispatcher Command and Control Task Management BIBAFull-Text 9
  Rory M. S. Clifford; Mark Billinghurst
Natural User Interface technology greatly changes the way we interact with computer systems, but does it perform as well as their traditional counterparts under pressure? By comparing a selection of user interface devices that provide a range of natural interaction systems, we explore how well the interface devices will perform in a command and control environment such as for a courier dispatcher. A Fitts' pointing experiment was used to make the comparisons and we found that a Multi-touch system performed the best in pointing and selection tasks, followed by mouse, Track-pad and lastly the Leap Motion hand tracking and gesture controller. It was noted that in order for any of the devices to operate at their optimum, then the graphical user interface and the hardware interface needs to be tightly bound together in order to optimize user task performance.
Supporting the Reader in the Wild: Identifying Design Features for a Literary Tourism Application BIBAFull-Text 10
  Sally Jo Cunningham; Annika Hinze
This paper explores the potential features and functionality of software to support 'literary tourism' -- a type of cultural tourism that focuses on real-world settings associated with fictional works and the authors' lives. We explore the research literature on literary tourism to create a set of five literary tourist personas, and to tease out potential design and functionality for applications to support these different categories of literary tourists. We then analyze a set of current websites and applications aimed at the literary tourist against the personas, as a test of the usefulness of the categories in identifying potential gaps in literary tourism support.
Using the S-PI Algorithm for Interaction in Augmented Reality BIBAFull-Text 11
  Ajune Wanis Ismail; Mark Billinghurst; Mohd Shahrizal Sunar
In this paper, we describe a new interaction approach for intuitive 3D object handling in Augmented Reality (AR). Our method transforms the AR tracking pattern into a point-based representation and then uses this to perform object interaction such as translate, rotate, and clone. This is based on a robust real-time computer vision algorithm that constructs a 6DOF camera pose relative to a handheld paddle used for input. Using a point-by-point calculation of the camera pose relative to the paddle we can overlay 3D graphics on top of the paddle or a ground plane. This allows the user to inspect virtual objects from different viewing angles in the AR interface and perform interactions with the objects. In this paper, we first review related work and then briefly describe our system architecture and tracking method. We evaluate our approach with regard to speed and accuracy, and compare it to existing marker-based AR systems. Finally, we demonstrate the robustness and usefulness of our approach in an example AR application.
Investigating Visualization of Energy Consumption BIBAFull-Text 12
  Latha Karthigaa Murugesan; Rashina Hoda; Zoran Salcic
Visualization of energy consumption patterns is expected to enforce ecologically responsible behavior. Visualization performs a vital role by assisting residential end-users to understand and manage their energy consumption in a sustainable manner. The main objective of visualizing energy consumption is to inculcate awareness among residents and to encourage energy conserving behavior. A robust design is essential to achieving an effective visualization. This article discusses the preliminary research work on identifying the design requirements for visualization followed by the future direction in this area of research.