Multi-Touch surface based on RGBD camera

Klemen Istenič, Luka Čehovin, Daniel Skočaj


The popularity of interactive surfaces is increasing because of their natural and intuitive usage. Adding 3D multi-point interaction capabilities to an arbitrary surface creates numerous additional possibilities in fields ranging from marketing to medicine. Interactive tables are nowadays present in numerous museums, schools and companies. With the advent of low-cost RGBD cameras, thee-dimensional surfaces are slowly emerging as well, attracting even more attention. This paper presents an affordable system for 3D human-computer interaction using a RGBD camera that is capable of detecting and tracking user’s fingertips in 3D space. The system is evaluated in terms of accuracy, response time, CPU usage, and user experience. The results of the evaluation show that such low-cost systems are already a viable alternative to other multi-touch technologies and also present interesting new ways of interaction with a surface-based interfaces.

[Paper] [Presentation]

Evaluation of input devices for view manipulation in 3D space

Few weeks ago there Peter Škrlj has completed his Bachelor Thesis titled: Evaluation of input devices for view manipulation in 3D space.

The thesis is in Slovenian language and is accessible here. Below you can find a short abstract.


As part of the thesis we have developed applications for the extension of the vein display with support for two additional navigation devices (3D Connexion Space Navigator Mouse and hand gesture based navigation device Leap Motion) which represented an extension of possible input devices besides the keyboard and a mouse to manipulate the view of 3D model of neck veins. In addition to the implementation of support for the device in the application we carried out a user study in which we assessed the usability and ease of use of devices in the application. The results consisted from data we collected from the users’ experience while they solved various manipulation tasks and the answers received from questionnaires SUS (System Usability Scale) which constitute one of the tools with which we can assess interfaces. Analysis of the results confirmed that the 3D mouse is more useful in such an environment and also highlighted some shortcomings of the hands free navigation device Leap Motion.

HCI-IS 2013

We are glad to announce that we have successfully finished the second event organised by the community, the scientific conference on Human Computer Interaction in Information Society. The conference took place on 9th of October 2013 at Jožef Stefan Institute.

There were eight contributions presented at the conference in two sections:

  • Kinect Kiosk user experience evaluation
    Ciril Bohak, Matija Marolt
  • 3D navigation natural interaction with movement sensor technology
    Yin Ling
  • Connecting physical objects with software. Technology enhanced playing with blocks to foster learning
    Daniel Joerg, Martina Lucht, Tobias Schwandt
  • Implicit photowork based on eye-gaze data
    Bojan Blažica
  • A website usability testing tool
    Franc Novak, Denis Špelič, Borut Žalik
  • Wireless medical device audio alarm
    Marko Pavlin
  • How to provide health-related information by mobile computing?
    Barbara Koroušić Seljak
  • Toward improved emergency call service: a usability test case study
    Miha Ristič, Franc Novak



Bootstrapping HCI-SI

With this blog we are starting a bootstrapping procedure of Slovenian HCI community. Our goal is to connect researchers from academic and industrial backgrounds and form a community.

First step is setting-up this blog as meaning of exchange and publication of activities in community.

Second step is organisation of HCI-SEE Workshop as part of SouthCHI conference which takes place in Maribor in mid 2013.