Research
I am currently working as a Postdoc attached to the Verdione project at the Department of Computer Science, University of Tromsø, Norway, after successfully defending my Ph.D. in Computer Science on November 6th 2009. I work with Professor Otto J. Anshus and Associate Professor John Markus Bjørndalen. In 2008 and early 2009, I spent a year visiting Professor Kai Li and Assistant Professor Olga Troyanskaya at Princeton University as a visiting graduate student. My research interests include scalable distributed systems, high-performance computing and human-computer interaction. My research environment consists of a wall-sized, high-resolution tiled display (a display wall) with lots of supporting hardware including a cluster of computers, cameras and microphones.
One of my research projects has been to build a device-free, scalable, multi-touch input system for wall-sized displays. While the system's design and implementation is documented in several papers, I have also decided to make a briefer description of the system available here. You can read about "Interaction Spaces: A camera-based system for scalable multi-touch 2D and 3D interaction on wall-sized, high-resolution displays" here.
You can read more about this system in my doctoral dissertation, which I have made available online. The dissertation is titled: "Device-Free Interaction and Cross-Platform Pixel Based Output to Display Walls" and is a 6.2 MB download.
Videos
This is a list of my videos currently on YouTube. The videos demonstrate various aspects of my research.
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The 22 Megapixel Laptop - This video demonstrates the 22 Megapixel Laptop, a system I built to utilize the high resolution of our display wall directly from my laptop. Virtual displays are created by a kernel extension running on a MacBook Pro, whose pixels are then shared using a VNC-like system with the computers driving the projectors of the display wall. You can read more on the dedicated 22 Megapixel Laptop page. |
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Navigating a 13.3 gigapixel image on a 22 megapixel display wall - This video demonstrates the Interaction Spaces system and WallScope systems. The Interaction Spaces system is used to enable touch-free navigation of a very high-resolution image of Tromsø taken by photographer Eirik Helland Urke. The WallScope system, built by Tor-Magne Stien Hagen, takes care of visualizing the image data with high performance in response to movements detected by the Interaction Spaces system. You can read more about this project on the gigapixel page. |
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Device-Free Interaction Spaces - This video demonstrates the Interaction Spaces system, which enables 3D multi-touch interaction with high-resolution, wall-sized displays. A wedge-shaped interaction space is created in front of the display wall using eight cameras. Each camera's field of view is divided into a set of slices. The position of objects are detected in 1D within each slice. The 1D position is used to triangulate the position of objects in 2D for each slice, before the 2D objects are consolidated into 3D objects.
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Three years of "M" on a display wall - This video shows the touch-free interface I have developed being used to navigate a large collection of comics.
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Hybrid vision- and sound-based interaction on display walls - This video complements the paper we published at the HCI workshop in conjunction with ICCV in 2007. It demonstrates how we can create a completely device-free interface to the display wall, while still retaining the ability to reach far-away objects.
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In the press
My work and research has appeared in the press from time to time. Here are some press appearances that I'm aware of:
- September 24. 2010: Morgendagens spåkuler. feature article in Nordlys, September 24. 2010. Print and internet (in Norwegian).
- May 2010: The MacTech Spotlight: Daniel Stødle. MacTech magazine, Volume 26, Issue 5. May 2010. Print and internet.
- March 27. 2010: Vekker oppsikt. iTromsø, March 27. 2010. Print and internet (in Norwegian).
- March 23. 2010: Verdens største multi-touch skjerm er norsk. NRKbeta, March 23. 2010 (in Norwegian).
- February 16. 2010: Forsker viser video på nett. Nordlys, February 16. 2010. Print only.
- November 13. 2009: Her er fremtidens super-skjerm - Norsk teknologi i Europa-toppen. VG, Norway's largest daily newspaper, publishes an article about my research (in Norwegian). The article appears both online and in the November 13. 2009 print edition.
- November 9. 2009: Er dette fremtidens tavle? NRK does a write-up on the research that culminated in my successful Ph.D. defense (in Norwegian).
- December 2. 2008: Mac Geek Gab Podcast. The guys over at The Mac Observer discuss my Ping Tunnel application on their weekly podcast.
- January 24. 2008: The best way to navigate your comic collection. Technabob features my YouTube-video, documenting how I use the multi-touch interface I have developed to navigate three years of the Norwegian comic M.
- August 5. 2007: Bright ideas - Notes from the Emerging Display Technology conference. Peter Glaskowsky at cnet mentions my work on the 22 megapixel laptop, after its presentation at EDT 2007.
- December 21. 2006: Screen Sieve boosts accessibility in OS X. Ars Technica features my Screen Sieve application in their Infinite Loop journal.
Publications
The following is a list of my publications, in reverse chronological order, with PDFs available for each paper. You can also get the BibTex citations for the papers below here.
- Tech-note: Device-Free Interaction Spaces, Daniel Stødle, Olga Troyanskaya, Kai Li and Otto J. Anshus. In Proceedings of IEEE International Symposium on 3D User Interfaces 2009. Lafayette, Louisiana, USA, March 14.-15. 2009.
- Blurring the line between real and digital: Pinning objects to wall-sized displays, Daniel Stødle and Otto J. Anshus. In Proceedings of the 2008 workshop on Immersive projection technologies/Emerging display technologiges, IPT/EDT 2008. Los Angeles, California, USA, August 2008. A video is also available.
- De-Centralizing the VNC Model for Improved Performance on Wall-Sized, High-Resolution Tiled Displays, Daniel Stødle, John Markus Bjørndalen and Otto J. Anshus. In Proceedings of Norsk Informatikkonferanse, NIK 2007, pages 53-64. Oslo, Norway, November 2007.
- A System for Hybrid Vision- and Sound-Based Interaction with Distal and Proximal Targets on Wall-Sized, High-Resolution Tiled Displays, Daniel Stødle, John Markus Bjørndalen and Otto J. Anshus. In Proceedings of IEEE International Workshop on Human Computer Interaction, in conjunction with ICCV 2007. Springer Lecture Notes in Computer Science volume 4796. Rio de Janeiro, Brasil, October 2007.
- Lessons Learned using a Camera Cluster to Detect and Locate Objects, Daniel Stødle, Phuong Hoai Ha, John Markus Bjørndalen and Otto J. Anshus. In proceedings of Parallel Computing 2007, Aachen, Germany, September 2007. IOS Press, February 2008.
- The 22 Megapixel Laptop, Daniel Stødle, John Markus Bjørndalen and Otto J. Anshus. In Proceedings of the 2007 workshop on Emerging displays technologies: images and beyond: the future of displays and interacton. San Diego, California, USA, August 2007. A video is also available.
- Gesture-Based, Touch-Free Multi-User Gaming on Wall-Sized, High-Resolution Tiled Displays, Daniel Stødle, Tor-Magne Stien Hagen, John Markus Bjørndalen and Otto J. Anshus. In Proceedings of the 4th International Symposium on Pervasive Gaming Applications, PerGames 2007. Salzburg, Austria, June 2007.
- Support for Collaboration, Visualization and Monitoring of Parallel Applications Using Shared Windows, Daniel Stødle, John Markus Bjørndalen and Otto J. Anshus. In Applied Parallel Computing. State of the Art in Scientific Computing, pages 228-238. Springer Lecture Notes in Computer Science volume 4699. Umeå, Sweden, June 2006.
- The Ancient Art of Tunneling, Rediscovered, Daniel Stødle. In 2600 - The Hacker Quarterly, Autumn 2005 issue. Text version available here. This article is about Ping Tunnel, which is also available online.
- Collaborative sharing of windows between Mac OS X, the X Window System and Windows, Daniel Stødle, John Markus Bjørndalen and Otto J. Anshus. In Proceedings of Norsk Informatikkonferanse, NIK 2004. Stavanger, Norway, November 2004.
Feel free to have a look at my Ph.D. dissertation, Master thesis or term paper on window sharing as well.
Other publications and posters
- System Support for Collaborative Genomics Visualizations,
Lars Ailo Bongo, Daniel Stødle, Grant Wallace, Tore Larsen, Kai Li and
Olga Troyanskaya. Poster at the 16th International Conference on Intelligent Systems for Molecular Biology, 19.-23. July 2008, Toronto, Canada.
- Liberating the desktop, Tor-Magne Stien Hagen, Espen Skjelnes Johnsen, Daniel Stødle, John Markus Bjørndalen and Otto Anshus. In Proceedings of the First International Conference on Advances in Computer-Human Interaction, ACHI 2008, pages 89-94.
- Hybrid Vision- and Sound-Based Interaction,
Daniel Stødle, John Markus Bjørndalen and Otto Anshus. Poster presented at the VERDIKT conference, Trondheim, Norway 29.-30. October 2007. Best poster award.
Reviewer activities
- IEEE Symposium on 3D User Interfaces (3DUI) 2009
- Norsk Informatikkonferanse (NIK) 2009
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