1. SideBySide: Ad-Hoc Multi-User Interaction with Handheld Projectors Karl D.D. Willis, Ivan Poupyrev, Scott E. Hudson, and Moshe Mahler. 2011. SideBySide: ad-hoc multi-user interaction with handheld projectors. In Proceedings of the 24th annual ACM symposium on User interface software and technology (UIST '11). ACM, New York, NY, USA, 431-440. DOI=10.1145/2047196.2047254 http://doi.acm.org/10.1145/2047196.2047254

2. Overview Authors Motivation Vision Paper Summary – What they Made – How it Works – Example Applications Similar Works

3. The Crew Karl WillisIvan Poupyrev Scott Hudson Moshe Mahler

4. Motivation Utsushi-e Performances

5. The Goal “Allow users to dynamically interact with each other in shared interactive spaces.”

6. What they Built

7. That’s It?!? The IR LEDs Project QR Codes The Visible Light LED Projects the Image

8. That’s It?!? The IR LEDs Project QR Codes The Visible Light LED Projects the Image

9. That’s It?!? QR Codes Can Also Be Used to Communicate Information/Events

10. Example Applications

11. Similar Works SixthSense (2009): Uses the project to overlay images on top of real world objects.

12. Similar Works MotionBeam (2011): Uses a projector as a way to control a virtual character.

13. Similar Works HideOut (2013): Uses a projector as a way to control a virtual character.

14. Not Handheld, but Disney, You Amaze Me

15. Overview Authors Motivation Vision Paper Summary – What they Made – How it Works – Example Applications Similar Works

16. Discussion Questions The authors present a large number of sample applications that utilize their system. Out of the three broad categories (Mobile Content Exchange, Education, Games), which ones stood out to you? In the paper, the authors state that the technologies used in SideBySide are commercially available, and can be assembled in a cost-efficient manner. They also say that the technology could be feasibly deployed in around 2-4 years ago. Given that the paper came out in 2011, what do you think is the reason why this technology hasn't appeared to gain significant traction in the handheld market?