Week 7 Summary
Paper Presentation & Summary for Week 7 :
Here are the links to my paper:
1) Main Paper –
Scape: supporting stereoscopic collaboration in augmented and projective environments – Hong Hua, Leonard Brown and Chunyu Gao
Here are the two related papers. The first one is relatively old while the second one is more recent compared to the main paper.
2) Additional Papers –
(i) The Responsive Workbench – Wolfgang Krueger and Bernd Froehlich. I chose one of Scape’s references because I could closely relate to what Scape tries to achieve and how it drew upon The Responsive Workbench. One of the important similarities between the two papers is collaboration to achieve tasks like design etc.
(ii) Mirage Table: Freehand Interaction on a Projected Augmented Reality Tabletop – Hrvoje Benko, Ricardo Jota and Andrew D. Wilson.
I chose the Mirage Table paper as my second paper, which is a more recent Microsoft Research paper which caught my attention. Remote collaboration in 3D in the same 3D task space is an important aspect of this system. It basically achieves one of modes of collaboration which the Scape paper was aiming to achieve in the future.
Discussion Questions:
Q1) Can teleconferencing experience that allows shared work space lead to new kind of social networking. (Say an environment where you and your friends meet/collaborate virtually)
Q2) How accurate is this technology? Can it only be used for demo purposes.
Q3) If interactive remote collaboration in which both local and remote users symmetrically interact with the augmented simulation becomes true, what areas will it impact the most. (I think long distance learning by demo will be one such areas). Can you think of more beneficial uses.
Q4) What kind of novel application can you think of with SCAPE?
Q5) In responsive workbench there was dataglove with sensor and lately there has been Mirage Table with no dataglove. Is the lack of realistic grasping a major problem in making this technology believable?
A practical Multi-viewer Tabletop Autostereoscopic Display.
Gu Ye, Andrei State Hnery Fuchs
This paper describes a multi-user autostereoscopic tabletop display and its associated real-time rendering methods. The best part of autostereoscopic display is that it allows users to have their own stereo perception independent of others without having to wear any kind of special glasses. Only constraint being that the eyes of the viewer needs to be tracked accurately. There are currently three broad classes for autostereo display. They are holographic, volumetric and parallax-based. This system is based on the “Random Hole Display” design allowing users to see a different subset of the display’s native pixels through the random-hole screen somewhere in front of the screen. The Random Hole Design concept replaces the thin parallel slits with dense padding of tiny randomly generated placed holes; this allows each user to see a different perspective of the tabletop.
The major contributions of their work included hardware-accelerated rendering algorithm for minimizing noise and optimizing quality. It was the first practical multi-viewer full-color autostereo display, supporting tabletop application using a novel calibration method integrated with the viewer tracking system.
However, there are certain drawbacks too. Firstly, the image quality degrades with addition of viewers. Also, it’s too expensive to be used for commercial applications. The less expensive ones don’t provide the required level of performance. There were a few applications made to test the system of them being an interactive application with finger tracking capability. In this, the furniture was moved around and positioned as required.
One question which I would like to ask the author would be what kind of bandwidth requirements these systems would require and what is the frame update rate, so that with better understanding affordable technologies could be developed for commercial applications. I find the lack of any special glasses to be worn quite fascinating but the systems are still not there yet in terms of technology sophistication for practical use.
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