RENCI Vis Group Multi-Touch Blog

Developing multitouch hardware and applications for research and experimentation.

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Weekly Issue: Multi-Touch

Experiments with EndLighten and IR LED Edge-View Ribbon

March 20, 2009 (17:40) | Multi-Touch | No comments

We’ve been experimenting with alternatives to Direct Illumination (DI) because of the challenges we’ve been having with achieving a uniform illumination. We’ve turned our attention to Diffused Surface Illumination (DSI) which uses a diffuse acylic (in this case Cyro Acrylite EndLighten) to distribute the IR evenly across the surface. For the IR, we’re experimenting with [...]

Video from Emerging Issues Forum 2009

February 12, 2009 (11:04) | Multi-Touch | No comments


RENCI Multi-Touch Table at Emerging Issues Forum

February 9, 2009 (15:19) | Multi-Touch | No comments

The RENCI Multi-Touch Table was featured at the NC Emerging Issues Forum at the Raleigh Convention Center Feb. 9-10, 2009.

Latest multi-touch video

February 4, 2009 (14:31) | Multi-Touch | 2 comments

Here’s the latest video of running several different applications developed by RENCI for our Multi-Touch Table. You can view this video in HD by going to YouTube.

RENCI @ SC08 Video

December 12, 2008 (12:23) | Multi-Touch | 1 comment

This is our exhibit at Supercomputing 08 in Austin, TX on Nov 17-20 where we introduced our Multi-Touch Table.

RENCI Mulit-Touch Debut at SC08

November 17, 2008 (19:43) | Multi-Touch | 4 comments

RENCI enveils its Multi-Touch Table at Supercomputing 08 this week in Austin, TX….
As far as we can tell, we’re one of only 4 multi-touch tables (the others are University of Amsterdam, EVL, Western Scientific and, of course, Microsoft). We’ve had some good comments… One challenge has been the IR coming off the sodium lights in [...]

RENCI Multi-Touch Table Development - Part 2

November 12, 2008 (17:00) | Multi-Touch | 4 comments

Cameras
The touch detection for our direct illumination (DI) wall was originally based on the GC660 GigE camera from Prosilica. At VGA resolution (659 x 493), the GC660 can capture images up to 120 frames per second, but while the Duke wall used 8 of these to cover the image produced by 6 HD projectors, the [...]

RENCI Multi-Touch Table Development - Part 1

November 12, 2008 (16:24) | Multi-Touch | No comments

Introduction
The RENCI Multi-Touch Table is a portable multi-user, multi-touch device for user interface and visualization research.  Through an architecture of commodity-level components and custom software, this high-resolution interactive display provides an effective means for collaborators to directly interact with their data and associated external applications and peripherals. Future work will improve the table’s usability [...]

Multi-Touch Calibration Device

November 10, 2008 (13:35) | Duke Multi-Touch Wall, Multi-Touch | No comments

Aligning the detected touches with the projected screen requires the use of a calibration application built into Touchlib. Creating precise touches is made easier using the calibration tool we developed. Since there can be variations in the illumination behind (or under) the projection screen, it’s easier to turn off the illuminators and use an infra [...]

Introduction to Multi-Touch

September 1, 2008 (17:32) | Multi-Touch | 5 comments

The multi-touch interface allows a user to interact with an application or system using more than one finger at a time, as in chording and bi-manual operations. In addition to multiple touches, such sensing devices can also accommodate multiple users simultaneously, which is especially useful for larger shared-display systems such as interactive walls and tabletops.
By [...]