This multi-touch table I built as a research platform is based on a diffused illumination approach:
- 91x57cm surface (107cm diagonal, 16:10 aspect ratio)
- Toshiba TDP‐EW25 projector (1280x800px)
- Point Grey Firefly MV camera (640x480px, 60fps) with wide-angle lense
- Infrared illumination (850nm)
- Bosch Rexroth aluminium frame
UPDATE I: I am now using a diffused surface illumination (DSI) setup. The table’s basic design did not change. Only the actual surface was replaced by an EndLighten acrylic sheet with a rear-projection acrylic sheet on top. An IR LED ribbon around the EndLighten sheet is now responsible for illumination, resulting in a more uniform light distribution and easier setup.
UPDATE III: I build a portable FTIR table for travelling.
A detailed description of this setup including further pictures, engineering drawings, and parts lists is available as technical report. The guys at AmiLab (Universidad Autónoma de Madrid) built their table (additional pictures) using these plans as guide; also check out their Flash Library for Interpreting Natural Gestures.
Videos of Setup
- Schmidt, D.
Design and realization of an interactive multi-touch table
Technical Report, 2009, Lancaster University (unpublished)