The NUI Group, a community over over 5000 NUI professionals and enthusiasts, has published a free book describing, in detail, how to build multi-touch tables using the same technologies used to build Microsoft Surface or Jeff Han's multi-touch surface used by CNN.Even if you are not interested in building your own table the book is a wealth of information about the various kinds of optical multi-touch tables and how they work including:
- Frustrated Total Internal Reflection (FTIR)
- Rear Diffused Illumination (Rear DI)
- Laser Light Plan (LLP)
- LED-Light Plane (LED-LP)
- Diffused Surface Illumination
If you've always wanted to understand how large multi-touch tables work this is the best single source of information that I've seen other than the forums of the NUI Group itself.
In addition to learning how multi-touch tables work and how to build them you'll learn about how software systems are designed to translate touch input into gesture events and how to develop multitouch applications in Python, ActionScript 3 & Flash, and .NET/C# using software libraries built around the TUIO protocol.
This is one of the single best sources of information on multi-touch tables I've seen. A super-treasure trove of information that will only promise get better in subsequent versions. With contributions from 16 multitouch practitioners the book is only in its first "version" and I expect it will be updated fairly frequently since its electronic. If you are extremely anal about copy editing than be prepared for a few typos here and there, a small price to pay for such a wonderful book. Nice work guys!!
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