Baanto ShadowSense Technology Enables Virtual Graffiti Drawings on Multitouch Displays
The system is provided as a frame with several sensors (4 typically) that you can connect via USB to your computer. It is an USB HID device, does not need drivers and support Windows XP/7, Linux and Android.
This proprietary technology has the following key features:
- Traceability of multiple points or objects simultaneously (up to 5 points)
- Up to 10,000 fps.
- 16 MPixel resolution of shadow position.
- Simple algorithm that can be implement in 8-bit MCU.
- Low power draw.
- Less than $10 US per sensor. A typical configuration uses 4 sensors and plenty of small LED emitters as shown the illustration.
- Up to 1mm resolution of object position.
- No optical lenses are required
The resolution is not quite at the level of the Leap Motion (0.01 millimeter), but you can still do pretty cool things with the technology such as drawing graffiti with amazing accuracy and apparent ease on a display wall.
It doubt it could solve illegal graffiti art, but there are plenty of applications made possible with this technology such as digital whiteboard, 3D gaming, signature verification and rehabilitation. I discovered the technology via Anders DX which uses ShadowSense technology with some of their multi-touch screens aimed at digital signage applications.
You can find more information, including white papers, on Baanto ShadowSense page.