Lumitrack - accurate gesture sensor system

Gesture sensor systems such as the Wii and Kinect have changed the way we play games and opened up many applications in many areas of technology such as space, navigation and robots.

>>>Video: Lumitrack sensor system

However, many users still complain about the big delay between the actual motion and the corresponding character response in the game or the navigation element on the screen. For this reason, a team of creators developed a gesture sensor system called Lumitrack with lower latency, higher accuracy and possibly cheaper to commercialize than systems. available.

Lumitrack was developed by researchers from Carnegie Mellon University and Disney Research Institute in Pittsburgh. The system includes projectors that emit similar bar code patterns (barcode) and a range of sensors to identify these patterns.

In the usual setting, a projector placed above the computer screen emits a rectangle known as the m-sequence "m" sequence to the user and around them. The string recreates the computer screen and it includes many intentionally arranged vertical lines with many thin thicknesses. As a rule, a combination of 7 lines next to each other will not repeat anywhere in the pattern.

Users will hold a control device equipped with optical sensors. By identifying combinations of 7 lines close to each other, the sensors can determine the corresponding position on the screen, at least horizontally.

To determine the vertical position, a second projector will project another m string over the previous series with horizontal lines. Again, the non-repeat rule of the 7-line combination is applied. The sensors will use the second m string to set the corresponding position vertically on the screen.

Based on information obtained from 2 m series, another sensor placed on the handheld controller will correctly control the movement on the screen, such as the heart of a shooting game.

Alternatively, the handheld controller can integrate projectors and sensors that can be placed on the screen, as opposed to the above setting. Whatever the setting, the system still achieves near millimeter accuracy and the response time is only about 2.5ms. Although the current system uses visible light, the development team says the system is still compatible with unseen light such as ultraviolet light.

Carnegie Mellon University said sensors only need very little energy to operate and are cheap to mass-produce. In addition, they can also be integrated into smartphones. The invention of Carnegie Mellon and the Disney Research Institute has just been published on ChrisHarrison.net.