Study Of Human-computer Interaction Base On Sector Sensor

With the rapid development of electronic products, users have not satisfied with a small size touch screen, and they need an oversize touch screen. The large size touch screen of the traditional has many limitations:expensive, not easy to handle, and so on.This paper presents a virtual reality game model which is based on the real-time rendering tool named Ventuz and Infrared laser sector sensor. As a new type of presentation, Ventuz has been very popular and applied in many important activities. Fan sensor not only can work normally in a complex environment but also be installed and deployed easily. It has excellent properties of fast scanning speed, wide range, long distance. The layout of sector sensor determines a multi-touch screen other hanging touch screen, which means it acts in a formal speech or in an interactive game entertainment. This technology not only adds multi touch function for oversize common displays, but also promotes the development of the virtual reality game technology.In this paper, we have studied the application of sector sensor, the principle of sector sensor, the acquisition of touch points, the analysis of touch points, gesture recognition, the stability of touch points, coordinate conversion. The paper focuses on the analysis of the stability of touch points. A kind of improved algorithm based on clipping and filtering algorithm is proposed. The main contents and innovations are as follows:1. The sector sensor provides529points each time. By the analysis of these points, we extract the internal interaction objects’contour in the projection area and locate them, thus tracking the interactive objects, sending commands.2. The position of the touch point keep changing because of much noise. Therefore, in order to achieve the accurate location of touch points, we need to remove the noise in the data to make points stabilized. There are many kinds of filtering algorithm for data points, this paper uses the improved limiting filtering algorithm. This improved limiting filtering algorithm is a kind of combination of the limiting filtering algorithm and the real application environment. It is very suitable for experiments in this paper.3. Because many shapes of projection are irregular graphics and the commonly used screen is a rectangular screen, so we need coordinate conversion algorithms. This paper presents a kind of coordinate conversion algorithm for transforming irregular quadrilateral to regular rectangular.4. In this paper, we realizes a method of extending a common display to a touch screen. Not only an ordinary display can be extended to a touch screen, a projection screen can also be extended to a touch screen. The touch screen has a large size and can be deployed fast as well as can work in harsh environments.5. This paper makes a further development of virtual reality games and realizes the multi-person interactive of virtual reality games with a large screen.