A Virtual Reality System Using View-Dependent Stereoscopic Rendering

Abstract

In this research, we suggest and implement a virtual reality system which dynamically generates the 3D stereoscopic content based on the viewing direction of the user towards a 3D screen. We propose a new approach for computing projection parameters used in OpenGL. The well-known stereoscopic rendering technique, which is called off-axis, is replaced by proposed technique that involves the changes of camera position into the process of constructing two viewing frustums for typical 3D rendering. We also introduce an approach to estimate viewer's face position in the physical screen space using inverse intrinsic matrix of digital webcam known through calibration process. Then, we extract and assign the eyes positions to virtual stereo camera positions in rendering pipeline. With the system, the real 3D perspective is achieved by using only inexpensive devices, and rendered content remains as a real physical scene with immersive dimension.