Real-Time Correction Method for Non-follow-Up Dome-Screen Projector System

The purpose of this paper is to realize the real time correction of geometric distortion of the non-follow-up dome-screen used in the motion simulator. To achieve this goal, the change of the trainer's observation area and the observing position that deviate from eye point are analyzed first, when the relative movement of the dome-screen and platform occurs. Then, based on the analysis above, we use the asymmetric view frustum method to make the image zone always in the center of occupant's view. The geometric distortion caused by the deviation the relative movement between the screen and platform is discussed later. Finally, combined with the motion of the visual system, an adaptive visual adjustment method is proposed to reduce the geometric distortion as well as realize the real time correction. The simulation is built on the Matlab. Results indicate that the geometric distortion is reduced about 70% after correction, the distortion error precision is within 0.2° in the zone about 10° around the line of sight. Also the error of the view edge is decreased partly. It is concluded that the method can realize real-time distortion correction only a few transforms and have an excellent effect for non-follow-up dome screen when the relative movement of platform occurs, which satisfies the requirements of the motion simulator.