Abstract: Abstract: A visual simulation system for flight simulation often uses multiple projectors to simultaneously project a surface to obtain a wider range of viewing angles. When the projector is tilted to the screen or the projection screen is a curved surface, the image is geometrically distorted. Aiming at this problem, this paper proposes a geometric correction method for the dome projection system. Taking a three-channel display system as an example, the present study describes the theoretical principle and correction process of the method in detail. The example results show that after geometric correction, each projection image has no geometric distortion, and the geometrical content of the channel transition is completely consistent. The method is a pure software method, which is small in cost and simple in operation, and can be adapted to different projection scenarios.

Key words: Keywords: sphere, geometry correction, flight simulator, multiple projections, OpenGL