Dynamic Simulation of Noise in 3D Infrared Scene Simulation

Simulation of IR detector noise is a difficult part in engineering development of 3D dynamic IR scene simulation. A technology of dynamically generating noise of IR detector is provided in this artical. First, by computing and analyzing the images sequence of IR detector, the random gauss noise, salt noise and heterogeneity noise is picked up. In scene simulation developed by OSG, a noise “screen” is attached to the view of the simulation scene by technology of refer to texture(RTT), and the image of the heterogeneity noise is made as the RTT texture. To realize the dynamic effect, the random gauss noise is generated and rendered by shader base on GPU. The salt noise is directly rendered according to the sign of blind pixels in RTT texture. The experiment shows that the noise simulated by technology in this article is lifelike, and the system cost of the technology is little. The method in this paper provides a practical engineering train of thought for development of dynamic 3D IR scene.