航拍影像模拟的生成算法

为了在战场模拟和教育训练等情景中有效地使用航拍影像,减少实地拍摄的成本,提出了航拍影像模拟的生成算法。航拍影像模拟主要采用可视化技术对大地景象和动态云图进行再现。改进随机中点位移法生成全闭合的2个基本数据场;运用锐化方法将第1个数据场生成边缘相对清晰、分布相对集中的云场;将云场进行平移和变形,得到受风场影响的动态变化的云图;将第2个数据场映射生成连续的大地;最终进行云图和大地叠加显示,实现航拍影像的模拟。仿真模拟算法在虚拟战场环境模拟软件中进行了应用,模拟仿真效果满足了系统的需要。

Algorithm of simulating aerial images

To use the aerial images more efficiently in scenes of battlefield and education, and reduce the cost of real aerial images, algorithms were put forward that applied simulating techniques to creating the aerial images. Simulating aerial images mainly uses visualization techniques to reappear the earth scenes and dynamic cloudscape. Firstly, two absolutely closed data field were generated by improving the random midpoint displacement method. Secondly, a cloud field with a relatively sharp edges and concentrated distribution was generate by using sharpening method to deal with the first data field. Then the cloud field was translated and deformed, and a dynamic changed cloudscape affected by the wind field acquired. The continuous earth image was generated by mapping the second data field. Finally, the simulation of aerial images was realized using the principle of superposition display of the cloudscape and the earth image. The simulation algorithm has been applied on the software of virtual battlefield environment simulation. The result of the simulation can meet the practical requirement of the simulation system.