基于数字高程模型的森林火灾远程视频同步跟踪算法

根据手电筒光束照射障碍物形成光圈的过程和摄像机的参数建立摄像机视域的数学模型，利用Janus算法．对视域中心点坐标进行求解；利用圆的正多边形逼近算法，对过视域中心点且垂直于中心视线的平面的边界点坐标进行求解；再次利用Janus算法，提取摄像机视域在数字高程模型上的对应边界点；最后，以浙江省临安市三桥乡的数字高程模型数据为基础，编程实现此算法，并旋转摄像机进行同步跟踪试验。结果表明：该算法能够实现摄像机视域与数字高程模型的同步跟踪显示，从而实现了视频监控技术与地理信息系统技术的信息联动。图6参14

Study on synchronization tracking algorithm in remote video monitoring of forest fires based on DEM

The research established the mathematical model of camera monitoring region on the basis of the camera parameters and formation process of the flashlight aperture. First, the coordinates of the visualization domain center point were solved by the Janus algorithm using the camera parameters. And the regular do decagon generating a circle algorithm was used to calculate the boundary points of the plane containing the vi sualization domain center point and perpendiculars to the center sight line. Then the boundary points corre- sponding to the camera monitoring region was extracted by Janus algorithm again. Finally, the algorithm was implemented on the basis of DEM of Three Bridge Town in Lin＇an and the synchronization tracking tests showed that this algorithm could display the camera monitoring region synchronously on the DEM and achieve the information linkage between the video surveillance and GIS technology. Ch, 6 fig. 14 ref.]