摘要
以智慧森林中数字视频监控系统为平台,利用摄像机标定技术和空间立体分析,对森林火灾进行自动定位算法研究。运用穷举搜索法和二分法,借助DEM模型,判断地形剖面上的火点位置。根据林区地形变化的特点,运用摄像机镜头光轴在空间的平移方法,在平面像素坐标与立体空间坐标之间建立映射,简化算法,提高计算精度。实际应用表明,该算法在经过40多组数据的测试,计算的火点位置直线距离误差在95 m范围内,旋转角和俯仰角的精度得到了提高。
With the digital video monitoring system in smart forest, we studied the automatic positioning algorithm of forest fire by using camera calibration technique and spatial stereo analysis. Using the method of exhaustive search and dichotomy, the location of the fire point on the terrain profile was determined by DEM model. According to the characteristics of the forest terrain changes, using translation methods of the camera optical axis in the space, the mapping relationship between the plane pixel coordinates and the spatial coordinates is established. We simplified the algorithm and improved the calculation accuracy. The actual application shows that the localization algorithm can meet the automatic positioning of forest fire point, and is an important part of intelligent forest monitoring system.
作者
李高和
张艳莉
Li Gaohe;Zhang Yanli(Xi＇an Shiyou University,Xi＇an 710065,P.R.China;Shaanxi Normal Universit)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2018年第7期102-105,共4页
Journal of Northeast Forestry University
基金
国家自然科学基金项目(Z13130)
关键词
森林火灾
自动定位
数字高程模型
摄像机标定
穷举搜索法
二分法
Forest fire
Automatic positioning
Digital elevation model
Camera calibration
Exhaustive search method
Dichotomy
