在远端(距离监测点500 m以上)激光强度弱并且出现激光光路干扰的实际环境中进行激光光斑中心点定位。首先通过图像预处理进行相机噪声的抑制;接着通过构建激光光斑强度分布模型进行激光光斑的分割;然后通过形态学腐蚀操作抑制误分割现象,同时对处理后的分割图像进行网格化划分,通过计算网格的可信度及中点坐标进行网格中点坐标的组合,完成一级光斑中心定位;最后结合先验知识和中心可能性得分进行中心点搜索调整,完成二级定位,得到激光光斑中心。经过实际场景验证,所提算法在远端激光强度较弱并且存在明显光路干扰的情况下,能够较好地完成远端激光光斑中心定位功能。

The locating of remote (over 500 m away from the monitoring station) laser spot center in the actual environment with weak laser intensity and laser path interference was studied.Firstly, image preprocessing was used to suppress camera noise.Secondly, the laser spot intensity distribution model was constructed to segment the laser spot.Then, morphological corrosion operation was used to suppress the false segmentation, and the processed segmentation image was meshed.By calculating the credibility of the grid and the coordinate of the center of the grid, the combination of the coordinate of the center of the grid was completed to locate the center of the first-order spot.Finally, in combination with prior knowledge and the score of center possibility, the center point search was adjusted to complete the secondary positioning, and the laser spot center was obtained.In verification under actual scenario, the proposed algorithm can perfectly locate the center of the remote laser spot in an environment with weak laser intensity and obvious optical path interference.