针对靶场试验中目标三维姿态测量的问题,研究了一种全自动测量轴对称目标三维姿态的新方法。首先对靶场目标成像模型进行分析,其次采用几何主动轮廓模型(GAC)和改进的Hough变换算法高精度提取图像上目标的中轴线,在此基础上利用目标成像的共线方程对传统中轴线法求出的俯仰角和偏航角进行自动修正,消除了传统中轴线法求取目标姿态结果的二义性,得到了符合实际情况的目标三维姿态参数。实验证明,该算法能高精度地提取目标中轴线,并可快速求解真实的三维姿态角。

A novel method for automatic measurement of target’s 3D gesture was proposed here to solve the problem of measurement of target’s 3D gesture in target trials of shooting range. Firstly, the model of imaging was analyzed. Secondly, geometric active contour and improved Hough transform were used for extracting axes of symmetry target precisely. Then, the 3D gesture parameters were corrected automatically by making use of the collinear equation in imaging model, which eliminated the duality of 3D gesture parameters and gained the actual results. Experiment results show that the method can extract the axes of axisymmetric target effectively in high precision and get correct 3D gesture parameters.