基于图像透视畸变校正的调炮速度测量方法

针对传统调炮速度测试过程繁琐、测量精度低的问题，提出了一种图像透视畸变校正的调炮速度测量方法。采用激光器、靶板、CCD相机和计算机构建调炮速度测量系统，利用CCD相机实时记录激光在靶板上的光斑位置，根据光斑的位移和时间解算出调炮速度。利用特征点成像，通过透视变换原理构建变换矩阵求得图像校正模型，进而实现光斑靶板图像的透视畸变校正，在校正后的图像上提取光斑并计算出光斑质心，获取光斑质心的位移和时间，最终解算出调炮速度。实验结果表明：与传统的图像测量方法相比，利用该方法测量调炮速度的精度提高了10倍，满足靶场对高精度测量调炮速度的要求；该方法适用于靶场测试以及其他调炮速度的实际测量工程。

Gun Slaving Speed Measuring Method Based on Image Perspective Distortion Correction

A gun slaving speed measuring method based on image perspective distortion correction is proposed to solve the complicated operation and low measurement accuracy of traditional measuring method. In the proposed measuring method, a gun slaving speed measuring system composed of laser, target plate, CCD camera and computer is established. The CCD camera is responsible for real-time recording of positions of laser spot on the target plate. The gun slaving speed could be calculated according to the displacement and time of laser spot. Based on feature point imaging, a transformation matrix is built according to the perspective transformation principle, through which an image correction model is acquired, thus enabling to realize the perspective distortion correction of laser spot images on the target plate. Laser spot on the corrected image is extracted, and its barycenter is computed to get the displacement and time of the barycenter. The gun slaving speed is calculated. Experimental results show that the proposed measuring method has 10 times higher measuring accuracy of gun slaving speed than that of the traditional method. The method is applicable to range test and other measuring engineering of gun slaving speed.