针对气动光学效应引起的图像像素偏移问题,提出了一种基于特征点配准的校正方法,并建立了像素偏移的数学模型。由于高速流场引起的像素偏移具有很强的随机性和非线性等特点,该方法在根据序列多帧图像的像素点偏移变化的统计规律获取原图像的像素点初始位置的基础上,采取二阶非线性函数模型来拟合畸变图像的像素偏移量,从而实现对各帧畸变图像的像素偏移校正。在微机上进行了仿真校正实验,结果表明该方法有效。 Aiming at the problem of image pixel shift caused by aerodynamic optics, a method based on registration of feature points is proposed and a mathematical model of pixel shift is established. Due to the randomness and non-linearity of the pixel offset caused by the high-speed flow field, this method obtains the initial pixel position of the original image according to the statistical rule of the pixel point variation of the multi-frame image sequence, The second-order nonlinear function model is adopted to fit the pixel offset of the distorted image, so that the pixel offset correction of each distorted frame image can be achieved. The simulation experiment is carried out on the computer. The result shows that this method is effective.