基于相位相关算法的运动目标速度测量方法的研究

Research on measurement about moving target based on phase correlation algorithm

为了实现对运动目标的速度非接触式测量,研究了基于相位相关算法的目标运动速度测量方法。为了研究该方法,设计了一套基于FPGA的装置,装置连续采集运动目标的图像,对采集的相邻帧图像进行相位相关运算,得出相关峰值,峰值点的坐标即为目标的相对移动量,结合标定系数和采集间隔即可得出目标运动速度。通过不同光学环境下的实验,验证了该方法的正确性。所使用方法对光线环境依赖较低,不需要对图像进行预处理,保证了本非接触式测量方法的实时性和准确性。

In order to realize the non-contact measurement of velocity about moving target,a method of measuring moving target velocity based on phase correlation algorithm is rearched.In order to rearch this method,the device based on FPGA is designed,it can collect the moving target′s image continuously,then conducts these collected adjacent images using phase correlation calculation,obtaining the correlation peak value lastly.The coordinate of the this peak is the relative moving distance of the target,and the target′s moving speed can be obtained by combining the calibration coefficient and the collection interval.The correctness of the method is verified by experiments in different optical environments.This method is less dependent on the light environment and does not require image preprocessing,which ensures the real-time and accuracy of this non-contact measurement method.