全局运动多分辨率光流估计算法的改进与实现

Improvement and Implementation of Global Motion Multi-resolution Optical Flow Estimation Algorithm

为了提高低分辨率图像之间的位移估计精度,在传统光流算法的基础上,提出了全局运动的多分辨率光流估计算法.实验结果表明:该算法能够快速实现小位移和准确的实现大位移的运动估计,通过对互有亚像素位移的多帧低分辨率图像对比相位相关法进行运动估计,改进的多分辨率光流估计算法实现的高精度亚像素位移误差精度为0.05pi.

In order to improve the estimation precision of displacement among low resolution images,the paper proposes an optical flow estimation algorithm of global motion with multi-resolution,based on the traditional optical flow algorithm.The experimental results shows that the algorithm can realize fast small displacement motion estimation and accurate big displacement motion estimation.The estimation is implemented for images of low resolution with sub-pixel displacement,compared with correlation phase estimation.The results show that this improved algorithm achieves high precision pixel displacement estimation and the precision reaches 0.05pi.