为了监测出核爆炸, 采用一种改进的Horn-Schunck算法, 进行了理论分析和实验验证。计算出连续帧核爆图片的光流场, 绘制出光流场图。例如, 取第1159帧和第1160帧图像, 得到了水平光流均值为0.018181pixel/s, 均方差为0.375775pixel/s; 垂直光流均值为-0.503308pixel/s, 均方差为0.896142pixel/s。结果表明, 根据图形及速度分布能够判断出核爆炸。

A improved Horn-Schunck algorithm method was proposed to judge nuclear explosion. The optic flow field of a consecutive sequence of frames of nuclear explosion was calculated and the picture of optic flow field was drawn. For example, the average horizontal optical flow field was 0.018181pixel/s with a mean square deviation(MSD)of 0.375775pixel/s and the average vertical optical flow field was -0.503308pixel/s with a MSD of 0.896142pixel/s at the 1159th frame and the 1160th frame. A preliminary judgment can be made that it is a nuclear explosion according the picture and velocities distribution.