backward difference

基本解释

The forward-backward difference can not only detect the static and motion regions but also detect the 3-2 Pull-Downed movie sequences.
对于检测到的电影序列，则进行3 2下拉恢复处理，输出电影模式的逐行扫描帧；
By using backward difference of space-time intensity correlation function with respect to time delay, the two-dimensional velocity vector of a moving diffuser can be measured.
利用远场时变散斑空-时强度相关函致的有限差商可以测量散射体运动的二维速度矢量。
The advantage of this method is that the difference schemes obtained in this way can be solved by the efficient algorithm of three point convolution and forward-backward recurrence.
这一方法的特点在于所构造的差分方程的拟合分解格式可以通过三点褶积和正、反递归被快速求解。