中文说明：
BP神经网络用于函数拟合与模式识别，包括主成分分析、因子分析、贝叶斯分析，表示出两帧图像间各个像素点的相对情况。
English Description：
BP neural network is used for function fitting and pattern recognition, including principal component analysis, factor analysis and Bayesian analysis, to show the relative situation of each pixel between two images