表示出两帧图像间各个像素点的相对情况，利用最小二乘法进行拟合多元非线性方程，包括AHP，因子分析，回归分析，聚类分析。- Between two images showing the relative circumstances of each pixel, Multivariate least squares fitting method of nonlinear equations, Including AHP, factor analysis, regression analysis, cluster analysis.