数字图像处理中，卷积 (convolution)和互相关 (cross-correlation)的关系？ - 知乎 Two-dimensional correlation is equivalent to two-dimensional convolution with the filter matrix rotated 180 degrees See the Algorithm section for more information about how filter2 performs linear filtering
相关系数和R方的关系是什么？ - 知乎 维基百科Coefficient of determination（也就是R方）有明确的解释： “ In linear least squares multiple regression with an estimated intercept term, R^2 equals the square of the Pearson correlation coefficient between the observed y and modeled (predicted) f data values of the dependent variable ”