Laplacian算子应用
多元函数的二阶导数又称为Laplacian算子:\[\triangledown f(x, y) = \frac {\partial^2 f}{\partial x^2} + \frac {\partial^2 f}{\partial y^2}\]对于图像上的离散\(f(x, y)\):\[\triangledown f(x, y) = f(x + 1, y) + f(x - 1,y) ...
