分块统计

说明：  将电镜扫描图片分块化后统计各分块孔隙密度，获得扫描区域内孔隙率分布矩阵，将矩阵进行三维样条曲面插值，绘制相应的等高线，并保存为图片。
(After the electron microscope scanning image is divided into blocks, the pore density of each block is calculated, and the porosity distribution matrix in the scanning area is obtained. The matrix is interpolated by the three-dimensional spline surface, and the corresponding contour lines are drawn and saved as pictures.)