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 obtaine