计算两个矩阵之间的欧氏距离，完整的图像处理课设，包含所有源代码，汽车图像，该函数用来计算任意函数的一阶偏导数(数值方法)。- Calculation of the Euclidean distance between the two matrices, Complete class-based image processing, contains all of the source code, auto image, This function is used to calculate the