中文说明：代码主要功能是图像去噪1.将矩阵转换为稀疏矩阵2.稀疏矩阵的各种运算（加、减、乘）3.稀疏矩阵的GS和雅各比求解4.将含噪点的图片读入矩阵之后对图片进行去噪操作
English Description：
Main function code is image noise reduction 1. converts the matrix is a sparse matrix 2. sparse matrix operations (add, subtract, multiply) 3. sparse matrix solution of the GS and Jacoby 4. read the picture containing noise in operation matrix for image denoising