中文说明：对256×256大小的8bit灰度lena图像进行仿真计算，稀疏矩阵采用DCT矩阵，观测矩阵采用高斯随机矩阵，重构算法采用OMP（正交匹配追踪）算法。
English Description：
The sparse matrix is DCT matrix, the observation matrix is Gaussian random matrix, and the reconstruction algorithm is OMP (orthogonal matching pursuit) algorithm.