共轭梯度迭代法，主要用于图像稀疏重建、图像去噪的算法-Conjugate gradient method, mainly for sparse image reconstruction, image de-noising algorithm

稀疏矩阵求解器，图像中应用非常广泛，比如possion克隆等-Sparse matrix solver, the image is widely used, such as possion cloning

实现论文 基于稀疏表示的图像超分辨率《Image Super-Resolution Via Sparse Representation》中的Figure2，通过对100000个高分辨率和低分辨率图像块训练得到的高分辨率图像块字典，字典原子总数为512，图像块尺寸大小为9X9.-The Figure2 in 《Image Super-Resolution Via Sparse Representation》