The base functions we got has the character of localization and band pass which is the same as human visual system. Due to its response of sparsely distribution, the set could be used to code images as bases. 该函数集合具有人眼视觉系统所具备的局部性和带通特性,其响应概率分布也满足稀疏分布,可以作为用于编码图像的基函数。