关键词: 图像稀疏表示, 视觉特性, 双树复数小波, 局部竞争

Abstract: A sparse representation scheme of images which is inspired from overcomplete multiresolution transforms and combined with visual characteristic，is proposed.This algorithm models simple cell receptive fields through dual-tree complex wavelets.The model also incorporates inhibition and facilitation interactions between neighboring cells to choose a number of coefficients of transformation to achieve the sparse representation of initial images，by utilizing the local competition and inhibition method.The experiment results show that the proposed scheme outperforms others.

Key words: sparse representation of images, human visual system, dual-tree complex wavelet, local competition