关键词: 纹理图像, 检索系统, Contourlet-1.3变换, 检索率

Abstract: Focusing on the low retrieval rate of contourlet texture image retrieval system，an anti-aliasing Contourlet-1.3 transform based texture image retrieval system is proposed.In the system，the Contourlet-1.3 transform is constructed by anti-aliasing critical subsampled Laplacian pyramid cascaded by critical subsampled directional filter banks，sub-bands energy and standard deviations in contourlet domain are cascaded to form feature vectors，and the similarity metric is Canberra distance.Experimental results show that anti-aliasing contourlet transform based image retrieval system is superior to those of the original contourlet transform，nun-subsampled contourlet system and Contourlet-2.3 under the same system structure with almost same length of feature vectors，retrieval time and memory needed;and anti-aliasing contourlet decomposition structure parameter can make significant effects on retrieval rates.

Key words: texture image, retrieval system, Contourlet-1.3 transform, retrieval rate