关键词: Contourlet变换, 特征提取, 图像检索

Abstract: Based on the characteristics of good sparsity and capturing effectively the smooth contours in natural images for Contourlet transform.This paper completes texture analysis of the image on the demographic characteristics of Contourlet coefficient and pursues a filter algorithm.According to the statistical characteristics of Contourlet coefficients，Gauss model is used to demonstrate the statistics of those coefficients and extraction feature.The feature vector is weigh ted according to their degrees of the dispersion，and the feature with higher discrimination quality has bigger weight.At the same time，it obtains the final feature vectors by adding the statistic properties of the gray level co-occurrence matrix extracted from the sub band low-frequency.The texture similarities of images are computed by the Euclidean’s distance with weight.Simulation results show that the method perform certain superiority in the retrieval results.

Key words: Contourlet transform, feature extraction, textureretrieva