融合圆对称轮廓波统计特征和LBP的纹理图像检索  

The Texture Image Retrieval Algorithm Combined Statistical Features of the Circular Symmetric Contourlet with Local Binary Pattern

作　　者：练秋生[1] 李芹[1] 孔令富[1] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004

出　　处：《计算机学报》2007年第12期2198-2204,共7页Chinese Journal of Computers

基　　金：河北省教育厅自然科学项目基金(2004124)资助~~

摘　　要：圆对称轮廓波变换(CSCT)克服了轮廓波变换存在的频谱混淆现象,它比轮廓波变换的方向选择性更强.但由于CSCT中的方向滤波器组(DFB)有下抽样操作,CSCT不具有纹理分析所需要的平移不变性.文中用非抽样方向滤波器组(UDFB)代替CSCT中的DFB,构造了一种具有平移不变性的圆对称轮廓波变换(TICSCT).利用广义高斯分布描述TICSCT系数的边缘分布,图像之间的相似度用Kullback-Leibler距离(KLD)来度量.由于视觉感受明显不同的纹理图像可能具有相同的子带统计特性,边缘分布的KLD不是完备的纹理图像描述子.将KLD与其具有一定互补性的局部二值模式(LBP)相融合进行纹理图像检索,实验表明该算法比KLD,LBP和Gabor-Weighted-Euclid算法的平均检索率分别提高2.21%,4.02%和0.89%.The circular symmetric contourlet transform （CSCT） overcomes the aliasing phenomenon of contourlet transform, and it has better direction selectivity than the contourlet transform. However, since the down-sampling operation in CSCT, it lacks the translation-invariant property which is essential for texture analysis. In this paper, the translation-invariant CSCT（TICSCT） is constructed by replacing the directional filter bank （DFB） in CSCT with undecimated directional filter banks （UDFB）. The marginal distribution of TICSCT coefficients is modeled by generalized Gaussian density, and the similarity of two images is measured by Kullback-Leibler distance （KLD）. Since visually distinct patterns may have matching subband statistics, KLD isn＇t the complete texture descriptor. In this paper texture can be retrieved by combining KLD with local binary pattern （LBP） which is its complementary features to some degree. The experiments illustrate that the average retrieval rate of this method is 2.21%,4.02% and 0.89% higher than KLD, LBP and Gabor-Weighted-Euclid algorithm respectively.

关 键 词：轮廓波变换 图像检索 平移不变性 Kullback-Leibler距离 局部二值模式 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]