一种基于半径和角度直方图描述形状的图像检索方法  

An Image Retrieval Method Based on Radius and Angle Histograms Shape Descriptor

作　　者：强振平[1] 陈旭[1] 林宏[1] 

机构地区：[1]西南林业大学计算机与信息学院,云南昆明650224

出　　处：《计算机与现代化》2012年第5期35-38,共4页Computer and Modernization

基　　金：云南省教育厅科学研究基金资助项目(50107002)

摘　　要：为了满足形状描述子必须具有平移、尺度、旋转变换不变性,采用基于区域的形状描述子半径直方图(Radius Histo-gram Descriptor),对于半径尺度变换采用归一化处理,解决其不满足尺度不变性问题;通过角度直方图(Angle HistogramDescriptor)获得形状径向特征,并且对其进行傅里叶变换求得特征模值向量,解决其不满足旋转不变性问题。结合半径和角度直方图描述子,使得检索得到的形状更符合人眼的感性识别。实验结果表明,该方法简单有效。In order to satisfy that the shape descriptors must be of translation,scale,rotation transformation invariance,this paper uses a shape descriptor based on region： radius histogram descriptor,and adopts a normalization processing of the radius size computation to solve the problem of scale invariance;computes the angle histogram descriptor to obtain the radial shape characteristics,and computes the module information vector of its Fourier Transform to solve the problem of rotation invariance.The joint of radius and angle histogram descriptors makes the retrieved shapes be identified by people＇s eyes very perceptually.Experimental results show that this method is simple and efficient.

关 键 词：半径直方图 角度直方图 形状检索 图像检索 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]