改进的旋转不变区域纹理谱描述符

Improved texture spectrum descriptors in rotation invariant region

针对区域纹理谱描述符不具备旋转不变性的问题,引入了旋转不变算符,对局域纹理谱描述符进行了改进。采用区域纹理谱直方图描述图像统计纹理特征,采用局部旋转不变量描述不同区域变化特征,然后融合两种特征作为索引并进行图像检索。采用3种不同类型的图像库对本文方法的检索效果进行了详细比较。实验结果表明,本文提出的旋转不变纹理谱描述符可有效提高对旋转纹理图像的检索精度。

Three region texture spectrum descriptors,center-symmetric local binary pattern（CS-LBP）,direction local binary pattern（D-LBP） and improved D-LBP（ID-LBP） are discussed in detail.Then,three rotation invariant texture descriptors,CS-LBP variance（CS-LBPV）,D-LBP variance（D-LBPV） and improved D-LBP variance（ID-LBPV）,are proposed in the paper to characterize the local contrast information into one-dimensional texture histogram.The three descriptors are tested and compared on three commonly used image databases and the experimental results show the performance of the methods in different databases.