一种参数化影像多目标检索的相似度评估模型  

A parameterized evaluation model of similarity on multi-target retrieval for remote sensing image

作　　者：曾志[1] 周永福[2] 杜震洪[3] 刘仁义[3] 

机构地区：[1]惠州学院计算机科学系,惠州516007 [2]河源职业技术学院电子与信息工程学院,河源517000 [3]浙江大学地理信息科学研究所,杭州310028

出　　处：《国土资源遥感》2015年第4期8-13,共6页Remote Sensing for Land & Resources

基　　金：国家自然科学基金项目"内容-过程的海气二氧化碳源汇格局及时空演变研究"(编号:4101356);博士启动基金项目"云环境下大数据遥感影像高效处理关键技术"(编号:C513.0201)共同资助

摘　　要：在基于影像内容的图像检索中,检索目标的特征选取与相似度计算是当前研究的热点问题。面向对象的图像处理方法有利于描述对象及对象间的空间关系,因此,在影像多维特征描述的基础上,提出了一种参数化影像多目标检索的相似度评估模型。该模型既考虑了影像目标间的空间关系,又顾及了影像目标局部特征间的相似度。首先,借鉴动态图像专家组-7(moving picture experts group,MPEG7)基于内容的图像层次化描述模式的层次分析法(analytic hierarchy process,AHP)描述影像内容的多维特征,并采用已有的方法分别计算各特征值;然后,根据用户偏好设置各特征的权重系数,计算检索目标的整体相似度。该模型可定性地评价多目标检索的效果,为对影像数据库进行多目标检索提供参考与借鉴。通过实验发现,影像的目标检索不仅与相似度计算方法有关,而且与影像本身的内容复杂度有关。In content - based image retrieval （ CBIR ） , the feature selection of target retrieval and similarity computing is a hot issue of current research. As the object-oriented image processing methods are conducive to describing the spatial relationships between objects, the authors proposed an parameterized evaluation model of similarity for multi-target retrieval on the basis of an analysis of multi-feature descriptor. This model not only takes into account the global spatial relationship between image objects but also considers the local features of image targets. The model organizes the multi -dimensional features for an image using the analytic hierarchy process （ AHP） method under moving picture expert group （ MPEG7 ） standard, then the eigenvalues are calculated using existing methods, and finally the weighting coefficients are set for calculating the overall similarity on the basis of user preferences so as to evaluate the effect of multi-target retrieval. Thus it can provide a powerful reference and experience for multi-target retrieval in an image database. The experimental results show that target retrieval is not only related to the method of similarity calculation but also related to the complexity of the image itself.

关 键 词：遥感影像 多目标检索 相似度评估模型 

分 类 号：TP751.1[自动化与计算机技术—检测技术与自动化装置] TP391[自动化与计算机技术—控制科学与工程]