分区变形与多尺度约束结合的3D面皮点对应  

3D facial correspondence based on regional deformation and multi-scale constraint

作　　者：杜洪强[1] 周明全[1] 李康[1] 贺毅岳[2] 贺洁琼[1] 

机构地区：[1]西北大学信息科学与技术学院,西安710127 [2]西北大学经济管理学院,西安710127

出　　处：《计算机应用研究》2013年第7期2223-2225,2229,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(60736008);国家重点基础研究发展计划前期专项项目(2011CB311801);高等学校博士学科点专项科研基金(新教师)资助项目(20116101120018);陕西省教育厅项目(12Jk0730)

摘　　要：针对准确建立3D面皮间点对应关系这一难题,引入积分不变量的多尺度约束,提出了分区变形与多尺度约束结合的3D面皮点对应方法。首先对待对应面皮和参考面皮进行法兰克福坐标矫正和特征点的标定。然后在对面皮完成测地线分区的基础上,对各分区进行径向基函数变形,使两个面皮的相应分区近似重合。最后在参考面皮上选取待对应点,根据重合的面皮分区间局部相对位置的稳定性,在待对应面皮上建立待对应点的候选集,利用体积积分不变量的多尺度约束选定最佳对应点,进而实现了3D面皮的点对应。实验表明,算法有效提高了点对应的准确度。Aiming at the precise 3D point correspondence between faces samples,this paper introduced integral invariants for multi-scale constraints,and proposed a method of 3D point correspondence based on non-rigid regional deformation combined with multi-scale constraints.First,it marked the feature points based on the unified Frankfurt coordinate on pending corresponding faces and reference faces.Second,with completing geodesic partition of faces samples,it deformed each region of faces samples by radial basis function,so that pending corresponding faces’ regions approximately coincided with the reference faces’ regions.Finally,it selected the corresponding point on reference face according to the stability of the relative positions of faces’ regions,and created candidate set of corresponding point on pending corresponding faces,it used the multi-scale constraint based on volume integral invariants to select best corresponding point,thus it achieved 3D point correspondence.The experiments show the proposed algorithm effectively improve the precision of point correspondence.

关 键 词：三维面皮 测地线 径向基函数 点对应 多尺度约束 积分不变量 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]