A hierarchical dense deformable model for 3D face reconstruction from skull

3D face reconstruction from skull has been investigated deeply by computer scientists in the past two decades because it is important for identification. The dominant methods construct 3D face from the soft tissue thickness measured at a set of landmarks on skull. The quantity and position of the landmarks are very vital for 3D face reconstruction, but there is no uniform standard for the selection of the landmarks. Additionally, the acquirement of the landmarks on skull is difficult without manual assistance. In this paper, an automatic 3D face reconstruction method based on a hierarchical dense deformable model is proposed. To construct the model, the skull and face samples are acquired by CT scanner and represented as dense triangle mesh. Then a non-rigid dense mesh registration algorithm is presented to align all the samples in point-to-point correspondence. Based on the aligned samples, a global deformable model is constructed, and three local models are constructed from the segmented patches of the eye, nose and mouth. For a given skull, the globe and local deformable models are iteratively matched with it, and the reconstructed facial surface is obtained by fusing the globe and local reconstruction results. To validate the presented method, a measurement in the coefficient domain of a face deformable model is defined. The experimental results indicate that the proposed method has good performance for 3D face reconstruction from skull.     

基于分维搜索和环状描述符的SIFT改进算法

针对SIFT算法在极值点搜索和特征计算方面的低效,提出一种基于分维搜索和环状描述符的SIFT匹配算法(SC-SIFT)。该算法将SIFT算法中的三维极值点搜索策略分解(separate)为两个维度上的逐维搜索,同时引入了一种新的环状(cricoid)特征描述算子来代替原来高维低效的特征。实验证明,该方法不仅能够提高SIFT算法的执行效率,而且提高匹配正确率,实现了对SIFT算法的优化。     

基于改进遗传算法的智能组卷在试题库建设中的研究

智能组卷是计算机辅助教学（CAI）中一个重要的研充课题,本文通过分析组卷的各项约束指标,建立了智能组卷的数学模型,并提出了～种基于改进遗传算法的好的智能组卷算法。     

安钢SAP预留系统的开发与应用

本文简述了安钢信息化建设概况,介绍了安钢信息化建设中开发SAP预留系统的设计流程,阐述了预留系统实现的功能.     

配电网自动化系统线路故障自动隔离功能

馈线自动化是配电网自动化系统一个非常重要的功能,在国内目前这方面的技术还不够成熟.本文探讨了配电网故障自动查找并隔离的方法.     

浅议多媒体在教学中的应用

文章首先阐述了多媒体教学的概念及其优点,然后结合作者教学体会讨论了多媒体课件的制作思想和在教学中的应用.     

浅谈多媒体教室的维护与科学管理

多媒体教室的设备直接影响着多媒体教学,本文主要论述怎样进行多媒体教室的管理和维护,简要提出了日常使用过程中应注意的事项以及解决的方法,以此科学做好多媒体教室设备的管理,从而确保多媒体教室真正为教学服务.     

用于视觉传感器的有理系数小波滤波器的设计

有理系数小波滤波器的设计可以通过降低小波函数消失矩阶数来实现,但设计方程中出现的自由变量的取值需要在一定的范围之内,因为需要满足Daubechies紧支集条件。归纳总结了有理系数小波滤波器的设计过程,并以长度为4的有理系数小波滤波器设计为例,对如何确定设计方程中自由变量的取值范围进行了讨论,以得到适用于视觉传感器图像处理算法硬件实现的有理系数小波滤波器。     

基于关联规则的商品推荐系统

关联规则是数据挖掘中的一个重要问题,本文在研究关联挖掘的基础上,通过对过去客户的交易记录进行分析,建立关联规则,为客户提供商品推荐,从而也为电子商务网站店主提供正确的盈利导向。     

Solution to Generalized Sylvester Matrix Equations

An explicit solution to the generalized Sylvester matrix equation AX+BY= EXF is established. This solution is expressed in terms of the R-controllability matrix of (E, A, B), a generalized symmetric operator matrix and an observability matrix. Moreover, based on this solution, solutions to some other matrix equations are also derived. The results may provide great convenience for the analysis and synthesis problems related to these equations.