Detection of Human Faces in Complex Scenes

在模式识别与图像处理研究领域中，人脸检测是一个备受关注的研究方向，也是人脸识别的关键步骤。随着智能化信息处理技术的发展，人脸检测的应用背景已经远远超出了人脸识别系统的范畴，它在安全访问控制、智能监控、视频会议、基于内容的图像检索等方面有着日益广泛的应用前景。然而，人脸作为人类自身再熟悉不过的一个组成部分，其检测问题却是个极富挑战性的课题。如果能找到高性能的解决方法，将为解决其它类似的复杂模式检测问题提供重要的启示，这使得研究快速而准确的人脸检测技术具有了十分重要的意义。本论文研究的是较复杂场景的彩色图像序列中竖直正面人脸的检测问题，提出了肤色分割和支持向量机相结合的人脸检测算法。论文一开始对所...Human face detection is an important problem in pattern recognition and image processing. And it is the key step of face recognition. With the development of intellectualized technology，human face detection has wide applications in many fields such as security access control，intelligent supervision，video conference and content-based image retrieval. Human faces are familiar to us，but theirs detect...学位：工学硕士院系专业：计算机与信息工程学院计算机科学系_计算机应用技术学号：20032802

Approach of Color Image Edge Detection Based on Color Tracking

传统的边缘检测方法大都是基于灰度图像的,用于彩色图像边缘检测时效果往往不能令人满意.本文提出了一种新的彩色边缘检测算法,它充分考虑了彩色图像的边缘特性,使用彩色差进行跟踪,从而弥补了传统边缘检测方法检测时丢失边缘的不足.通过与其它成熟的边缘检测技术进行比较,结果显示:该算法能提取更多的彩色边缘信息,而且检测精度和效果都比较令人满意,具有一定的实用价值和良好的处理效果.The traditional methods of detecting edges are mostly based on gray images,which did not satisfy in detecting color image edges.In this paper,a new algorithm for detecting color image edge is presented.The new algorithm is based on color tracking and it focused on the property of edge.By comparisons with other well-established technologies for edge detection,the result shows that the new algorithm has practical value and better effect and it observes more color edge information and its detecting precision and effectiveness are satisfying

Research on fast face location in color sequent images

在模式识别与图像处理研究领域中,人脸定位是一个备受关注的研究方向。提出了一种彩色序列图像中实现人脸快速定位的方法,该方法首先利用差分算法初步确定图像中运动的区域。接着用分段的方法对运动区域进行肤色分割,排除非皮肤部分。最后根据先验知识,采用一系列的有效措施对候选人脸区域进行过滤,实现人脸定位。实验结果显示,论文研究的方法不仅能基本达到实时,而且具有较好的鲁棒性。Face location is an important research in pattern recognition and image processing.This paper proposed a method of fast face location in color sequent images.Firstly,frame difference is used to ascertain the motion area preliminaryly in the color image.Then,the skin segmentation algorithm is used to remove the nonskin color parts in the motion area.Finally,the candidate face regions are examined based on the knowledge of human face and located.The test results indicate that the system not only could be real-time,but also has a good robustness

Face Detection Based on DCT Eigenvalue and SVM Classification

一般的人脸检测在运行时间及检测率上都不能得到很好的保证.本文提出了基于离散余弦变换的支持向量机的人脸检测方法,利用离散余弦变化后的系数作为支持向量机的输入特征,实验表明该方法具有更好的检测效果.实验还表明,在采用离散余弦变换系数作为检测特征值时,检测准确率并不是随着所选取特征值个数的增加而提高.Usually the runtime and detection rate of face detection were unsatisfactory.In this paper,we presented a method based on discrete cosine transform and Support Vector Machine.It used the coefficient of discrete cosine transformation as the eigenvalue of support vector machine.The experiment shows that it had a better result of detecting faces,and when discrete cosine transform coefficients were userd as eigenvalue,the detection rate was not increased with increasing the number of selected eigenvalue厦门大学985二期工程项目资

Face Detection Based on DCT Eigenvalue and SVM Classif ication

摘要: 一般的人脸检测在运行时间及检测率上都不能得到很好的保证.本文提出了基于离散余弦变换的支持向量机的 人脸检测方法 ,利用离散余弦变化后的系数作为支持向量机的输入特征 ,实验表明该方法具有更好的检测效果.实验还 表明 ,在采用离散余弦变换系数作为检测特征值时 ,检测准确率并不是随着所选取特征值个数的增加而提高.Abstract : Usually the runtime and detection rate of face detection were unsatisfactory. In this paper ,we presented a method based on discrete cosine t ransform and Support Vector Machine. It used the coefficient of discrete cosine t ransformation as the eigenvalue of support vector machine. The experiment shows that it had a bet ter result of detecting faces ,and when discrete cosine t ransform coefficient s were userd as eigenvalue ,the detection rate was not increased with increasing the number of selected eigenvalue基金项目:厦门大学985 二期工程项目资

一例华南虎纤维组织瘤样增生的诊治

韶关某繁育基地一只14岁雄性华南虎（Panthera tigris amoyensis）右前脚掌背皮肤出现破损红肿，且肿块日渐增大。专家初步诊断该肿块为良性肿瘤，并实施切除手术。通过血常规、生化指标检查、分子生物学以及病理组织学技术进行检查与诊断分析。结果显示：患虎血细胞比容、平均红细胞体积、平均红细胞血红蛋白含量3项指标降低，丙氨酸氨基转移酶和天冬氨酸转氨酶显著升高且存在立克次氏体感染。此外，病理组织学鉴定切除肿块为纤维组织瘤样增生，为良性肿瘤。这一病例报导，可为虎此类疾病的诊断及防控提供经验

The Expression of hnRNP A2/B1 and Regulation during the Apoptosis in Human Immortalized Epidermal HaCaT Cells Induced by Curcumin

通讯作者。Tel: 0592-2185363, E-mail: [email protected][中文文摘]该文以姜黄素诱导人永生化表皮HaCaT细胞凋亡为基础,对hnRNP A2/B1在核基质中的存在、分布及其与细胞凋亡相关基因产物的共定位及相互作用关系进行了研究。蛋白质印迹结果显示,hnRNP A2/B1存在于HaCaT细胞核基质蛋白组分中,在经过姜黄素处理后,表达下调;激光共聚焦显微镜观察显示,hnRNP A2/B1在HaCaT细胞中分别与Fas、p53和Bax等基因产物具有共定位关系,姜黄素处理后其共定位区域出现由核膜或核仁向胞质转移的趋势。GST pull-down实验证实,hnRNPA2/B1分别与Fas、p53和Bax有直接相互作用关系。结果表明,hnRNPA2/B1作为一种核基质蛋白,通过与细胞凋亡相关基因产物的相互作用参与HaCaT细胞的凋亡诱导调控过程,这对深入认识核基质蛋白在细胞凋亡过程中的调控机制具有重要意义。[英文文摘]This paper explore the existence and distribution of hnRNP A2/B1 in nuclear matrix, and the colocalization relationship between hnRNP A2/B1 and the products of some apoptosis interrelated genes in the human immortalized epidermal HaCaT cells before and after curcumin treatment. It was confi rmed by Western blot that hnRNP A2/B1 existed in the component of nuclear matrix protein of HaCaT cells and its expression was decreased by curcumin treatment. The co-localization between hnRNP A2/B1 and the products of apoptosis interrelated genes including Fas, p53 and Bax were observed by using laser scanning confocal microscopy. The recombinant protein was expressed and purified after building a prokaryotic expression vector pGEX-4T-2-hnRNP A2/B1, and GST pull-down assay confi rmed that hnRNP A2/B1 directly interacted with Fas, p53 and Bax, respectively. The results of this study demonstrated that hnRNP A2/B1 was a nuclear matrix protein and locacted in the nuclear matrix, and the distribution of hnRNP A2/B1 and its relationship with associated gene products play important role during the apoptosis of HaCaT cells, which had great significance in in-depth understanding of regulatory mechanisms of nuclear matrix proteins in apoptosis.国家自然科学基金(No.30871241)资助项

我国圈养和野生东北虎种群线粒体基因组遗传多样性的比较研究

东北虎（Panthera tigris altaica）是体型最大的猫科（Felidae）动物之一，是极具代表性的珍稀野生动物。现有研究表明，我国野生东北虎种群遗传多样性较低、近交水平较高。尽管目前我国野生东北虎的数量在逐步增长，但通过人工干预来提高野生东北虎的遗传多样性会更利于其数量的恢复，通过野化放归进行遗传拯救是一种关键策略，但实施遗传拯救之前，必须确定圈养个体与现存野生个体间的遗传关系。采用粪便DNA的高通量测序数据组装了51只横道河子圈养东北虎和13只完达山、老爷岭等地的野生东北虎的线粒体基因组，分析两者之间的关系，评估线粒体基因组的遗传多样性。结果表明：圈养东北虎的遗传多样性高于野生种群，所有遗传变异均为无害。部分圈养个体与野生种群同属一个进化支，且具有野生种群所不包含的遗传变异，可用于实施遗传拯救。此外，圈养种群存在显著的遗传分化，一个与当前野生种群关系很远的分支可能代表未知的地理种群，因此，建议对该远缘分支开展野外来源的追溯，确定其谱系地理学地位和保护价值，使其成为恢复野外历史遗传多样性的后备资源