蔡安妮
多媒体通信、图像处理与识别。
个性化签名
- 姓名:蔡安妮
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
通信技术
- 研究兴趣:多媒体通信、图像处理与识别。
北京邮电大学电信工程学院教授、博士生导师。1988年获美国加州大学圣巴巴拉分校电机与计算机工程博士学位,第九、十届北京市政协委员。专业领域为多媒体通信、图像处理与识别。先后主持过国家自然科学基金、国家863、国防科工委、八五攻关和公安部等重大科研项目,其中1998年完成的国家自然科学基金项目被选入国家自然科学基金资助项目优秀成果选编(三);“九五”期间完成的国家计委重大部门专项“全微机化分布式并行处理自动指纹识别系统”获得2000年度北京市科技进步二等奖。在国内、外刊物和国际会议上发表论文60余篇,出版专著、译著6部,其中与国外同行共同出版英文专著1部;撰写的面向21世纪课程教材“多媒体通信技术基础”获得北京市教育教学成果一等奖;在美国光学杂志上发表的论文被国际光电工程师学会(SPIE)收入20世纪该领域的里程碑文献集(MileStone Book)。目前正在进行的课题包括生物特征身份鉴别和宽带多媒体信息系统等。
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610
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成果数
10
蔡安妮, 戚伟世, 孙景鳌
通信学报,2004,25(10):148~154,-0001,():
-1年11月30日
VOD系统中,有限的磁盘I/O带宽或缓存空间往往成为系统的瓶颈。针对这一问题,提出了自相似业务下视频服务器的接纳控制算法。该算法运用等效带宽理论,通过在线测量系统所剩资源和周期容限的幅度变化来实时调节调度周期的大小,使得系统所剩资源达到动态的“等量”平衡。仿真结果表明,该算法不但简化了接纳过程,节约了系统资源,提高了算法的可实现性,而且系统的接纳率比Lee, Yeom所提算法的接纳率提高了15%,并且还可根据系统的Qos参数灵活调整接纳率。
接纳控制, 自相似, 动态调度周期, 等效带宽
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蔡安妮, 唐金山, 孙景鳌
电子学报,1999,27(1):89~92,-0001,():
-1年11月30日
在有限长信号的小波变换中一般说来零延拓不是一种好的边界处理方法但对有些类别的小波零延拓却能带来处理上的很大方便和收到良好的效果. 本文主要探讨了正交小波中低通滤波器hn的支撑为[O,M](即hn≠O, N=0.l,…, M; hn=O,n为其它值)的小波变换的边界处理司题,提出了零延拓是其较好的选择我们首先利用小波变换的性质证明了一个有意义的结论,然后由这个结论证明了这类小波边界零延拓的可完全恢复性,并给出了一种无失真恢复算法,最后把这种方法与其它几种边界处理方法作了比较,指出了这种边界处理的几个优点:一是边界的完全可恢复性,二是完全重构综合滤波器构造的简单性,三是滤波器的性能在边界处的稳定性.
正交小波变换,, 边界处理,, 零延拓,, 无失真恢复
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蔡安妮, 耿茵茵, 孙景鳌
电子学报 2002, (7): 1017~1019,-0001,():
-1年11月30日
为了有效地综合存在相关关系的多个判据的判决结果,本文提出了一种基于瓦罐模型的判决机制在图像分割司题中利用该机制,不但可以独立地确定具有相关性的各特征量的判决门限,而且可以在一次处理中同时完成分割和平滑本文给出了具有代表性的实验结果
多判据判决, 图像分割, 瓦罐模型
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蔡安妮, 唐良瑞)谢晓辉)蔡安妮)孙景鳌)
计算机学报,2003,26(1):887~892,-0001,():
-1年11月30日
在对DS证据理论进行简单分析之后,针对指纹图像提出了一种基于DS证据理论的图像分割算法该方法使用方向性和对比度两个信息分别作为两个分类器的特征,并利用模糊规则求出各分类器的基本概率分配函数,最后利用1)s证据理论的合成法则将两个分类器的结果进行融合判决该方法具有较高的稳健性和精确度,最后给出的实验结果验证了算法的有效性
指纹, 图像分割, DS证据理论, 信息融合
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【期刊论文】A Robust Fingerprint Minutiae Matching Algorithm Based on the Support Model
蔡安妮, Xiaohui Xie, Fei Su, Anni Cai, and Jing'ao Sun
,-0001,():
-1年11月30日
A novel method to match two minutiae point-sets based on the support model we proposed is presented in this paper. In this method, coarse matching is-rst performed from a number of seeds, and the re- sults are then fused to obtain a constrained corresponding relationship of minutiae in two point-sets. By using the support degree of the elements in the constrained relations, the one-to-one correspondence is-nally de-termined by comparison of similarity of local structures. Experiments show that this algorithm is robust and can deal with the translation, rotation, distortion and outlier problems well.
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【期刊论文】Hierarchical Storage design using queueing model in VOD system
蔡安妮, Li Qingguo Sun Songlin Cai Anni Sun Jing-ao
,-0001,():
-1年11月30日
In this paper, we discuss the relationship between the blocking probability and the configuration of storage hierarchy in a VOD server using the proposed queueing model. With this model, the optimal configuration of the storage system can be obtained. It will be benefit to the design of massive multimedia on demand systems.
VOD,, hierarchical storage,, blocking probability
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【期刊论文】Design Issues of an Integrated Environment for Multimedia Production, Storage and Transmission
蔡安妮, Anni Cni, Jing-ao Sun and Xitian Fu
,-0001,():
-1年11月30日
The hardware configuration and software architecture of an integrated environment for multimedia production, storage and transmission are introduced in this paper. Research topics involved are discussed with emphasis on I/O scheduling in a video server for variable-bit-rate streams.
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【期刊论文】Motion Estimation in DCT Domain†
蔡安妮, Mingzhou Song, Anni Cai, Member, IEEE and Jing-ao Sun, IEEE
,-0001,():
-1年11月30日
In this paper, a new block matching Criterion is proposed for motion estimation in video coding. The new criterion is based on a comparison between the discrete cosine transform (DCT) coefficients of two blocks to be matched. Since the spectrum of DCT statistically concentrates on the neighborhood of the dc component and the number of non-zero coefficients is quite small, only few coefficients need to be considered when matching blocks according to the new criterion. Almost in all the video coding standards, DCT is a necessary step for spatial redundancy reduction. Thus the generated DCT coefficients can be utilized in the new criterion. However, there are still some blocks whose DCT coefficients are not available. Several algorithms of calculating DCT coefficients of these blocks are given. When this new criterion is combined with the logarithm search, promising results are produced.
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蔡安妮, Y. J. He, A. Cai, and J.-A. Sun
IEEE TRANSACTIONS ON MEDICAL IMAGING, VOL. 12, NO.3, SEPTEMBER 1993,-0001,():
-1年11月30日
ln this paper, a new two-dimensional (2-D) searching flow scheme is proposed for the incremental backprojection algorithm [9]. In this scheme, the searching direction in a beam is determined only by the distance value of the current pixel to the corresponding ray; no pixeis outside the beam are involved in the procedure. In addition, the geometrical relationships between the image grids and the projection rays in different views are fully exploited to further reduce the searching operations. It is found that backprojection of four views, θ,π/2-θ,π/2+θ, and π-θ, can be performed at the same time, and the searching operation is only required for one of them if the number of views is even. Thus, backprojection is accomplished on a quartet-by-quartet basis of views as well as on a beam-by-beam basis. Our approaches not only minimize the number of searching operations but also possess a simple algorithm structure. Implementation results on an AST-386 computer for the incremental backprojection algorithm by using this new searching flow scheme and the relationship among projection views show that the processing time can be reduced by a factor of about 2, compared with the original method.
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【期刊论文】Design Issues of an Integrated Environment for Multimedia Production, Storage and Transmission
蔡安妮, Anni Cai, Jing-ao Sun, and Glen Wade, Life Fellow, IEEE
IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL, VOL. 39, NO.6, NOVEMBER 1992,-0001,():
-1年11月30日
An approach to take diffraction into account in acoustic nonlinear parameter imaging is described. In this type of tomography, two collinear planar waves with different frequencies are employed to insonify the object. The complexamplitude of the generated secondary wave at the difference frequency is detected for producing the projections. The algorithmic formulation relies on the use of two simultaneous governing wave equations for the primary and difference-frequency waves. Three algorithms are presented respectively for reconstructing weakly, moderately, and strongly scattering objects. Illustrations of quantitative tomogram of the nonlinear parameter generated from simulated data show good correlation with our theoretical results.
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