2009 IEEE 17th Signal Processing and Communications Applications Conference最新文献_第5页

Occlusion artifact removal in video frame rate up-conversion 视频帧率上转换中遮挡伪影的去除

2009 IEEE 17th Signal Processing and Communications Applications Conference Pub Date : 2009-04-09 DOI: 10.1109/SIU.2009.5136386

Burak Cizmeci, H. Ateş

{"title":"Occlusion artifact removal in video frame rate up-conversion","authors":"Burak Cizmeci, H. Ateş","doi":"10.1109/SIU.2009.5136386","DOIUrl":"https://doi.org/10.1109/SIU.2009.5136386","url":null,"abstract":"In the past, frame rate up-conversion (FRC) methods were commonly used in standards conversion. Today, FRC methods are used for digital video temporal resolution enhancement to improve the visual quality in large screen LCD and plasma TV sets. The increase in processing power of DSPs, FPGAs and ASICs enables high complexity algorithms in the design of FRC systems. In this paper, we propose a multi-stage motion vector (MV) post-processing algorithm with occlusion adaptive overlapped block motion compensation, which increases the temporal resolution without loss of spatial resolution and consistency. Hexagonal search block matching yields us unreliable MVs which are post-processed in the refinement stages in order to get a consistent MV field in spatial domain. Relations between neighboring MVs and the MV fields of 4 consecutive frames are utilized to detect occlusion regions. Overlapped Block Motion Compensation (OBMC) is adapted to these problematic regions in order to reduce artifacts due to occlusion. Compared to existing methods, the developed algorithm achieves FRC with reduced loss of spatial resolution and reduced amount of artifacts.","PeriodicalId":219938,"journal":{"name":"2009 IEEE 17th Signal Processing and Communications Applications Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132581278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

An Expectation-Maximization type receiver for uplink of a hopping system with time sharing 一种基于分时跳频系统上行链路的期望最大化型接收机

2009 IEEE 17th Signal Processing and Communications Applications Conference Pub Date : 2009-04-09 DOI: 10.1109/SIU.2009.5136363

G. Cam, Erdogan Aydin, N. Kabaoğlu

引用次数: 0

Decentralized random-field estimation under communication constraints 通信约束下的分散随机域估计

2009 IEEE 17th Signal Processing and Communications Applications Conference Pub Date : 2009-04-09 DOI: 10.1109/SIU.2009.5136448

Murat Uney, M. Çetin

{"title":"Decentralized random-field estimation under communication constraints","authors":"Murat Uney, M. Çetin","doi":"10.1109/SIU.2009.5136448","DOIUrl":"https://doi.org/10.1109/SIU.2009.5136448","url":null,"abstract":"We consider the problem of decentralized estimation of a random-field under communication constraints in a Bayesian setting. The underlying system is composed of sensor nodes which collect measurements due to random variables they are associated with and which can communicate through finite-rate channels in accordance with a directed acyclic topology. After receiving the incoming messages if any, each node evaluates its local rule given its measurement and these messages, producing an estimate as well as outgoing messages to child nodes. A rigorous problem definition is achieved by constraining the feasible set through this structure in order to optimize a Bayesian risk function that captures the costs due to both communications and estimation errors. We adopt an iterative solution through a Team Decision Theoretic treatment previously proposed for decentralized detection. However, for the estimation problem, the iterations contain expressions with integral operators that have no closed form solutions in general. We propose approximations to these expressions through Monte Carlo methods. The result is an approximate computational scheme for optimization of distributed estimation networks under communication constraints. In an example scenario, we increase the price of communications and present the degrading estimation performance of the converged rules.","PeriodicalId":219938,"journal":{"name":"2009 IEEE 17th Signal Processing and Communications Applications Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133639921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D object recognition by geometric hashing 基于几何哈希的三维物体识别

2009 IEEE 17th Signal Processing and Communications Applications Conference Pub Date : 2009-04-09 DOI: 10.1109/SIU.2009.5136550

Omer Eskizara, E. Akagunduz, ilkay Ulusoy

引用次数: 4

A theoretical analysis of feature fusion in Stacked Generalization 堆叠泛化中特征融合的理论分析

2009 IEEE 17th Signal Processing and Communications Applications Conference Pub Date : 2009-04-09 DOI: 10.1109/SIU.2009.5136454

M. Ozay, Fatoş T. Yarman Vural

引用次数: 2

Discrete wavelet transform based approach for current transformer saturation problem 基于离散小波变换的电流互感器饱和问题求解方法

2009 IEEE 17th Signal Processing and Communications Applications Conference Pub Date : 2009-04-09 DOI: 10.1109/SIU.2009.5136429

O. Ozgonenel, E. Kılıç, U. K. Terzi

引用次数: 0

Video content analysis using dominant sets 基于优势集的视频内容分析

2009 IEEE 17th Signal Processing and Communications Applications Conference Pub Date : 2009-04-09 DOI: 10.1109/SIU.2009.5136549

U. Sakarya, Z. Telatar

引用次数: 2

Score matrix optimization for quartz binding peptides using evolutionary strategy 基于进化策略的石英结合肽评分矩阵优化

2009 IEEE 17th Signal Processing and Communications Applications Conference Pub Date : 2009-04-09 DOI: 10.1109/SIU.2009.5136414

Baris Senliol, Z. Cataltepe

{"title":"Score matrix optimization for quartz binding peptides using evolutionary strategy","authors":"Baris Senliol, Z. Cataltepe","doi":"10.1109/SIU.2009.5136414","DOIUrl":"https://doi.org/10.1109/SIU.2009.5136414","url":null,"abstract":"Finding new peptides that can bind to some inorganic materials with high affinity and specificity is an active research problem with many application areas ranging from medicine to electronics. While it is easier to design peptides in-silico, in-vitro testing of binding is a slow and expensive process. Peptides with similar structure usually have similar functions. Score matrices, such as Blosum, PAM and Gonnet are used to score amino acid replacements in alignment algorithms such as Needleman-Wunsch or Smith-Waterman which measure similarity between two sequences. These score matrices may not represent the frequency of amino-acids replacement for experimental data. Score matrices which are optimized for specific peptide class or function have an important effect on accurate classification of artificial or newly discovered peptides. In this paper, score matrices that are specific to quartz binding peptides are derived using an evolutionary strategy (ES) and performance of these matrices are compared with the Quartz I matrix of Oren et.al. (2007). Results show that the matrices which obtained from the ES have better performance than Quartz I matrix when TSS (total similarity score) is used as a performance measurement criterion. Using ES scoring matrices and TSS for classifying peptides as strong, moderate or weak has performed 30% better in terms of accuracy and 40% better in terms of the number of inversions of affinity ordering of peptides than Quartz I matrix.","PeriodicalId":219938,"journal":{"name":"2009 IEEE 17th Signal Processing and Communications Applications Conference","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115238153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Resource allocation for OFDMA systems OFDMA系统的资源分配

2009 IEEE 17th Signal Processing and Communications Applications Conference Pub Date : 2009-04-09 DOI: 10.1109/SIU.2009.5136458

C. Turgu, C. Toker

引用次数: 0

Alignment based extraction of isolated signs from sign language videos 基于对齐的手语视频中孤立符号的提取

2009 IEEE 17th Signal Processing and Communications Applications Conference Pub Date : 2009-04-09 DOI: 10.1109/SIU.2009.5136450

P. Santemiz, O. Aran, M. Saraçlar, L. Akarun

引用次数: 2