发布求助
文献互助 智能选刊 最新文献

2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP)最新文献

筛选
英文 中文
Comparison among iterative algorithms for phase retrieval 相位检索迭代算法的比较
2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2010-07-26 DOI: 10.5220/0002980801120117
Wooshik Kim
{"title":"Comparison among iterative algorithms for phase retrieval","authors":"Wooshik Kim","doi":"10.5220/0002980801120117","DOIUrl":"https://doi.org/10.5220/0002980801120117","url":null,"abstract":"Phase retrieval problem is a problem of reconstructing a signal or the phase of Fourier transform of the signal from the magnitude of its Fourier transform. In this paper we address the problem of reconstructing an unknown signal from the magnitude of its Fourier transform and the magnitude of Fourier transform of another signal that is given by the addition of a known reference signal. In addition to a brief summary of the uniqueness conditions under which a signal can be uniquely specified from the given information, we present a simple justification that an iterative algorithm converges to the unknown original signal. And we compare three of the iterative algorithms developed so far.","PeriodicalId":408116,"journal":{"name":"2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"190 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133390330","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: 1
Searching optimal sigma parameter in Radial Basis Kernel Support Vector Machine for classification of HIV sub-type viruses 在径向基核支持向量机中寻找最优sigma参数用于HIV亚型病毒分类
2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2010-07-26 DOI: 10.5220/0002998101630166
Zeyneb Kurt, O. Yavuz
{"title":"Searching optimal sigma parameter in Radial Basis Kernel Support Vector Machine for classification of HIV sub-type viruses","authors":"Zeyneb Kurt, O. Yavuz","doi":"10.5220/0002998101630166","DOIUrl":"https://doi.org/10.5220/0002998101630166","url":null,"abstract":"We propose intelligent methods to classify two different HIV virus types, i.e., R5X4 and R5 or X4 with low computational complexity. Since R5X5 virus has same the features of R5 and X4 viruses, diagnosis of R5X4 can not be determined easily. In this study, the statistical data of R5X4, R5 and X4 was obtained by accessible residues and modelled by Auto-regressive (AR) model. After that the pre-processed data was used for determining the optimal σ value in Radial Basis Kernel of Support Vector Machine (SVM).","PeriodicalId":408116,"journal":{"name":"2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123833351","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
A comparative analysis of time-frequency decompositions in polyphonic pitch estimation 复调音高估计中时频分解的比较分析
2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2010-07-26 DOI: 10.5220/0002955601450150
F. Canadas-Quesada, P. Vera-Candeas, N. Ruiz-Reyes, J. Carabias-Orti, P. C. Molero, F. Rodriguez
{"title":"A comparative analysis of time-frequency decompositions in polyphonic pitch estimation","authors":"F. Canadas-Quesada, P. Vera-Candeas, N. Ruiz-Reyes, J. Carabias-Orti, P. C. Molero, F. Rodriguez","doi":"10.5220/0002955601450150","DOIUrl":"https://doi.org/10.5220/0002955601450150","url":null,"abstract":"In a monaural polyphonic music context, time-frequency information used by most of the multiple fundamental frequency estimation systems, extracted from temporal-domain of the polyphonic signal, is mainly computed using fixed-resolution or variable resolution time-frequency decompositions. This time-frequency information is crucial in the polyphonic estimation process because it must clearly represent all useful information in order to find the set of active pitches. In this paper, we present a preliminary study analyzing two different decompositions, Constant Q Transform and Short Time Fourier Transform, which are integrated in the same multiple fundamental frequency estimation system, with the aim of determining what decomposition is more suitable for polyphonic musical signal analysis and how each of them influences in the accuracy results of the polyphonic estimation considering low-middle-high frequency evaluation.","PeriodicalId":408116,"journal":{"name":"2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"202 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124296378","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
A two-phase pre-filtering approach to the automatic screening of digital fundus images 数字眼底图像自动筛选的两阶段预滤波方法
2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2010-07-26 DOI: 10.5220/0002988101550158
B. Antal, A. Hajdu, A. Csutak, Tünde Petö
{"title":"A two-phase pre-filtering approach to the automatic screening of digital fundus images","authors":"B. Antal, A. Hajdu, A. Csutak, Tünde Petö","doi":"10.5220/0002988101550158","DOIUrl":"https://doi.org/10.5220/0002988101550158","url":null,"abstract":"In this paper, we present an approach to decrease the computational burden of an automatic screening system designed for diabetic retinopathy. The proposed method consists of two steps. First, a pre-screening algorithm is considered to classify the input digital fundus images based on their abnormality. If an image is found to be abnormal, it will not be analyzed further with robust lesion detector algorithms. As an improvement, we introduce a novel feature extraction approach based on clinical observations. The second step of the proposed method detects regions which contain possible lesions for images that have been passed pre-screening. These regions will serve as inputs to lesion detectors later on, which can achieve better computational performance by operating on specific regions only instead of the entire image. Experimental results show that both two steps of the proposed approach are valid to efficiently exclude a large amount of data from further processing to improve the performance of an automatic screening system.","PeriodicalId":408116,"journal":{"name":"2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116774000","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: 1
Design of allpass filters with specified degrees of flatness and equiripple phase responses 具有特定平坦度和等纹相位响应的全通滤波器的设计
2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2010-07-26 DOI: 10.5220/0002934102050210
Xi Zhang
{"title":"Design of allpass filters with specified degrees of flatness and equiripple phase responses","authors":"Xi Zhang","doi":"10.5220/0002934102050210","DOIUrl":"https://doi.org/10.5220/0002934102050210","url":null,"abstract":"This paper proposes a new method for designing allpass filters having the specified degrees of flatness at the specified frequency point(s) and equiripple phase responses in the approximation band(s). First, a system of linear equations are derived from the flatness conditions. Then, the Remez exchange algorithm is used to approximate the equiripple phase responses in the approximation band(s). By incorporating the linear equations from the flatness conditions into the equiripple approximation, the design problem is formulated as a generalized eigenvalue problem. Therefore, we can solve the eigenvalue problem to obtain the filter coefficients, which have the equiripple phase response and satisfy the specified degrees of flatness simultaneously. Furthermore, a class of IIR filters composed of allpass filters are introduced as one of its applications, and it is shown that IIR filters with flat passband (or stopband) and equiripple stopband (or passband) can be designed by using the proposed method. Finally, some examples are presented to demonstrate the effectiveness of the proposed design method.","PeriodicalId":408116,"journal":{"name":"2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127045089","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
Efficient 3D data compression through parameterization of free-form surface patches 有效的三维数据压缩通过参数化的自由形式的表面补丁
2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2010-07-26 DOI: 10.5220/0003033801300135
M. Rodrigues, A. Robinson, Abdulsslam Osman
{"title":"Efficient 3D data compression through parameterization of free-form surface patches","authors":"M. Rodrigues, A. Robinson, Abdulsslam Osman","doi":"10.5220/0003033801300135","DOIUrl":"https://doi.org/10.5220/0003033801300135","url":null,"abstract":"This paper presents a new method for 3D data compression based on parameterization of surface patches. The technique is applied to data that can be defined as single valued functions; this is the case for 3D patches obtained using standard 3D scanners. The method defines a number of mesh cutting planes and the intersection of planes on the mesh defines a set of sampling points. These points contain an explicit structure that allows us to define parametrically both x and y coordinates. The z values are interpolated using high degree polynomials and results show that compressions over 99% are achieved while preserving the quality of the mesh.","PeriodicalId":408116,"journal":{"name":"2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121225527","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: 15
Matching pursuits based on perceptual distortion minimization for sinusoidal audio modelling 基于感知失真最小化的正弦音频建模匹配追踪
2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2010-07-26 DOI: 10.5220/0002917300970102
N. Ruiz-Reyes, P. Vera-Candeas, F. Canadas-Quesada, J. Carabias-Orti, P. C. Molero, F. Rodriguez
{"title":"Matching pursuits based on perceptual distortion minimization for sinusoidal audio modelling","authors":"N. Ruiz-Reyes, P. Vera-Candeas, F. Canadas-Quesada, J. Carabias-Orti, P. C. Molero, F. Rodriguez","doi":"10.5220/0002917300970102","DOIUrl":"https://doi.org/10.5220/0002917300970102","url":null,"abstract":"In this paper, we propose an improved sinusoidal audio modeling method for perceptual matching pursuits driven by a perceptual distortion measure. A linear model derived from the effective signal processing in the ear is used for computing the perceptual distortion measure. This distortion measure allows us to select the most perceptually meaningful sinusoid at each iteration of the pursuit. Furthermore, the distortion measure can be used to define a psychoacoustic stopping criterion for the matching pursuit algorithm. The proposed sinusoidal modelingmethod is designed to be used in sinusoidal audio coding. Ourmethod provides significant advantages regarding previous works because it achieves a better separation between tones and noise, as can be seen in results.","PeriodicalId":408116,"journal":{"name":"2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125389348","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
New weighted prediction architecture for coding scenes with various fading effects image and video processing 一种新的加权预测结构，用于各种衰落效果场景的编码和视频处理
2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2010-07-26 DOI: 10.5220/0002984501180123
Sik-Ho Tsang, Yui-Lam Chan, W. Siu
{"title":"New weighted prediction architecture for coding scenes with various fading effects image and video processing","authors":"Sik-Ho Tsang, Yui-Lam Chan, W. Siu","doi":"10.5220/0002984501180123","DOIUrl":"https://doi.org/10.5220/0002984501180123","url":null,"abstract":"Weighted prediction (WP) is one of the new tools in H.264 for encoding scenes with brightness variations. However, a single WP model does not handle all types of brightness variations. Also, large luminance difference induced by object motions would mislead an encoder in its use of WP which results in low coding efficiency. To solve these problems, a picture-based multi-pass encoding strategy, which extensively encodes the same picture multiple times with different WP models and selects the model with the minimum rate-distortion cost, has been adopted in H.264 to obtain better coding performance. However, computational complexity is impractically high. In this paper, a new WP referencing architecture is proposed to facilitate the use of multiple WP models by making a new arrangement of multiple frame buffers in multiple reference frame motion estimation. Experimental results show that the proposed scheme can improve prediction in scenes with different types of brightness variations and considerable luminance difference induced by motions within the same sequence.","PeriodicalId":408116,"journal":{"name":"2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121994899","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: 2
Data reuse in two-level hierarchical motion estimation for high resolution video coding 高分辨率视频编码中两级分层运动估计的数据重用
2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2010-07-26 DOI: 10.5220/0002991801590162
M. Jakubowski, G. Pastuszak
{"title":"Data reuse in two-level hierarchical motion estimation for high resolution video coding","authors":"M. Jakubowski, G. Pastuszak","doi":"10.5220/0002991801590162","DOIUrl":"https://doi.org/10.5220/0002991801590162","url":null,"abstract":"In hardware implementation of a video coding system memory access becomes a critical issue and the motion estimation (ME) module is the one which consumes most of the data access. To meet the requirements of HD specification, conventional data reuse schemes are not sufficient. In this paper, the hierarchical approach to ME is combined with the Level C and D data reuse schemes. Proposed two-level hierarchical ME algorithm reduces the external memory bandwidth by 77% and the on-chip memory size by 93% with reference to the Level C scheme, and computational complexity by over 99% with reference to the one-level full search (OLFS), achieving the results close to OLFS.","PeriodicalId":408116,"journal":{"name":"2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122469792","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
Desktop supercomputing technology for shadow correction of color images 彩色图像阴影校正的桌面超级计算技术
2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2010-07-26 DOI: 10.5220/0002992101240129
A. Nikonorov, Sergei Bibikov, V. Fursov
{"title":"Desktop supercomputing technology for shadow correction of color images","authors":"A. Nikonorov, Sergei Bibikov, V. Fursov","doi":"10.5220/0002992101240129","DOIUrl":"https://doi.org/10.5220/0002992101240129","url":null,"abstract":"The paper deals with information technology for correction of shadow artifacts on color digital images obtained by photographing of paintings with the purpose of their reproduction. Shadow artifacts are caused by differences of light intensity. The problem of shadow detection and subsequent color correction is solved. The architecture of heterogeneous CPU/GPU - system implementing the elaborated technology is considered, examples of real images processing are given.","PeriodicalId":408116,"journal":{"name":"2010 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128094187","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: 5
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信