发布求助
文献互助 智能选刊 最新文献

Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.最新文献

筛选
英文 中文
An automatic recognition algorithm of analogue modulated signals for disturbance rejection 干扰抑制模拟调制信号的自动识别算法
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224666
Eriko Matsuzaki, K. Ichige, H. Arai
{"title":"An automatic recognition algorithm of analogue modulated signals for disturbance rejection","authors":"Eriko Matsuzaki, K. Ichige, H. Arai","doi":"10.1109/ISSPA.2003.1224666","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224666","url":null,"abstract":"This paper presents an automatic recognition algorithm of analogue modulated signals provided that jamming signals exist near the carrier frequency of a target signal. The proposed algorithm is based on the decision-theoretic approach, is assumed to be used as surveillance system for radiowaves, and can distinguish LSB (lower side band), USB(upper side band), AM (amplitude modulation), and DSB-SC (double side band suppressed carrier). The performance of the proposed algorithm is evaluated through some simulations of modulation recognition.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115294670","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
Weighted subspace fitting of interferometric phases for multibaseline SAR interferometry 多基线SAR干涉相位加权子空间拟合
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224705
A. Jakobsson, F. Lombardini, F. Gini
{"title":"Weighted subspace fitting of interferometric phases for multibaseline SAR interferometry","authors":"A. Jakobsson, F. Lombardini, F. Gini","doi":"10.1109/ISSPA.2003.1224705","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224705","url":null,"abstract":"In this paper, we deal with the problem of exploiting baseline diversity of a multichannel interferometric SAR system to overcome the layover problem. The problem arises when different height contributions collapse in the same range-azimuth resolution cell, due to the presence of strong terrain slopes or discontinuities in the sensed scene. The multilook framework is adopted to counteract the presence of the space varying distortion, termed speckle, which is due to the extended nature of natural targets; to this purpose we introduce a weighted subspace fitting approach to estimate the interferometric phases. Although the approach does not take the speckle into account, it is found to yield estimates superior to previously examined methods.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"460 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115859108","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: 7
Channel rate allocation for error-robust packet transmission of SNR-scalable DPCM-coded video 信噪比可调dpcm编码视频的差错鲁棒分组传输信道速率分配
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224846
Till Halbach, T. Fischer
{"title":"Channel rate allocation for error-robust packet transmission of SNR-scalable DPCM-coded video","authors":"Till Halbach, T. Fischer","doi":"10.1109/ISSPA.2003.1224846","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224846","url":null,"abstract":"An SNR-scalable hybrid video coding scheme with a quality constraint is considered. The encoded digital data are conveyed as packets over an error-prone channel. We derive a low-complexity algorithm which assigns the best code to each packet, based on a limited set of codes, and accounting for channel conditions, code properties, the data's importance, and inter-packet dependencies. A highly error-resilient transmission is hereby achieved, the image quality being equal to approximately high-quality layer SNR for a low error probability (0.002). The quality decrease with degrading channel conditions is only moderate.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123783163","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
A comparative study on source number detection 源数检测的比较研究
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224668
S. Aouada, A. Zoubir, C. See
{"title":"A comparative study on source number detection","authors":"S. Aouada, A. Zoubir, C. See","doi":"10.1109/ISSPA.2003.1224668","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224668","url":null,"abstract":"The problem of source number detection using an array of sensors at the receiver is addressed and a review of the basic detectors is presented. An alternative detection method based on the bootstrap is also summarized and its advantages over the standard detectors are illustrated through simulation examples.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124880755","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: 31
Segmentation-based image compression using BTC-VQ technique 基于分割的BTC-VQ图像压缩技术
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224653
Qosai Kanafani, Azeddine Beghdadi, C. Fookes
{"title":"Segmentation-based image compression using BTC-VQ technique","authors":"Qosai Kanafani, Azeddine Beghdadi, C. Fookes","doi":"10.1109/ISSPA.2003.1224653","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224653","url":null,"abstract":"This paper proposes a new approach to image compression based on image segmentation using the EM algorithm and combined with BTC (block truncation coding) and VQ (vector quantization). The main idea is to decompose the image into homogeneous and nonhomogeneous blocks and then compress them using BTC or VQ. This block classification is achieved using an image segmentation based on the EM (expectation-maximization) algorithm. The use of the EM algorithm results in a good robust segmentation with well behaved boundaries. The segmented image is then used to specify whether BTC or VQ is used to encode a block by assessing if it contains all pixels from a homogeneous or nonhomogeneous region. BTC provides a simple and effective method for coding blocks which contain a lot of information or distinct edges due to its two-level quantizer. However, its lowest attainable bit rate is limited and it often introduces blocking effect in homogeneous regions. VQ on the other hand is more efficient due to a multilevel quantizer and thus results in better compression ratios. However, it does not retain any spatial information about the edges, resulting in stair casing effects. Previous attempts to combine both techniques into a hybrid algorithm only make use of simple measures such as image variance. Results for medical images show that this approach yields significant improvements over traditional BTC or VQ coding when used alone.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122491070","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: 17
Removing water artefacts from 2D protein NMR spectra using GEVD with congruent matrix pencils 使用相同矩阵铅笔的GEVD从二维蛋白质核磁共振光谱中去除水伪影
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224821
K. Stadlthanner, A. Tomé, Fabian J Theis, W. Gronwald, H. Kalbitzer, E. Lang
{"title":"Removing water artefacts from 2D protein NMR spectra using GEVD with congruent matrix pencils","authors":"K. Stadlthanner, A. Tomé, Fabian J Theis, W. Gronwald, H. Kalbitzer, E. Lang","doi":"10.1109/ISSPA.2003.1224821","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224821","url":null,"abstract":"Multidimensional H nmr spectra of biomolecules dissolved in light water are contaminated by an intense water artefact. We discuss the application of the generalized eigenvalue decomposition (GEVD) method using a matrix pencil to explore the time structure of the signals in order to separate out the water artefacts. Simulated as well as experimental 2D NOESY spectra of proteins are studied. Results are compared to those obtained with the FastICA algorithm.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133748714","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
Optimized filter banks for the compression of subtraction angiographic images 优化滤波器组的压缩减法血管造影图像
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224645
Martin Franz, R. Schüffny
{"title":"Optimized filter banks for the compression of subtraction angiographic images","authors":"Martin Franz, R. Schüffny","doi":"10.1109/ISSPA.2003.1224645","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224645","url":null,"abstract":"Several classes of images contain a clearly determined set of basic signals. This permits the development of signal-matched filter banks for image compression. A new approach for the derivation of signal-optimized filter banks using nonlinear optimization is presented here. Filters optimized with respect to the vessel and background signal of angiographic images are provided as a design example. Experimental results show that the new filter bank is competitive with the best biorthogonal wavelets.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132251890","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
Genetic algorithms and multifractal segmentation of cervical cell images 子宫颈细胞图像的遗传算法与多重分形分割
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224800
N. Lassouaoui, L. Hamami
{"title":"Genetic algorithms and multifractal segmentation of cervical cell images","authors":"N. Lassouaoui, L. Hamami","doi":"10.1109/ISSPA.2003.1224800","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224800","url":null,"abstract":"This paper deals with the segmentation problem of cervical cell images. Knowing that the malignity criteria appear on the morphology of the core and the cytoplasm of each cell, then, the goal of this segmentation is to separate each cell on its component, that permits to analyze separately their morphology (size and shape) in the recognition step, for deducing decision about the malignity of each cell. For that, we use a multifractal algorithm based on the computation of the singularity exponent on each point of the image. For increasing the quality of the segmentation, we propose to add an optimization step based on genetic algorithms. The proposed processing has been tested on several images. Herein, we present some results obtained by two cervical cell images.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134211858","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: 24
Attacks on quantization-based watermarking schemes 基于量化的水印方案攻击
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224890
M. Mansour, A. Tewfik
{"title":"Attacks on quantization-based watermarking schemes","authors":"M. Mansour, A. Tewfik","doi":"10.1109/ISSPA.2003.1224890","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224890","url":null,"abstract":"In this work, we introduce an efficient attack for removing the watermark with minimum distortion from quantization-based watermarking schemes. The attack is based on analyzing the quantization error to extract the key parameters of the encoder. The removal of the watermark is done by perturbing enough components of the quantized watermarked signal by half of the estimated quantization step. Simulation experiments show the high effectiveness of the proposed algorithm in hacking known quantization-based schemes for watermarking.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134269357","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: 6
A multi-scale curve smoothing for generalised pattern recognition (MSGPR) 广义模式识别中的多尺度曲线平滑
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224905
K. Kpalma, J. Ronsin
{"title":"A multi-scale curve smoothing for generalised pattern recognition (MSGPR)","authors":"K. Kpalma, J. Ronsin","doi":"10.1109/ISSPA.2003.1224905","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224905","url":null,"abstract":"In this paper, we introduce a new method for pattern characterisation in the context of pattern recognition. This method is based on the analysis of the contour of planar objects like the CSS (curvature scale space) method that uses the maxima of the curvature zero-crossing. The input contour is separated into two signals according to its coordinates x and y which are progressively low-pass filtered by decreasing the filter bandwidth. The output signals are then amplified so that the reconstructed contour and the input one have the same scale. By doing so, we detect the intersection points between both contours and then generate the intersection points map that defines features for pattern recognition. Since this method deals only with curve smoothing, it needs only a convolution operation. This way, one can reasonably hope that this method is faster than the CSS one with equivalent performances.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134511314","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: 6
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