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ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)最新文献

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A novel pitch estimation technique using the Teager energy function 一种基于Teager能量函数的基音估计方法
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.818131
N. Abu-Shikhah, Mohamed Deriche
{"title":"A novel pitch estimation technique using the Teager energy function","authors":"N. Abu-Shikhah, Mohamed Deriche","doi":"10.1109/ISSPA.1999.818131","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.818131","url":null,"abstract":"In speech processing, methods based on glottal closure instances (GCI) for pitch period estimation have proven to give good results. We propose here a new method to estimate the GCIs based on the Teager energy function (TEF). The technique is simple and has a low computational load. The method is based on the peak detection of the TEF for each frame. A smoothing technique is then implemented to pick the right value for the pitch period. Intensive experimental results showed that the proposed technique outperforms both the autocorrelation and cepstral based techniques.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115050678","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: 19
A new skeletonization algorithm based on constrained Delaunay triangulation 一种基于约束Delaunay三角剖分的骨架化算法
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.815823
J. Zou, Hung-Hsin Chang, Hong Yan
{"title":"A new skeletonization algorithm based on constrained Delaunay triangulation","authors":"J. Zou, Hung-Hsin Chang, Hong Yan","doi":"10.1109/ISSPA.1999.815823","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.815823","url":null,"abstract":"A new skeletonization algorithm based on the constrained Delaunay triangulation (CDT) is proposed in this paper. The CDT partitions a shape into a set of nonoverlapping triangles which represent the shape's local symmetry properties and interconnecting relationships between branches. The skeleton of the shape is generated from the skeletons of the triangles. Methods for removing skeletonization artefacts are provided. An outstanding feature of the algorithm is that the structural information at intersections of a shape is preserved in its skeleton.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114596267","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: 8
Robust image compression using the depth-first search on the wavelet zerotree 基于小波零树的深度优先搜索鲁棒图像压缩
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.815792
L. Ang, H. Cheung, K. Eshraghian
{"title":"Robust image compression using the depth-first search on the wavelet zerotree","authors":"L. Ang, H. Cheung, K. Eshraghian","doi":"10.1109/ISSPA.1999.815792","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.815792","url":null,"abstract":"We discuss the error propagation properties of the embedded zerotree wavelet (EZW) algorithm and present an approach using a depth-first search (DFS) representation of the EZW algorithm. We discuss the characteristics of the DFS representation relating to error resistant performance and also perform empirical analysis on the EZW without some of those components that will lead to propagation of errors.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128779871","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
ROI extraction from motion affected MR images by suppression of blurring and motion artifacts in the image background 运动的ROI提取通过抑制图像背景中的模糊和运动伪影来影响MR图像
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.818167
C. Weerasinghe, L. Ji, H. Yan
{"title":"ROI extraction from motion affected MR images by suppression of blurring and motion artifacts in the image background","authors":"C. Weerasinghe, L. Ji, H. Yan","doi":"10.1109/ISSPA.1999.818167","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.818167","url":null,"abstract":"An algorithm is presented for extraction of the region of interest (ROI) enclosed by the outer boundary of the imaged object. Although there are many algorithms presently available for solving segmentation tasks, they can be easily misled by the ghost artifacts and blurring in the background of the image. Therefore, a two step background-clearing algorithm is proposed in this paper. The first step involves selection of the least motion-affected views, using an entropy minimization criterion for suppression of motion induced blurs. The second step involves cancellation of the remaining ghost artifacts, using a fuzzy model. Both these steps tend to increase the number of dark pixels in the image. The contour extraction is performed using an improved active contour model (snake). The proposed method has been applied to spin echo MR images affected by rotational motion, producing good results.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128365556","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
Off-line signature recognition using parameterized Hough transform 基于参数化霍夫变换的离线签名识别
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.818209
T. Kaewkongka, K. Chamnongthai, B. Thipakorn
{"title":"Off-line signature recognition using parameterized Hough transform","authors":"T. Kaewkongka, K. Chamnongthai, B. Thipakorn","doi":"10.1109/ISSPA.1999.818209","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.818209","url":null,"abstract":"This article describes a method of an off-line signature recognition by using the Hough transform to detect stroke lines from the signature image. The Hough transform is used to extract the parameterized Hough space from the signature skeleton as a unique characteristic feature of signatures. In the experiment, the backpropagation neural network is used as a tool to evaluate the performance of the proposed method. The system has been tested with 70 test signatures from different persons. The experimental results reveal a recognition rate 95.24%.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124767713","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: 46
Applications of data hiding in digital images 数字图像中数据隐藏的应用
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.818099
J. Fridrich
{"title":"Applications of data hiding in digital images","authors":"J. Fridrich","doi":"10.1109/ISSPA.1999.818099","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.818099","url":null,"abstract":"Summary form only given, as follows. The author introduces data hiding in digital imagery as a new and powerful technology with applications including robust digital watermarking of images for copyright protection, image fingerprinting and authentication, tamper detection in digital imagery, covert (invisible) communication using images, access control, copy control in DVDs, embedding subtitles and audio tracks in video signals, etc. Data hiding is a highly multidisciplinary field that combines image and signal processing with cryptography, communication theory, coding theory, signal compression, and the theory of visual perception.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130422914","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: 125
The application of median based estimators in robust adaptive beamforming for high frequency radar 基于中值估计在高频雷达鲁棒自适应波束形成中的应用
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.815724
J. Li, M. Turley
{"title":"The application of median based estimators in robust adaptive beamforming for high frequency radar","authors":"J. Li, M. Turley","doi":"10.1109/ISSPA.1999.815724","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.815724","url":null,"abstract":"If adaptive beamforming is applied prior to Doppler processing in the radar sweep domain, weight jitters which occur as a result of the adaptation process will reduce sweep coherence and cause mismatched Doppler processing. If some sweeps of the radar signal are corrupted by directional interference of an impulsive nature, it is shown that the performance of the block adaptation approach can be improved by the application of median based estimators in selecting the weights for a beam from intermediate sweeps. This paper introduces the method for attenuating impulsive directional interference while avoiding weight jitters.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126666033","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
Using sources of opportunity to estimate digital compensation for receiver mismatch in HF arrays 利用机会源估计高频阵列接收机失配的数字补偿
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.815806
G. Fabrizio, D. Gray, M. Turley
{"title":"Using sources of opportunity to estimate digital compensation for receiver mismatch in HF arrays","authors":"G. Fabrizio, D. Gray, M. Turley","doi":"10.1109/ISSPA.1999.815806","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.815806","url":null,"abstract":"The spatial processing performance of adaptive sensor arrays is often limited by the non-identical frequency responses of the receivers in the array over the passband of interest, This paper addresses the problem of estimating digital compensation for mismatches between receiver passbands in high frequency (HF) antenna arrays using interference sources of opportunity. A mathematical model of multipath HF interference is developed and an adaptive algorithm based on this model is proposed to estimate the receiver frequency response corrections. The effectiveness of the proposed algorithm is demonstrated and compared against a commonly used adaptive technique and a highly accurate calibration system using experimental data collected by the receiving antenna array of the Jindalee over-the-horizon (OTH) radar.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124068085","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
An analysis of the exponentiated gradient descent algorithm 指数梯度下降算法的分析
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.818191
S. I. Hill, R. C. Williamson
{"title":"An analysis of the exponentiated gradient descent algorithm","authors":"S. I. Hill, R. C. Williamson","doi":"10.1109/ISSPA.1999.818191","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.818191","url":null,"abstract":"This paper analyses three algorithms previously studied in the computational learning theory community: the gradient descent (GD) algorithm, the exponentiated gradient algorithm with positive and negative weights (EG/spl plusmn/ algorithm) and the exponentiated gradient algorithm with unnormalised positive and negative weights (EGU/spl plusmn/ algorithm). The analysis is of the form used in the signal processing community and is in terms of the mean square error. A relationship between the learning rate and the mean squared error (MSE) of predictions is found for the family of algorithms. Trials involving simulated acoustic echo cancellation are conducted whereby learning rates for the algorithms are selected such that they converge to the same steady state MSE. These trials demonstrate that, in the case that the target is sparse, the EG/spl plusmn/ algorithm typically converges more quickly than the GD or EGU/spl plusmn/ algorithms which perform very similarly.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121779652","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: 4
An image processing approach for estimating the number of live prawn larvae in water 一种估计水中活虾幼虫数量的图像处理方法
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.815737
W. Boles, S. Geva, Andrew Busch
{"title":"An image processing approach for estimating the number of live prawn larvae in water","authors":"W. Boles, S. Geva, Andrew Busch","doi":"10.1109/ISSPA.1999.815737","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.815737","url":null,"abstract":"We address the problem of accurate estimation of prawn larvae numbers in small water-filled containers using image processing techniques. Images of the containers are captured from sampled video signals of a camera suspended over the containers. The images are preprocessed for noise removal and enhancement. The resulting images are then processed to estimate the number of prawn larvae with an acceptable accuracy. Our preliminary results show that estimates of prawn larvae numbers with accuracy of between 90-95% are achievable under controlled conditions. Some issues of system development and practical implementation are discussed.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134188251","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
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