Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555)最新文献_第8页

Parallel implementation for image rotation using parallel virtual machine (PVM) 使用并行虚拟机(PVM)并行实现图像旋转

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933631

J. Hinks, S. Amin

{"title":"Parallel implementation for image rotation using parallel virtual machine (PVM)","authors":"J. Hinks, S. Amin","doi":"10.1109/CCECE.2001.933631","DOIUrl":"https://doi.org/10.1109/CCECE.2001.933631","url":null,"abstract":"Many image processing algorithms are particularly suited to distributed computing because these images are difficult and time consuming to analyse. Furthermore, existing algorithms contain explicit parallelism, which can be efficiently exploited by processing arrays. A good example of an image processing operation is the geometric rotation of a rectangular bitmap. This paper shows how this can be implemented on a distributed system using a parallel virtual machine, by splitting images into number of parts and sending each to a separate computing node. Each node performs a rotation on its partial image before returning it to the master node to be recombined in a single image. A variety of image sizes and number of distributed computing nodes were used to determine the efficiency of this technique, and whether it offers enough speed improvement to justify its complexity. Whilst rotating large images benefited enormously using this algorithm, small images rotated more slowly than they would have done on a single processor. This is of particular importance in the case of large digital images, which may consist of millions of pixels.","PeriodicalId":184523,"journal":{"name":"Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114480960","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

20 GHz ultra-short optical pulse source generated by DFB-LD and pulse compression technology 采用DFB-LD和脉冲压缩技术产生的20 GHz超短光脉冲源

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933728

J. Dai, Xiaohong Ma, Jinlong Yu, E. Yang

引用次数: 0

The use of conceptual models during the design of new telecommunication services 在设计新的电信服务时概念模型的使用

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933606

A. Roshannejad, A. Eberlein

引用次数: 2

Efficient recognition of continuously-spoken numbers 有效识别连续说出的数字

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933735

D. O'Shaughnessy, M. Gabrea

{"title":"Efficient recognition of continuously-spoken numbers","authors":"D. O'Shaughnessy, M. Gabrea","doi":"10.1109/CCECE.2001.933735","DOIUrl":"https://doi.org/10.1109/CCECE.2001.933735","url":null,"abstract":"Automatic recognition of continuously-spoken numbers (e.g., telephone or credit card digit sequences) is possible with excellent accuracy, even in applications using telephone lines and serving a large population. However, even such simple recognition tasks suffer decreased performance in adverse conditions, e.g., significant background noise or fading on portable telephone channels. If we further impose significant limitations on the computing resources for the recognition task, then robust efficient speech recognition is still a significant challenge, even for a vocabulary as simple as the digits. Since connected-digit recognition over telephone lines has very practical applications. The amount of computer resources needed for a given level of recognition accuracy is investigated. Rather than use a traditional hidden Markov model approach with cepstral analysis, which is computationally intensive and does not always work well under adverse acoustic conditions, a simpler spectral analysis is used, combined with a segmental approach. The restricted nature of the digit vocabulary allows this simpler approach. High recognition accuracy can be maintained despite a large decrease in both memory and computation.","PeriodicalId":184523,"journal":{"name":"Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121926044","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

On high speed add-compare-select for Viterbi decoders 维特比解码器的高速添加比较选择

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933611

R. Pillai, P. D'Arcy

引用次数: 7

A study of microscopic images of human breast disease using competitive neural networks 利用竞争神经网络研究人类乳腺疾病的显微图像

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933698

R. Allan, W. Kinsner

引用次数: 10

A structured versus unstructured 2D hierarchical mesh for video object motion tracking 用于视频对象运动跟踪的结构化与非结构化二维分层网格

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933570

Wael Badawy

引用次数: 6

Multirate signal estimation 多速率信号估计

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933674

O. Jahromi, B. Francis, R. Kwong

{"title":"Multirate signal estimation","authors":"O. Jahromi, B. Francis, R. Kwong","doi":"10.1109/CCECE.2001.933674","DOIUrl":"https://doi.org/10.1109/CCECE.2001.933674","url":null,"abstract":"This article introduces a technique for estimating samples of a random signal based on observations made by several observers and at different sampling rates. We consider a discrete-time mathematical model where an observer sees the original random signal x(n) through a bank of sensors which we model by linear filters and downsamplers. Each sensor, therefore, outputs a measurement signal v/sub i/(n) whose sampling rate is only a fraction of the sampling rate assumed for the original signal under observation. It is straightforward to show that the optimal least-mean-squares estimator for our problem is a linear operator F operating on v/sub i/(n)s. We observe, however, that to find F we need to know the power spectral density P/sub x/(e/sup jw/) of x(n) which is itself not observable. This motivates us to consider the possibility of estimating P/sub x/(e/sup jw/) using the observable low-rate data. We show that the statistical inference problem which addresses estimation of P/sub x/(e/sup jw/) given certain statistics of v/sub i/(n) is mathematically ill-posed. We resolve this ill-posed inference problem using the principle of maximum entropy. We show, moreover, that the proposed maximum entropy inference technique is a continuous mapping. Therefore, one might safely use it to estimate P/sub x/(e/sup jw/) based on approximate statistics of v/sub i/(n) obtained from the samples.","PeriodicalId":184523,"journal":{"name":"Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132994901","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: 11

Power system adequacy evaluation incorporating a unified power flow controller 采用统一潮流控制器的电力系统充分性评估

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933711

R. Billinton, M. Fotuhi‐Firuzabad, S. Faried, S. Aboreshaid

引用次数: 5

Fast iris detection using neural nets 基于神经网络的快速虹膜检测

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933664

H. El-Bakry

引用次数: 22