CONATEL 2011最新文献_第2页

BiSpectral contactless hand based biometric system 双光谱非接触式手部生物识别系统

CONATEL 2011 Pub Date : 2011-05-17 DOI: 10.1109/CONATEL.2011.5958660

Miguel A. Ferrer, Francisco Vargas, A. Morales

{"title":"BiSpectral contactless hand based biometric system","authors":"Miguel A. Ferrer, Francisco Vargas, A. Morales","doi":"10.1109/CONATEL.2011.5958660","DOIUrl":"https://doi.org/10.1109/CONATEL.2011.5958660","url":null,"abstract":"This paper presents a contactless hand based biometric identification system using geometric and palm features. Hand images are acquired using two commercial webcams with 1200×1600 pixel resolution which are refered to as the “IR” and “visible” webcams. The IR webcam has been modified by exchanging the IR filter with a visible filter lens and reducing the gain and exposure time to improve the hand contour extraction. The hand was illuminated using 24 infra-red LEDs and 4 white light LEDs. Images acquired from the IR webcam were binarized and the normalized widths from the index to little finger were used as features. A Least Square Support Vector Machine was then used for verification. The palm features were obtained by the Orthogonal Line Ordinal Features approach applied to the image acquired by the visible webcam. The hand image from the visible webcam was segmented using an Active Shape Model guided by the hand contour from the IR webcam as an initial guest. A Hamming distance was used as verifier. More than 8000 hand images from three public databases were used in order to compare the features extraction approaches. A score level fusion of both biometrics is performed obtaining an Equal Error Rate of 0.17% with a proprietary database of 100 users acquired with the proposed device.","PeriodicalId":197632,"journal":{"name":"CONATEL 2011","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129686047","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: 23

Coverage and service testing of Terrestrial television systems: Practical aspects 地面电视系统的覆盖和服务测试:实用方面

CONATEL 2011 Pub Date : 2011-05-17 DOI: 10.1109/CONATEL.2011.5958661

M. Chuchon, M. Quispe, J. Samaniego, Guillermo Kemper, Daniel Diaz

引用次数: 0

Quantum Private Telecommunications: A project at Instituto de Telecomunicações, Portugal 量子私人通信:葡萄牙Telecomunicações研究所的一个项目

CONATEL 2011 Pub Date : 2011-05-17 DOI: 10.1109/CONATEL.2011.5958672

Y. Omar

引用次数: 0

A framework for simulation and evaluation of cross-layer techniques in wireless sensor networks 无线传感器网络中跨层技术的仿真与评估框架

CONATEL 2011 Pub Date : 2011-05-17 DOI: 10.1109/CONATEL.2011.5958656

Danny Múnera, N. Gaviria

引用次数: 3

FR-4 microstrip transmission lines behavior in high frequency range FR-4微带传输线在高频范围内的性能

CONATEL 2011 Pub Date : 2011-05-17 DOI: 10.1109/CONATEL.2011.5958664

Marcelo Ribeiro, Golberi de Salvador Ferreira, H. Sterner

{"title":"FR-4 microstrip transmission lines behavior in high frequency range","authors":"Marcelo Ribeiro, Golberi de Salvador Ferreira, H. Sterner","doi":"10.1109/CONATEL.2011.5958664","DOIUrl":"https://doi.org/10.1109/CONATEL.2011.5958664","url":null,"abstract":"The consequences of the current electronic equipment market demands is causing designers to develop ever faster circuits in ever smaller devices. The miniaturization of circuits together with increased operating speeds shows several functional difficulties, which require skills and knowledge of the designer so that the final product fits into operation standards and can be produced. The objectives of this research are to address the adverse effects on the operation of electronic equipment, demystifying the network of influences present when a circuit is in operation and find methodologies to identify and reduce critical problems on these devices. The study was done on hypothetical printed circuit boards, created specifically to simulate and demonstrate the desired effects. Although hypothetical, part of its settings can be found in commercially produced plates. The results were obtained through numerical models, computational simulations and measurements in physical prototypes. Through these, it was possible to identify critical topologies, asymmetries to be avoided and develop methodologies to avoid adverse problems. Another important point was the validation of theories and the comparison of the results measured in physical prototypes with the results originated by simulation and numerical modeling in order to trace its fidelity with real models.","PeriodicalId":197632,"journal":{"name":"CONATEL 2011","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125439648","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

System for identification and control of arrival of vehicles 车辆到达的识别和控制系统

CONATEL 2011 Pub Date : 2011-05-17 DOI: 10.1109/CONATEL.2011.5958674

Camilo Alexey Suarez Buitrago, Jhon Jairo Ramírez Echeverry

引用次数: 2

A novel fuzzy logic-based metric for audio quality assessment: Objective audio quality assessment 一种新的基于模糊逻辑的音频质量评价方法:客观音频质量评价

CONATEL 2011 Pub Date : 2011-05-17 DOI: 10.1109/CONATEL.2011.5958657

Luis F. Abanto-Leon, Guillermo Kemper Vasquez, J. Telles

{"title":"A novel fuzzy logic-based metric for audio quality assessment: Objective audio quality assessment","authors":"Luis F. Abanto-Leon, Guillermo Kemper Vasquez, J. Telles","doi":"10.1109/CONATEL.2011.5958657","DOIUrl":"https://doi.org/10.1109/CONATEL.2011.5958657","url":null,"abstract":"ITU-R BS.1387 states a method for objective assessment of perceived audio quality. This Recommendation, known also as PEAQ (Perceptual Evaluation of Audio Quality) is based on a psychoacoustic model of the human ear and was standardized by the International Telecommunications Union as an alternative to subjective tests, which are expensive and time-consuming processes. PEAQ combines various physiological and psycho-acoustical properties of the human ear to give a measure of the quality difference between a reference audio and a test audio. The reference audio signal could be considered as a distortion-free source, whereas the test signal is a distorted version of the reference, which may have audible artifacts because of compression. The algorithm computes the Model Output Variables (MOVs) which are mapped to a single quality measure, Objective Difference Grade (ODG), using a three-layer perceptron artificial neural network. The ODG estimates the perceived distortion between both audio signals. In this paper we propose a new metric of low computational complexity called FQI (Fuzzy Quality Index) which is based on Fuzzy Logic reasoning and has been incorporated into the existing PEAQ model to improve its overall performance. Results show that the modified version slightly outperforms PEAQ.","PeriodicalId":197632,"journal":{"name":"CONATEL 2011","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129050772","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 evaluation of power line communication channel modelling for indoor environment application 电力线通信信道模型在室内环境中的应用评价

CONATEL 2011 Pub Date : 2011-05-17 DOI: 10.1109/CONATEL.2011.5958658

H. Zattar, L. Salek, G. Carrijo

引用次数: 7

Internet-based collaborative E-exercisebook system for primary math teaching 基于internet的小学数学协同电子作业本教学系统

CONATEL 2011 Pub Date : 2011-05-17 DOI: 10.1109/CONATEL.2011.5958665

M. Reis, M. Bacelar, Maria G. A. D. Reis, D. Meira, M. Bessa, Emanuel Peres, R. Morais, António Valente, S. Soares, J. Bulas-Cruz

引用次数: 2

Performance analysis of modulation formats for 40 Gb/s optical transmission 40gb /s光传输调制格式的性能分析

CONATEL 2011 Pub Date : 2011-05-17 DOI: 10.1109/CONATEL.2011.5958670

C. R. da Silveira, D. M. Pataca, M. de Lacerda Rocha, M. Romero

引用次数: 2