S. Bhattacharya, J. Sehgal, Ashish Issac, M. Dutta, Radim Burget, M. Kolarík
{"title":"Computer Vision Method for Grading of Health of a Fundus Image on Basis of Presence of Red Lesions","authors":"S. Bhattacharya, J. Sehgal, Ashish Issac, M. Dutta, Radim Burget, M. Kolarík","doi":"10.1109/TSP.2018.8441504","DOIUrl":"https://doi.org/10.1109/TSP.2018.8441504","url":null,"abstract":"Diabetic Retinopathy is one of those eye diseases which may cause permanent loss of vision if not treated at an early stage. The current paper proposes an algorithmic rule for detection of red lesions and grading the severity of a fundus image depending on its location in the image. Some significant and deciding objects like optic disc and macula are segmented using adaptive intensity-based threshold, geometrical features, k-means clustering and morphological operations. Imaging techniques like color normalization, median filtering and morphological operations are used for segmentation of blood vessels and red lesions. Finally, a region-based framework has been used for grading the severity of the disease affecting the patient. The proposed method has achieved an accuracy of 89%. The proposed method has given encouraging results and can be used in development of some devices in this field.","PeriodicalId":383018,"journal":{"name":"2018 41st International Conference on Telecommunications and Signal Processing (TSP)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131782708","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}
Dimitra Bourou, A. Pampouchidou, M. Tsiknakis, K. Marias, P. Simos
{"title":"Video-based Pain Level Assessment: Feature Selection and Inter-Subject Variability Modeling","authors":"Dimitra Bourou, A. Pampouchidou, M. Tsiknakis, K. Marias, P. Simos","doi":"10.1109/TSP.2018.8441252","DOIUrl":"https://doi.org/10.1109/TSP.2018.8441252","url":null,"abstract":"Automatic pain level assessment, based on video features, may provide clinically-relevant, objective measures of pain intensity. In various clinical contexts accurate pain level estimation by health care personnel is challenging. This problem is compounded by considerable inter- and intra-individual variability of both perceived pain levels and of the associated facial expressions, especially at low pain levels. Thus, providing objective video-based indices for pain level assessment is a rather computationally challenging problem. In the present work both geometric and color-based features were extracted. The most informative features were identified with lasso regression, and subject variability was modeled through a generalized linear mixed effects probit model. Video recordings from the Biovid Heat Pain Database were used with the proposed methodology, aiming to classify video samples to five levels of pain. Performance of the proposed model was comparable to the state-of-the-art random forests algorithm despite its relative simplicity and more conservative cross-validation approach adopted.","PeriodicalId":383018,"journal":{"name":"2018 41st International Conference on Telecommunications and Signal Processing (TSP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130810891","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}
{"title":"Current-Mode Square-Rooting Circuit Based on CMOS Translinear","authors":"Natapong Wongprommoon, P. Thongdit, P. Prommee","doi":"10.1109/TSP.2018.8441503","DOIUrl":"https://doi.org/10.1109/TSP.2018.8441503","url":null,"abstract":"In this paper, a new current-mode square-rooting circuit based on translinear principle is proposed. The saturation mode of MOS transistors is used for realizing the proposed circuit with ± 1.5V power supplies. Square-rooting circuit is realized from the translinear type-A and current computation which uses totally eighteen MOS transistors. The circuit has two inputs which one performs as input and another one for a variable gain. Two input positions are similar characteristic which are able to swap generally. The gain of proposed square-rooting can be electronically tuned by bias current. The current output is accurately compared with the ideal square-rooting function. The error at current output is achieved lower than 4%along 150μA of input range. High frequency sinusoidal signal can be operated up to 5MHz. The proposed circuit is suitable for applying in the varieties of analogue signal-processing applications. The simulation results are depicted to confirm the theoretical analysis by using PSpice. Moreover, layout and post layout simulation results are included.","PeriodicalId":383018,"journal":{"name":"2018 41st International Conference on Telecommunications and Signal Processing (TSP)","volume":"29 41","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132707455","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}
{"title":"Depth Estimation and Ray Tracing Model Selection of Buried Utilities on Ground Penetrating Radar Data","authors":"Uri Peer","doi":"10.1109/TSP.2018.8441270","DOIUrl":"https://doi.org/10.1109/TSP.2018.8441270","url":null,"abstract":"When assessing a target depth from a Ground Penetrating Radar (GPR) image, one typically assumes a certain wave propagation model as well as the model parameters (typically the dielectric of the medium). While much work has been conducted on the automatic inference of the model parameters, not much work has been performed testing the validity of the model itself. The work presented here closes this gap for a low-frequency GPR system (350 MHz center frequency). It compares the measurement, taken from known targets at known depths, with different ray propagation models. It also presents a novel method for efficiently estimating the depth of a target without using any knowledge of the medium's wave propagation speed, or even the time of the signal's emission from the transmitter (time zero). Experiments on 26 targets of varying depths showed an averaged estimation error of less than 0.5%, with a standard deviation of 3% using this robust and efficient method.","PeriodicalId":383018,"journal":{"name":"2018 41st International Conference on Telecommunications and Signal Processing (TSP)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131418506","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}
Hakan Alakoca, Seda Ustunbas, Mustafa Namdar, Arif Basgumus, Eylem Erdogan, L. Durak-Ata
{"title":"System Performance of Interference Alignment in MIMO Cognitive Radio Networks Under Interference Leakage","authors":"Hakan Alakoca, Seda Ustunbas, Mustafa Namdar, Arif Basgumus, Eylem Erdogan, L. Durak-Ata","doi":"10.1109/TSP.2018.8441331","DOIUrl":"https://doi.org/10.1109/TSP.2018.8441331","url":null,"abstract":"In this work, we examine the interference alignment performance of a multi-input multi-output (MIMO) cognitive radio (CR) network in the presence of multiple secondary users. In the proposed architecture, it is assumed that linear interference alignment (IA) is used at the primary system to alleviate the interference between primary and secondary networks. Although, linear IA can surpass the interference in CR considerably, interference leakages may occur due to fast fading channel. Herein, we derive the closed form outage probability expression considering the interference leakage occurred in the primary system. The results which are validated with Monte-Carlo simulations show that interference leakages can deteriorate both system performance and diversity gains considerably.","PeriodicalId":383018,"journal":{"name":"2018 41st International Conference on Telecommunications and Signal Processing (TSP)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115986357","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}
{"title":"A Novel Discrete Wavelet Transform based Coherent Optical OFDM System","authors":"A. Güner, A. Özen","doi":"10.1109/TSP.2018.8441430","DOIUrl":"https://doi.org/10.1109/TSP.2018.8441430","url":null,"abstract":"In optical communication, which is an important part of the Radio over Fiber (RoF) systems, coherent optical OFDM (CO-OFDM) systems allow the use of amplitude and phase belong to the light at the same time for data transmission. However, the data transmission speed and distance of the CO-OFDM system are limited by optical channel impairment effects. One of the major disadvantages of CO-OFDM systems is its sensitivity to fiber nonlinearity effects. For this reason, in order to be used the new signal processing techniques efficiently in the receiver, the optical channel information must be estimated and the received signal must be equalized. In this work, different equalizer constructions are investigated and a frequency domain channel equalizer used in the novel DWT-based CO-OFDM system has been proposed. With the simulation studies made, the equalizers were compared and the results were given with different changes. From the obtained simulation results, it is seen that the proposed method provides about 5.5 OSNR gain for 1E-4 BER value.","PeriodicalId":383018,"journal":{"name":"2018 41st International Conference on Telecommunications and Signal Processing (TSP)","volume":"405 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115992860","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}
{"title":"A Real-Time System for Recognition of American Sign Language by using Deep Learning","authors":"M. Taskiran, Mehmet Killioglu, N. Kahraman","doi":"10.1109/TSP.2018.8441304","DOIUrl":"https://doi.org/10.1109/TSP.2018.8441304","url":null,"abstract":"Deaf people use sign languages to communicate with other people in the community. Although the sign language is known to hearing-impaired people due to its widespread use among them, it is not known much by other people. In this article, we have developed a real-time sign language recognition system for people who do not know sign language to communicate easily with hearing-impaired people. The sign language used in this paper is American sign language. In this study, the convolutional neural network was trained by using dataset collected in 2011 by Massey University, Institute of Information and Mathematical Sciences, and 100% test accuracy was obtained. After network training is completed, the network model and network weights are recorded for the real-time system. In the real-time system, the skin color is determined for a certain frame for hand use, and the hand gesture is determined using the convex hull algorithm, and the hand gesture is defined in real-time using the registered neural network model and network weights. The accuracy of the real-time system is 98.05%.","PeriodicalId":383018,"journal":{"name":"2018 41st International Conference on Telecommunications and Signal Processing (TSP)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122132500","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}
{"title":"Synchrosqueezing Transform Based Methodology for Radiometric Identification","authors":"G. Baldini, G. Steri, Raimondo Giuliani","doi":"10.1109/TSP.2018.8441378","DOIUrl":"https://doi.org/10.1109/TSP.2018.8441378","url":null,"abstract":"This paper describes the application of the SynchroSqueezing Transform (SST) to the problem of radiometric identification, which means that wireless devices can be identified and authenticated through their radio frequency emissions. Radiometric identification has been applied to enhance the security of wireless networks based on WiFi or cellular communication standards. In literature, radiometric identification has been performed by feature extraction in the 1D time domain, 1D frequency domain or also in the 2D time-frequency domain. This paper describes the novel application of the 2D SST to the problem of radiometric identification. An experimental data set of Radio Frequency (RF) emissions from 12 wireless devices is used to evaluate the performance of the SST transform in terms of identification accuracy. This paper shows that the identification accuracy obtained using 2D SST is superior to conventional techniques based in the 1D time domain or 1D frequency domain especially in presence of gaussian noise. 1 This work has been partially supported by the European Commission through project SerIoT funded by the European Union H2020 Programme under Grant Agreement No. 780139. The opinions expressed in this paper are those of the authors and do not necessarily reflect the views of the European Commission.","PeriodicalId":383018,"journal":{"name":"2018 41st International Conference on Telecommunications and Signal Processing (TSP)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130015039","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}
A. Maridaki, A. Pampouchidou, K. Marias, M. Tsiknakis
{"title":"Machine Learning Techniques for Automatic Depression Assessment","authors":"A. Maridaki, A. Pampouchidou, K. Marias, M. Tsiknakis","doi":"10.1109/TSP.2018.8441422","DOIUrl":"https://doi.org/10.1109/TSP.2018.8441422","url":null,"abstract":"Depression is one of the most common mood disorder that is inherently related to emotions, involving bad mood, low self-esteem and loss of interest in normal pleasurable activities. The aim of this work is to develop a framework based on the dataset provided by AVEC'14 for depression assessment. The proposed work presents two different motion representation methods: a) Gabor Motion History Image (GMHI), and b) Motion History Image (MHI). Several combinations of appearance-based low level features are extracted from both motion representations. These features were further combined with statistically derived features, and used for training and testing with several machine learning techniques. The proposed approach reached an F1 score of 81.93%, both for MHI and GMHI, with SVM classifier. The achieved performance is comparable to state-of-the-art approaches, while manages to outperform several others. Apart from accomplishing a competitive performance, the proposed work provides an exhaustive exploration of different combinations of the investigated motion representations, descriptors, and classifiers.","PeriodicalId":383018,"journal":{"name":"2018 41st International Conference on Telecommunications and Signal Processing (TSP)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130733923","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}
{"title":"Modification of Tracking Algorithm Struck by the Application of the Scale Estimation Method","authors":"V. Pavlov, S. Zavjalov, S. Volvenko, M. A. Zanina","doi":"10.1109/TSP.2018.8441458","DOIUrl":"https://doi.org/10.1109/TSP.2018.8441458","url":null,"abstract":"The article considers work of visual object tracking algorithm “Struck”, scales estimation algorithm based on the correlation filter and their cooperative work. The results of the experiments showed that the combination of these algorithms allows achievement of gain in precision of visual object tracking in different variations of sizes of tracked object, compared to the original version of “Struck”. The average gain is equal from 30% and depends on the number of scales in tested video sequences. The features of these sequences: increasing and decreasing of object sizes in 3 - 30 times. The localization accuracy of the object degrades the accuracy of the estimation of the object size. Performance is decreased by 5 - 8 frames per second on averages in comparison to the original algorithm of the “Struck”. However, our proposed method provides real-time working.","PeriodicalId":383018,"journal":{"name":"2018 41st International Conference on Telecommunications and Signal Processing (TSP)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132155536","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}