Pub Date : 2011-10-13DOI: 10.1109/TSP.2011.6043705
G. Gavriloaia, M. Gavriloaia
In this paper we proposed an improved method for images filtering with slow time variation obtained from some successive frames of a thermovision camera investigating the heat radiated by human beings. In the first step, a single image is obtained as a result of the mean value evaluation from median filtering of all temporal frames. The standard deviation of each pixel is computed as well. The second stage consisted of a spatial filtering of the image from the first step by using the anisotropic diffusion filtering. New relations for the weighted coefficients of the diffusion matrix were proposed from the local statistic estimators. This method was tested on infrared images of different patients. Both subjective and objective evaluations of a patient image suffering from papillary thyroid cancer showed good performances for improving the signal to noise ratio and location of tumor.
{"title":"Spatiotemporal filtering for medical images from an infrared camera","authors":"G. Gavriloaia, M. Gavriloaia","doi":"10.1109/TSP.2011.6043705","DOIUrl":"https://doi.org/10.1109/TSP.2011.6043705","url":null,"abstract":"In this paper we proposed an improved method for images filtering with slow time variation obtained from some successive frames of a thermovision camera investigating the heat radiated by human beings. In the first step, a single image is obtained as a result of the mean value evaluation from median filtering of all temporal frames. The standard deviation of each pixel is computed as well. The second stage consisted of a spatial filtering of the image from the first step by using the anisotropic diffusion filtering. New relations for the weighted coefficients of the diffusion matrix were proposed from the local statistic estimators. This method was tested on infrared images of different patients. Both subjective and objective evaluations of a patient image suffering from papillary thyroid cancer showed good performances for improving the signal to noise ratio and location of tumor.","PeriodicalId":341695,"journal":{"name":"2011 34th International Conference on Telecommunications and Signal Processing (TSP)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132771741","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}
Pub Date : 2011-10-13DOI: 10.1109/TSP.2011.6043733
J. Kouril
This article deals with the practical verification of the RSSI parameter as a suitable candidate for the radio signal source position tracking in a defined 2D area that uses radiolocation methods. The position information can be used as a control input for controlling the audio signal processing algorithms. For this purpose a tracking system was developed. The article also presents simulations of ideal state for a set of selected positions that are defined by coordinates [X, Y] and the practical positions measuring using designed tracking system. Several measurements were made in different areas with different surface in order to find reliability of calculation methods, also for finding changes in the behavior of computational methods in response to the changes of area.
{"title":"Using RSSI parameter in tracking methods — Practical test","authors":"J. Kouril","doi":"10.1109/TSP.2011.6043733","DOIUrl":"https://doi.org/10.1109/TSP.2011.6043733","url":null,"abstract":"This article deals with the practical verification of the RSSI parameter as a suitable candidate for the radio signal source position tracking in a defined 2D area that uses radiolocation methods. The position information can be used as a control input for controlling the audio signal processing algorithms. For this purpose a tracking system was developed. The article also presents simulations of ideal state for a set of selected positions that are defined by coordinates [X, Y] and the practical positions measuring using designed tracking system. Several measurements were made in different areas with different surface in order to find reliability of calculation methods, also for finding changes in the behavior of computational methods in response to the changes of area.","PeriodicalId":341695,"journal":{"name":"2011 34th International Conference on Telecommunications and Signal Processing (TSP)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121842408","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}
Pub Date : 2011-10-13DOI: 10.1109/TSP.2011.6043663
M. Zukal, P. Cika, Radim Burget
The paper is aimed at the description of different image interest point detectors and their properties. Particularly, the Harris-Laplace detector, the Fast Hessian detector and the Difference of Gaussian detector are described. These algorithms have already been evaluated with respect to common geometrical transformations such as the rotation, the scale change, etc. This paper describes the testing process and the impact of brightness change and histogram equalization on the repeatability of tested detectors. The evaluation has been performed on two different image databases containing altogether four hundred and eighty nine images. The repeatability has been used for the evaluation of the described interest point detectors. The best results have been achieved for the Fast Hessian detector which has proved to be the fastest and also the most robust. The repeatability of the Fast Hessian detector has reached the value of 65.39% after performing the histogram equalization on the Caltech database.
{"title":"Evaluation of interest point detectors for scenes with changing lightening conditions","authors":"M. Zukal, P. Cika, Radim Burget","doi":"10.1109/TSP.2011.6043663","DOIUrl":"https://doi.org/10.1109/TSP.2011.6043663","url":null,"abstract":"The paper is aimed at the description of different image interest point detectors and their properties. Particularly, the Harris-Laplace detector, the Fast Hessian detector and the Difference of Gaussian detector are described. These algorithms have already been evaluated with respect to common geometrical transformations such as the rotation, the scale change, etc. This paper describes the testing process and the impact of brightness change and histogram equalization on the repeatability of tested detectors. The evaluation has been performed on two different image databases containing altogether four hundred and eighty nine images. The repeatability has been used for the evaluation of the described interest point detectors. The best results have been achieved for the Fast Hessian detector which has proved to be the fastest and also the most robust. The repeatability of the Fast Hessian detector has reached the value of 65.39% after performing the histogram equalization on the Caltech database.","PeriodicalId":341695,"journal":{"name":"2011 34th International Conference on Telecommunications and Signal Processing (TSP)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125545069","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}
Pub Date : 2011-10-13DOI: 10.1109/TSP.2011.6043736
T. Misuth, I. Baronak
The paper proposes a method for upper bound estimation of packet loss in VoIP networks. We analyze simple Erlang B model that is used for classic telecommunication networks dimensioning and its possible applicability to modern convergent IP networks. We propose a method to calculate proper input variables for the original Erlang B model based on characteristics of both codec and network link in use. Finally we verify the model results against simulation results obtained from NS2 software.
{"title":"Application of Erlang B model in modern VoIP networks","authors":"T. Misuth, I. Baronak","doi":"10.1109/TSP.2011.6043736","DOIUrl":"https://doi.org/10.1109/TSP.2011.6043736","url":null,"abstract":"The paper proposes a method for upper bound estimation of packet loss in VoIP networks. We analyze simple Erlang B model that is used for classic telecommunication networks dimensioning and its possible applicability to modern convergent IP networks. We propose a method to calculate proper input variables for the original Erlang B model based on characteristics of both codec and network link in use. Finally we verify the model results against simulation results obtained from NS2 software.","PeriodicalId":341695,"journal":{"name":"2011 34th International Conference on Telecommunications and Signal Processing (TSP)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129861666","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}
Pub Date : 2011-10-13DOI: 10.1109/TSP.2011.6043719
U. E. Ayten, M. Sagbas, N. Herencsar, J. Koton
In this study novel floating frequency dependent negative resistor (FDNR), floating inductor (FI), floating capacitor and floating resistor simulator circuit employing two CBTAs and three passive components is proposed. The presented circuit can realize floating FDNR, inductor, capacitor or resistor depending on the passive component selection. Since the passive elements are all grounded, this circuit is suitable for fully integrated circuit design. The circuit does not require any component matching conditions, and it has a good sensitivity performance with respect to tracking errors. Moreover, the proposed FDNR, inductance, capacitor and resistor simulator can be tuned electronically by changing the biasing current of the CBTA or can be controlled through the grounded resistor or capacitor. The proposed floating FDNR simulator circuit is demonstrated by using a PSPICE simulation for 0.25 μm TSMC CMOS technology.
{"title":"Novel floating FDNR, inductor and capacitor simulator using CBTA","authors":"U. E. Ayten, M. Sagbas, N. Herencsar, J. Koton","doi":"10.1109/TSP.2011.6043719","DOIUrl":"https://doi.org/10.1109/TSP.2011.6043719","url":null,"abstract":"In this study novel floating frequency dependent negative resistor (FDNR), floating inductor (FI), floating capacitor and floating resistor simulator circuit employing two CBTAs and three passive components is proposed. The presented circuit can realize floating FDNR, inductor, capacitor or resistor depending on the passive component selection. Since the passive elements are all grounded, this circuit is suitable for fully integrated circuit design. The circuit does not require any component matching conditions, and it has a good sensitivity performance with respect to tracking errors. Moreover, the proposed FDNR, inductance, capacitor and resistor simulator can be tuned electronically by changing the biasing current of the CBTA or can be controlled through the grounded resistor or capacitor. The proposed floating FDNR simulator circuit is demonstrated by using a PSPICE simulation for 0.25 μm TSMC CMOS technology.","PeriodicalId":341695,"journal":{"name":"2011 34th International Conference on Telecommunications and Signal Processing (TSP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129202055","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}
Pub Date : 2011-10-13DOI: 10.1109/TSP.2011.6043670
Dongmei Fu, Tao Yang, Xintao Qiu, K. Říha, Radim Burget
Image segmentation is one of the classic problems in the computer vision field. Although a lot of successful operators and algorithms have been proposed, fuzzy image segmentation does not always achieve satisfactory results. This paper is inspired by Positive Selection Algorithm and Negative Selection Algorithm and, is based on the mechanism and process where T-cell is activated by the MHC molecule. A new positive selection algorithm is introduced which establishes so-called templates set for immune detection. This algorithm is based on processing of image information represented as a gray value statistic rather than arithmetic gradient formulation. It is comprised of a template set not just a single template. Therefore it gives good results for different images. The presented algorithm is used for image segmentation into objects, background and fuzzy edge in fuzzy infrared images.
{"title":"A novel immune image template set for fuzzy image segmentation and its application research","authors":"Dongmei Fu, Tao Yang, Xintao Qiu, K. Říha, Radim Burget","doi":"10.1109/TSP.2011.6043670","DOIUrl":"https://doi.org/10.1109/TSP.2011.6043670","url":null,"abstract":"Image segmentation is one of the classic problems in the computer vision field. Although a lot of successful operators and algorithms have been proposed, fuzzy image segmentation does not always achieve satisfactory results. This paper is inspired by Positive Selection Algorithm and Negative Selection Algorithm and, is based on the mechanism and process where T-cell is activated by the MHC molecule. A new positive selection algorithm is introduced which establishes so-called templates set for immune detection. This algorithm is based on processing of image information represented as a gray value statistic rather than arithmetic gradient formulation. It is comprised of a template set not just a single template. Therefore it gives good results for different images. The presented algorithm is used for image segmentation into objects, background and fuzzy edge in fuzzy infrared images.","PeriodicalId":341695,"journal":{"name":"2011 34th International Conference on Telecommunications and Signal Processing (TSP)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121378165","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}
Pub Date : 2011-10-13DOI: 10.1109/TSP.2011.6043679
Marek Bohrn, L. Fujcik, R. Vrba
This paper describes digital circuit which produce sigma-delta modulated sine waveform. The circuit should be used for measurements, calibrations and reference purposes. The sine waveform is generated using a novel algorithm which results from simple method used to generate sine signal in analogue circuits. The circuit is designed as fully digital and described in VHDL language. The structure of the circuit was implemented and tested in an FPGA chip. Presently the design is being transferred into ASIC utilizing AMIS CMOS 07 technology. After fabrication and testing, some changes and improvements will be done to expand functions and utilization of the generator.
{"title":"Novel on-chip sine wave generator","authors":"Marek Bohrn, L. Fujcik, R. Vrba","doi":"10.1109/TSP.2011.6043679","DOIUrl":"https://doi.org/10.1109/TSP.2011.6043679","url":null,"abstract":"This paper describes digital circuit which produce sigma-delta modulated sine waveform. The circuit should be used for measurements, calibrations and reference purposes. The sine waveform is generated using a novel algorithm which results from simple method used to generate sine signal in analogue circuits. The circuit is designed as fully digital and described in VHDL language. The structure of the circuit was implemented and tested in an FPGA chip. Presently the design is being transferred into ASIC utilizing AMIS CMOS 07 technology. After fabrication and testing, some changes and improvements will be done to expand functions and utilization of the generator.","PeriodicalId":341695,"journal":{"name":"2011 34th International Conference on Telecommunications and Signal Processing (TSP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122399373","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}
Pub Date : 2011-10-13DOI: 10.1109/TSP.2011.6043743
P. Brida, Jozef Benikovsky, Juraj Machaj
The paper deals with performance evaluation of the indoor positioning solution based on utilization of IEEE 802.11 network and fingerprinting method. It is called WifiLOC and it is implemented as a mobile-assisted positioning system. The architecture of the system is presented. WifiLOC is based on the fingerprinting method, which utilizes signal strength information for position estimation. A lot of factors influence the propagation of radio signals in indoor environment. This fact also significantly impacts on properties of the positioning systems. In the paper, the impact of the positioning accuracy is presented various conditions such as moving objects in the observed area or the type of indoor environment, e.g. corridor, office and room, are taken into account. The influence of different conditions during the off-line and the on-line phase of fingerprinting method on the positioning accuracy is also investigated.
{"title":"Performance investigation of WifiLOC positioning system","authors":"P. Brida, Jozef Benikovsky, Juraj Machaj","doi":"10.1109/TSP.2011.6043743","DOIUrl":"https://doi.org/10.1109/TSP.2011.6043743","url":null,"abstract":"The paper deals with performance evaluation of the indoor positioning solution based on utilization of IEEE 802.11 network and fingerprinting method. It is called WifiLOC and it is implemented as a mobile-assisted positioning system. The architecture of the system is presented. WifiLOC is based on the fingerprinting method, which utilizes signal strength information for position estimation. A lot of factors influence the propagation of radio signals in indoor environment. This fact also significantly impacts on properties of the positioning systems. In the paper, the impact of the positioning accuracy is presented various conditions such as moving objects in the observed area or the type of indoor environment, e.g. corridor, office and room, are taken into account. The influence of different conditions during the off-line and the on-line phase of fingerprinting method on the positioning accuracy is also investigated.","PeriodicalId":341695,"journal":{"name":"2011 34th International Conference on Telecommunications and Signal Processing (TSP)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131029139","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}
Pub Date : 2011-10-13DOI: 10.1109/TSP.2011.6043664
J. Prinosil
This paper deals with the proposal of blind face indexing system for real videos with no prior knowledge. The system consists of face and facial features detection and tracking stage and face clustering stage. Viola-Jones object detector for face detection, pictorial structures for facial feature detection and Lucas-Kanade optical flow for facial feature tracking are used. Average face models based on popular SIFT features are applied for face clustering. The system operates well on discussion talks or records of videoconferences.
{"title":"Blind face indexing in video","authors":"J. Prinosil","doi":"10.1109/TSP.2011.6043664","DOIUrl":"https://doi.org/10.1109/TSP.2011.6043664","url":null,"abstract":"This paper deals with the proposal of blind face indexing system for real videos with no prior knowledge. The system consists of face and facial features detection and tracking stage and face clustering stage. Viola-Jones object detector for face detection, pictorial structures for facial feature detection and Lucas-Kanade optical flow for facial feature tracking are used. Average face models based on popular SIFT features are applied for face clustering. The system operates well on discussion talks or records of videoconferences.","PeriodicalId":341695,"journal":{"name":"2011 34th International Conference on Telecommunications and Signal Processing (TSP)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114083440","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}
Pub Date : 2011-10-13DOI: 10.1109/TSP.2011.6043750
D. Bordencea, H. Valean, S. Folea, A. Dobircau
Collecting data from sensors, for various applications and scenarios, is becoming a norm. Each sensor is connected to an Access Point (AP), which forwards the data to a host computer. When an AP fails, it causes all sensors connected to it to be offline for a while. In this paper, an adaptive and fault-tolerant system that continues to function in presence of AP failures and sensor joins (churn) is proposed. As a case study, it is showed how the system can be used to automate a building. The APs have associated software agents that use Paxos protocol to allocate the sensors to APs under churn. Virtual redundancy is implemented via Paxos, thus when an AP fails, its role will be taken by another AP. Hence, it is achieved high reliability by using software agents with wireless sensors, and employing the Paxos protocol, without any component redundancy and with low implementation cost.
{"title":"Agent based system for home automation, monitoring and security","authors":"D. Bordencea, H. Valean, S. Folea, A. Dobircau","doi":"10.1109/TSP.2011.6043750","DOIUrl":"https://doi.org/10.1109/TSP.2011.6043750","url":null,"abstract":"Collecting data from sensors, for various applications and scenarios, is becoming a norm. Each sensor is connected to an Access Point (AP), which forwards the data to a host computer. When an AP fails, it causes all sensors connected to it to be offline for a while. In this paper, an adaptive and fault-tolerant system that continues to function in presence of AP failures and sensor joins (churn) is proposed. As a case study, it is showed how the system can be used to automate a building. The APs have associated software agents that use Paxos protocol to allocate the sensors to APs under churn. Virtual redundancy is implemented via Paxos, thus when an AP fails, its role will be taken by another AP. Hence, it is achieved high reliability by using software agents with wireless sensors, and employing the Paxos protocol, without any component redundancy and with low implementation cost.","PeriodicalId":341695,"journal":{"name":"2011 34th International Conference on Telecommunications and Signal Processing (TSP)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125068570","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}
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