Pub Date : 2007-10-01DOI: 10.1109/WISP.2007.4447491
P. Brox, I. Baturone, S. Sánchez-Solano
A new motion adaptive algorithm for de-interlacing video is proposed in this paper. It employs two fuzzy systems to interpolate the missing lines of the transmission. One fuzzy system is used to evaluate the motion level at the current pixel, and a second one selects the most adequate temporal interpolation method. The combination of both systems provides an effective result with a low cost in term of hardware resources.
{"title":"A Fuzzy Motion Adaptive De-interlacing Algorithm Capable of Detecting Field Repetition Patterns","authors":"P. Brox, I. Baturone, S. Sánchez-Solano","doi":"10.1109/WISP.2007.4447491","DOIUrl":"https://doi.org/10.1109/WISP.2007.4447491","url":null,"abstract":"A new motion adaptive algorithm for de-interlacing video is proposed in this paper. It employs two fuzzy systems to interpolate the missing lines of the transmission. One fuzzy system is used to evaluate the motion level at the current pixel, and a second one selects the most adequate temporal interpolation method. The combination of both systems provides an effective result with a low cost in term of hardware resources.","PeriodicalId":164902,"journal":{"name":"2007 IEEE International Symposium on Intelligent Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129707464","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 : 2007-10-01DOI: 10.1109/WISP.2007.4447543
Marcos del Toro Peral, Fernando Gomez Bravo, Alberto MartinhoVale
Within the probabilistic methods for the state estimation of a dynamic system, the particle filter approach is an innovative technique which is focusing the attention of current researches. Particle filtering succeeds in applying to different type of systems (linear and non-linear) and noise models. This paper presents a comparison between the results obtained using the particle Filter and the Kalman Filter for estimating the orientation and velocity of a DC motor. Real experiments are also presented.
{"title":"State Variables Estimation Using Particle Filter: Experimental Comparison with Kalman Filter","authors":"Marcos del Toro Peral, Fernando Gomez Bravo, Alberto MartinhoVale","doi":"10.1109/WISP.2007.4447543","DOIUrl":"https://doi.org/10.1109/WISP.2007.4447543","url":null,"abstract":"Within the probabilistic methods for the state estimation of a dynamic system, the particle filter approach is an innovative technique which is focusing the attention of current researches. Particle filtering succeeds in applying to different type of systems (linear and non-linear) and noise models. This paper presents a comparison between the results obtained using the particle Filter and the Kalman Filter for estimating the orientation and velocity of a DC motor. Real experiments are also presented.","PeriodicalId":164902,"journal":{"name":"2007 IEEE International Symposium on Intelligent Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129845994","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 : 2007-10-01DOI: 10.1109/WISP.2007.4447574
P. Donato, D. Carrica, S. Gonzalez, R. Petrocelli
Complementary pairs of sequences (Golay sequences) are currently being applied to multiple fields of engineering. This paper describes the way in which to combine these sequences with other sequences of different length in the same physical transmission channel by generating pairs of sequences which are not Golay but are orthogonal to them. This new set of sequence pairs can be efficiently generated, thereby rendering their implementation suitable for logic devices. The possibility of attaining a combined use of sequences of different lengths, with no interference between them, in the same application will be demonstrated, so allowing the use of each sequence for different purposes. This technique offers a wide range of uses, especially among them, in communications, transmission channel identification and multisensor arrays.
{"title":"Combined use of complementary pairs of sequences with orthogonal sequences of different length","authors":"P. Donato, D. Carrica, S. Gonzalez, R. Petrocelli","doi":"10.1109/WISP.2007.4447574","DOIUrl":"https://doi.org/10.1109/WISP.2007.4447574","url":null,"abstract":"Complementary pairs of sequences (Golay sequences) are currently being applied to multiple fields of engineering. This paper describes the way in which to combine these sequences with other sequences of different length in the same physical transmission channel by generating pairs of sequences which are not Golay but are orthogonal to them. This new set of sequence pairs can be efficiently generated, thereby rendering their implementation suitable for logic devices. The possibility of attaining a combined use of sequences of different lengths, with no interference between them, in the same application will be demonstrated, so allowing the use of each sequence for different purposes. This technique offers a wide range of uses, especially among them, in communications, transmission channel identification and multisensor arrays.","PeriodicalId":164902,"journal":{"name":"2007 IEEE International Symposium on Intelligent Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129667159","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 : 2007-10-01DOI: 10.1109/WISP.2007.4447645
C. Liambas, Constantine Tsouros
We introduce an innovative approach for detecting the region of interest in palmprint identification, from a highly noisy image, using a combinatorial algorithm. The existing research faces some critical issues such as noise, shadows, illumination variance, scars, rings, hand disorientation, disability (missing fingers) and different age group samples. All above inconvenient points are overcome by the proposed technique, in the preprocessing phase of palmprint verification. This is done by filling the hand shape with non overlap disks and by locating the disk with maximum possible radius, which contains the palm with biometric features, such as principal lines and wrinkles. Additionally, a quick process computes the hand orientation. The results in a wide range of test bed images lead to the correct computed disk, even in the worst cases. Finally, a comparison with prior work takes place in order to confirm the performance of the proposed algorithm.
{"title":"An Algorithm for Detecting Hand Orientation and Palmprint Location from a Highly Noisy Image","authors":"C. Liambas, Constantine Tsouros","doi":"10.1109/WISP.2007.4447645","DOIUrl":"https://doi.org/10.1109/WISP.2007.4447645","url":null,"abstract":"We introduce an innovative approach for detecting the region of interest in palmprint identification, from a highly noisy image, using a combinatorial algorithm. The existing research faces some critical issues such as noise, shadows, illumination variance, scars, rings, hand disorientation, disability (missing fingers) and different age group samples. All above inconvenient points are overcome by the proposed technique, in the preprocessing phase of palmprint verification. This is done by filling the hand shape with non overlap disks and by locating the disk with maximum possible radius, which contains the palm with biometric features, such as principal lines and wrinkles. Additionally, a quick process computes the hand orientation. The results in a wide range of test bed images lead to the correct computed disk, even in the worst cases. Finally, a comparison with prior work takes place in order to confirm the performance of the proposed algorithm.","PeriodicalId":164902,"journal":{"name":"2007 IEEE International Symposium on Intelligent Signal Processing","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130632581","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 : 2007-10-01DOI: 10.1109/WISP.2007.4447593
O. Martens, M. Min, H. Trampark, A. Liimets
Modern control-oriented and general-purpose low- cost digital signal processor (DSP) chips include multiple 16-bit pulse-width modulators (PWM), in some cases with enhanced 8- bit part with possibility to adjust the PWM in fractions of the digital clock ("micro-steps"). Such PWM work at clock frequencies of 100 MHz and higher and can be used as a precise digital-to-analog converters (DAC). Such DSP chips also include multichannel (multiplexed) analog-to-digital converter ADC, of up to 12-bits resolution, working at conversion rate of up to 10 MHz. So, combining these resources together, with few extra components, high-performance analog-to-digital conversion is possible. In the current paper possibility of achieving of up to 20-bit resolution and measurement of frequencies of frequencies to tens of kHz or even more - is proposed, investigated and discussed. A PWM is used as the DAC in the compensation feedback path of the total analog-to-digital conversion path.
{"title":"High-performance analogue measurement using internal enhanced PWM and ADC of a DSP-chip","authors":"O. Martens, M. Min, H. Trampark, A. Liimets","doi":"10.1109/WISP.2007.4447593","DOIUrl":"https://doi.org/10.1109/WISP.2007.4447593","url":null,"abstract":"Modern control-oriented and general-purpose low- cost digital signal processor (DSP) chips include multiple 16-bit pulse-width modulators (PWM), in some cases with enhanced 8- bit part with possibility to adjust the PWM in fractions of the digital clock (\"micro-steps\"). Such PWM work at clock frequencies of 100 MHz and higher and can be used as a precise digital-to-analog converters (DAC). Such DSP chips also include multichannel (multiplexed) analog-to-digital converter ADC, of up to 12-bits resolution, working at conversion rate of up to 10 MHz. So, combining these resources together, with few extra components, high-performance analog-to-digital conversion is possible. In the current paper possibility of achieving of up to 20-bit resolution and measurement of frequencies of frequencies to tens of kHz or even more - is proposed, investigated and discussed. A PWM is used as the DAC in the compensation feedback path of the total analog-to-digital conversion path.","PeriodicalId":164902,"journal":{"name":"2007 IEEE International Symposium on Intelligent Signal Processing","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125565733","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 : 2007-10-01DOI: 10.1109/WISP.2007.4447630
A. Vázquez, A. Adán, F. Molina
In this paper we present a structured light projection system based on the projection of a color coded hexagonal array that is able to obtain range images in moving conditions. Unordered codes are allowed in the color pattern which implies that the mean Hamming distance between contiguous codewords of the pattern increases. As a result, code loss circumstances can be efficiently handled and computational cost in the pattern-image code correspondence phase is highly reduced. This range vision system has been integrated in a robotic cell so a 6 DOF manipulator robot can interact on a set of selected points of the moving scene. The experimentation has been performed on medium resolution range images and for slow controlled movements giving promising results.
{"title":"3D Vision System for Robot Interaction in Moving Scenes","authors":"A. Vázquez, A. Adán, F. Molina","doi":"10.1109/WISP.2007.4447630","DOIUrl":"https://doi.org/10.1109/WISP.2007.4447630","url":null,"abstract":"In this paper we present a structured light projection system based on the projection of a color coded hexagonal array that is able to obtain range images in moving conditions. Unordered codes are allowed in the color pattern which implies that the mean Hamming distance between contiguous codewords of the pattern increases. As a result, code loss circumstances can be efficiently handled and computational cost in the pattern-image code correspondence phase is highly reduced. This range vision system has been integrated in a robotic cell so a 6 DOF manipulator robot can interact on a set of selected points of the moving scene. The experimentation has been performed on medium resolution range images and for slow controlled movements giving promising results.","PeriodicalId":164902,"journal":{"name":"2007 IEEE International Symposium on Intelligent Signal Processing","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126298554","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 : 2007-10-01DOI: 10.1109/WISP.2007.4447629
I. F. Mondragon, P. Campoy, J. Correa, L. Mejias
This paper explores the possibilities to use robust object tracking algorithms based on visual model features as generator of visual references for UAV control. A scale invariant feature transform (SIFT) algorithm is used for detecting the salient points at every processed image, then a projective transformation for evaluating the visual references is obtained using a version of the RANSAC algorithm, in which a series of matched key-points pairs that fulfill the transformation equations are selected, rejecting otherwise the corrupted data. The system has been tested using diverse image sequences showing its capability to track objects significantly changed in scale, position, rotation, generating at the same time velocity references to the UAV flight controller. The robustness our approach has also been validated using images taken from real flights showing noise and lighting distortions. The results presented are promising in order to be used as reference generator for the control system.
{"title":"Visual Model Feature Tracking For UAV Control","authors":"I. F. Mondragon, P. Campoy, J. Correa, L. Mejias","doi":"10.1109/WISP.2007.4447629","DOIUrl":"https://doi.org/10.1109/WISP.2007.4447629","url":null,"abstract":"This paper explores the possibilities to use robust object tracking algorithms based on visual model features as generator of visual references for UAV control. A scale invariant feature transform (SIFT) algorithm is used for detecting the salient points at every processed image, then a projective transformation for evaluating the visual references is obtained using a version of the RANSAC algorithm, in which a series of matched key-points pairs that fulfill the transformation equations are selected, rejecting otherwise the corrupted data. The system has been tested using diverse image sequences showing its capability to track objects significantly changed in scale, position, rotation, generating at the same time velocity references to the UAV flight controller. The robustness our approach has also been validated using images taken from real flights showing noise and lighting distortions. The results presented are promising in order to be used as reference generator for the control system.","PeriodicalId":164902,"journal":{"name":"2007 IEEE International Symposium on Intelligent Signal Processing","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114206825","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 : 2007-10-01DOI: 10.1109/WISP.2007.4447537
J. Ferreira, M. Crisostomo, A. Coimbra, David Carnide, Antonio Marto
With this work, it is intended to do the tracking and analysis of the human motion, more specifically the gait. By using computational vision, it has been acquired the trajectories of defined control points in individuals' body, throughout time and space. These results are to be used afterwards in gait specification of biped robots. Several types of movement and the phases that compose a common system of capture and analysis of movement are referenced. Then, methods used in image processing and a description of existing gait types are detailed. Finally, the implemented software is presented and the results analyzed.
{"title":"A Human Gait Analyzer","authors":"J. Ferreira, M. Crisostomo, A. Coimbra, David Carnide, Antonio Marto","doi":"10.1109/WISP.2007.4447537","DOIUrl":"https://doi.org/10.1109/WISP.2007.4447537","url":null,"abstract":"With this work, it is intended to do the tracking and analysis of the human motion, more specifically the gait. By using computational vision, it has been acquired the trajectories of defined control points in individuals' body, throughout time and space. These results are to be used afterwards in gait specification of biped robots. Several types of movement and the phases that compose a common system of capture and analysis of movement are referenced. Then, methods used in image processing and a description of existing gait types are detailed. Finally, the implemented software is presented and the results analyzed.","PeriodicalId":164902,"journal":{"name":"2007 IEEE International Symposium on Intelligent Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131131613","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 : 2007-10-01DOI: 10.1109/WISP.2007.4447508
J. M. Villadangos, J. Urea, M. Mazo, A. Hernández, C. De Marziani, M.C. Perez, F. Álvarez, J.J. Garcia, A. Jiménez, I. Gude
This work describes the design of a ultrasonic local positioning system (ULPS) with large covered area. The beacons have been designed with a cylindrical PVDF transducer (piezofilm transducer) to which a conical reflector has been connected to enlarge the covered area and to guarantee 3D indoor positioning. The proposed ULPS for mobile robots (MR) uses simultaneous emissions from ultrasonic beacons. In order to solve the problem of simultaneous emissions from ultrasonic beacons, the well-known technique, direct sequence code multiple division access (DS-CDMA), is used. This technique encodes the ultrasonic signal with a 255-bit Kasami code for every beacon. It implies the emitted signal by every beacon to have a wide bandwidth. PVDF-based transducers suitably guarantee this requirement. Their cylindrical or semi-cylindrical shape makes the emission pattern not suitable when using them as ultrasonic beacons, often located in the ceiling of an indoor room. To adapt the emission pattern and to increase the covered area in the ground, the design process of a conical reflector is described.
{"title":"Ultrasonic Local Positioning System with Large Covered Area","authors":"J. M. Villadangos, J. Urea, M. Mazo, A. Hernández, C. De Marziani, M.C. Perez, F. Álvarez, J.J. Garcia, A. Jiménez, I. Gude","doi":"10.1109/WISP.2007.4447508","DOIUrl":"https://doi.org/10.1109/WISP.2007.4447508","url":null,"abstract":"This work describes the design of a ultrasonic local positioning system (ULPS) with large covered area. The beacons have been designed with a cylindrical PVDF transducer (piezofilm transducer) to which a conical reflector has been connected to enlarge the covered area and to guarantee 3D indoor positioning. The proposed ULPS for mobile robots (MR) uses simultaneous emissions from ultrasonic beacons. In order to solve the problem of simultaneous emissions from ultrasonic beacons, the well-known technique, direct sequence code multiple division access (DS-CDMA), is used. This technique encodes the ultrasonic signal with a 255-bit Kasami code for every beacon. It implies the emitted signal by every beacon to have a wide bandwidth. PVDF-based transducers suitably guarantee this requirement. Their cylindrical or semi-cylindrical shape makes the emission pattern not suitable when using them as ultrasonic beacons, often located in the ceiling of an indoor room. To adapt the emission pattern and to increase the covered area in the ground, the design process of a conical reflector is described.","PeriodicalId":164902,"journal":{"name":"2007 IEEE International Symposium on Intelligent Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127737483","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 : 2007-10-01DOI: 10.1109/WISP.2007.4447579
J. Svensson, A. Werner
There is currently a paradigm shift taking place in the field of scientific methodology. Methods for the extraction of underlying physics from observations and the falsification/confirmation of scientific hypothesis are undergoing a significant change through the use of a generic approach to inference from observations: so called 'Bayesian' Probability Theory. The first part of this paper will outline and exemplify how this method is changing data analysis in nuclear fusion: How all uncertainties (systematic, statistical and model uncertainties) can be treated in a unified way, and how data analysis methods can be understood and unified through probability theory. The practical advantage here for nuclear fusion experiments is the possibility to utilise this method for a more comprehensive understanding of the internal state of fusion plasmas as inferred from measurements from multiple heterogeneous diagnostics. The second part of the paper will discuss architectural issues relating to the very complex analysis systems that might emerge from a systematic application of this method in large scientific experiments.
{"title":"Large Scale Bayesian Data Analysis for Nuclear Fusion Experiments","authors":"J. Svensson, A. Werner","doi":"10.1109/WISP.2007.4447579","DOIUrl":"https://doi.org/10.1109/WISP.2007.4447579","url":null,"abstract":"There is currently a paradigm shift taking place in the field of scientific methodology. Methods for the extraction of underlying physics from observations and the falsification/confirmation of scientific hypothesis are undergoing a significant change through the use of a generic approach to inference from observations: so called 'Bayesian' Probability Theory. The first part of this paper will outline and exemplify how this method is changing data analysis in nuclear fusion: How all uncertainties (systematic, statistical and model uncertainties) can be treated in a unified way, and how data analysis methods can be understood and unified through probability theory. The practical advantage here for nuclear fusion experiments is the possibility to utilise this method for a more comprehensive understanding of the internal state of fusion plasmas as inferred from measurements from multiple heterogeneous diagnostics. The second part of the paper will discuss architectural issues relating to the very complex analysis systems that might emerge from a systematic application of this method in large scientific experiments.","PeriodicalId":164902,"journal":{"name":"2007 IEEE International Symposium on Intelligent Signal Processing","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132651413","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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