Pub Date : 2013-12-01DOI: 10.1109/IST.2013.6729660
I. Kostavelis, Evangelos Boukas, L. Nalpantidis, A. Gasteratos
The ability of autonomous robots to precisely compute their spatial coordinates constitutes an important attribute. In this regard, Visual Odometry (VO) becomes a most appropriate tool, in estimating the full pose of a camera, placed onboard a robot by analyzing a sequence of images. The paper at hand proposes an accurate computationally-efficient VO algorithm relying exclusively on stereo vision. A non-iterative outlier detection technique capable of efficiently discarding outliers of matched features is suggested. The developed technique is combined with an incremental motion estimation approach to estimate the robot's trajectory. The accuracy of the proposed system has been evaluated both on simulated data and using a real robotic platform. Experimental results from rough terrain routes show remarkable accuracy with positioning errors as low as 1.1%.
{"title":"Visual Odometry for autonomous robot navigation through efficient outlier rejection","authors":"I. Kostavelis, Evangelos Boukas, L. Nalpantidis, A. Gasteratos","doi":"10.1109/IST.2013.6729660","DOIUrl":"https://doi.org/10.1109/IST.2013.6729660","url":null,"abstract":"The ability of autonomous robots to precisely compute their spatial coordinates constitutes an important attribute. In this regard, Visual Odometry (VO) becomes a most appropriate tool, in estimating the full pose of a camera, placed onboard a robot by analyzing a sequence of images. The paper at hand proposes an accurate computationally-efficient VO algorithm relying exclusively on stereo vision. A non-iterative outlier detection technique capable of efficiently discarding outliers of matched features is suggested. The developed technique is combined with an incremental motion estimation approach to estimate the robot's trajectory. The accuracy of the proposed system has been evaluated both on simulated data and using a real robotic platform. Experimental results from rough terrain routes show remarkable accuracy with positioning errors as low as 1.1%.","PeriodicalId":448698,"journal":{"name":"2013 IEEE International Conference on Imaging Systems and Techniques (IST)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125365116","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 : 2013-12-01DOI: 10.1109/IST.2013.6729669
M. Hossain, G. Lu, Xinli Li, Yong Yan
This paper presents the three-dimensional temperature measurement of an oxy-gas burner flame based on optical tomographic and two-color techniques. Eight two-dimensional (2-D) image projections of the flame are obtained concurrently by multiple imaging fiber bundles and imaging sensors. The LFBP (Logical Filtered Back-Projection) algorithm combined the SART (Simultaneous Algebraic Reconstruction Technique) is utilized to reconstruct the gray-level intensity of the flame based on its 2-D images. The flame temperature distribution is then determined using the reconstructed gray-levels through the two-color pyrometry. Experiments were undertaken under different oxy-fuel conditions. The results show that the flame temperature increases with the O2 concentration and that the temperature distribution of the oxy-fuel flame is more uniform at the root region than that at other regions.
{"title":"Three-dimensional temperature profiling of oxy-gas burner flames","authors":"M. Hossain, G. Lu, Xinli Li, Yong Yan","doi":"10.1109/IST.2013.6729669","DOIUrl":"https://doi.org/10.1109/IST.2013.6729669","url":null,"abstract":"This paper presents the three-dimensional temperature measurement of an oxy-gas burner flame based on optical tomographic and two-color techniques. Eight two-dimensional (2-D) image projections of the flame are obtained concurrently by multiple imaging fiber bundles and imaging sensors. The LFBP (Logical Filtered Back-Projection) algorithm combined the SART (Simultaneous Algebraic Reconstruction Technique) is utilized to reconstruct the gray-level intensity of the flame based on its 2-D images. The flame temperature distribution is then determined using the reconstructed gray-levels through the two-color pyrometry. Experiments were undertaken under different oxy-fuel conditions. The results show that the flame temperature increases with the O2 concentration and that the temperature distribution of the oxy-fuel flame is more uniform at the root region than that at other regions.","PeriodicalId":448698,"journal":{"name":"2013 IEEE International Conference on Imaging Systems and Techniques (IST)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131607236","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 : 2013-10-01DOI: 10.1109/IST.2013.6729684
W. Smolik, P. Wróblewski, J. Szyszko
The paper presents progress in the design and construction of a mini scanner prototype for magnetic particle imaging (MPI). The system consists of two pairs of coils which will enable imaging of only single plane. Numerical modeling was used for selection and drive coils design. The magnetic field was calculated using COMSOL commercial FEM software and using dedicated solver elaborated for MATLAB environment. A setup of coils was built and the magnetic field was measured. The comparison of results is presented. To-date the coils system construction has been completed and signal receiving tests begun.
{"title":"Development of MPI mini scanner prototype - Coils design","authors":"W. Smolik, P. Wróblewski, J. Szyszko","doi":"10.1109/IST.2013.6729684","DOIUrl":"https://doi.org/10.1109/IST.2013.6729684","url":null,"abstract":"The paper presents progress in the design and construction of a mini scanner prototype for magnetic particle imaging (MPI). The system consists of two pairs of coils which will enable imaging of only single plane. Numerical modeling was used for selection and drive coils design. The magnetic field was calculated using COMSOL commercial FEM software and using dedicated solver elaborated for MATLAB environment. A setup of coils was built and the magnetic field was measured. The comparison of results is presented. To-date the coils system construction has been completed and signal receiving tests begun.","PeriodicalId":448698,"journal":{"name":"2013 IEEE International Conference on Imaging Systems and Techniques (IST)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126060421","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 : 2013-10-01DOI: 10.1109/IST.2013.6729680
Xiaobing Dai, Ya Zhou, Xiaoming Hu, M. Liu, Xia Zhu, Zhaoguo Wu
Venipuncture is now a common medical means. Several devices have been developed to aid the paramedics or physicians in locating the vein. There are two problems existing in vein display devices: (1) The vein cannot be shown directly on the skin; (2) The method of displaying the vein on the skin is complex. An approach based on the camera-projector system is proposed to help the paramedics or physicians quickly find the vein for diagnosis and treatment. The proposed approach can solve the two problems and it is easy to be accomplished. A simple system including IR light, an IR camera and a DLP projector is constructed to test and verify this approach. In the experiment, the vein is projected directly on the surface of the skin and the whole process takes only a short period of time. The result of the projection of the vein can meet the requirement of the venipuncture.
{"title":"A fast vein display device based on the camera-projector system","authors":"Xiaobing Dai, Ya Zhou, Xiaoming Hu, M. Liu, Xia Zhu, Zhaoguo Wu","doi":"10.1109/IST.2013.6729680","DOIUrl":"https://doi.org/10.1109/IST.2013.6729680","url":null,"abstract":"Venipuncture is now a common medical means. Several devices have been developed to aid the paramedics or physicians in locating the vein. There are two problems existing in vein display devices: (1) The vein cannot be shown directly on the skin; (2) The method of displaying the vein on the skin is complex. An approach based on the camera-projector system is proposed to help the paramedics or physicians quickly find the vein for diagnosis and treatment. The proposed approach can solve the two problems and it is easy to be accomplished. A simple system including IR light, an IR camera and a DLP projector is constructed to test and verify this approach. In the experiment, the vein is projected directly on the surface of the skin and the whole process takes only a short period of time. The result of the projection of the vein can meet the requirement of the venipuncture.","PeriodicalId":448698,"journal":{"name":"2013 IEEE International Conference on Imaging Systems and Techniques (IST)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125287085","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 : 2013-10-01DOI: 10.1109/IST.2013.6729702
Bin Zhu, Zhengdong Cheng, H. Wang
Kernel function optimization and selection is an open and challenging problem in statistic learning theory and kernel methods research area at present. The existing kernel optimization algorithms usually work in specific application, and it is efficient when used with one kind of kernel function. A kernel optimization and selection algorithm based on cost function maximization is proposed. Compared with present methods, it was applied to different kinds of kernel functions and it integrates kernel optimization and selection. The proposed method is applied to the application of infrared (IR) dim and small target detection based on Kernel RLS (KRLS) algorithm. The validity of the optimization and selection method is demonstrated by experiments.
{"title":"A Kernel function optimization and selection algorithm based on cost function maximization","authors":"Bin Zhu, Zhengdong Cheng, H. Wang","doi":"10.1109/IST.2013.6729702","DOIUrl":"https://doi.org/10.1109/IST.2013.6729702","url":null,"abstract":"Kernel function optimization and selection is an open and challenging problem in statistic learning theory and kernel methods research area at present. The existing kernel optimization algorithms usually work in specific application, and it is efficient when used with one kind of kernel function. A kernel optimization and selection algorithm based on cost function maximization is proposed. Compared with present methods, it was applied to different kinds of kernel functions and it integrates kernel optimization and selection. The proposed method is applied to the application of infrared (IR) dim and small target detection based on Kernel RLS (KRLS) algorithm. The validity of the optimization and selection method is demonstrated by experiments.","PeriodicalId":448698,"journal":{"name":"2013 IEEE International Conference on Imaging Systems and Techniques (IST)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125306463","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 : 2013-10-01DOI: 10.1109/IST.2013.6729653
Yin-wei Li, M. Xiang, Li-deng Wei
Phase gradient autofocus (PGA) is a robust tool for high resolution synthetic aperture radar (SAR) phase estimation and correction under the assumption that some strong scatterers with high signal-to-clutter ratio (SCR) are available within the unfocused image. In this paper, an advanced PGA algorithm is proposed, where the short-time Fourier transform (STFT) firstly is used to estimate the quadratic phase error (QPE) and the PGA is applied with a more effective filtering in the short-time Fourier domain (STFD). The proposed algorithm can relax the limitation on the scene content and achieve well-focused images without iteration. The validity of the proposed algorithm is demonstrated with the experimental results of simulation data and real radar data.
{"title":"Synthetic aperture radar autofocus based on time-frequency transform","authors":"Yin-wei Li, M. Xiang, Li-deng Wei","doi":"10.1109/IST.2013.6729653","DOIUrl":"https://doi.org/10.1109/IST.2013.6729653","url":null,"abstract":"Phase gradient autofocus (PGA) is a robust tool for high resolution synthetic aperture radar (SAR) phase estimation and correction under the assumption that some strong scatterers with high signal-to-clutter ratio (SCR) are available within the unfocused image. In this paper, an advanced PGA algorithm is proposed, where the short-time Fourier transform (STFT) firstly is used to estimate the quadratic phase error (QPE) and the PGA is applied with a more effective filtering in the short-time Fourier domain (STFD). The proposed algorithm can relax the limitation on the scene content and achieve well-focused images without iteration. The validity of the proposed algorithm is demonstrated with the experimental results of simulation data and real radar data.","PeriodicalId":448698,"journal":{"name":"2013 IEEE International Conference on Imaging Systems and Techniques (IST)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115215369","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 : 2013-10-01DOI: 10.1109/IST.2013.6729740
Lihan He, Hai Qiu, Xu Fu, Zhilin Wu
Blade tip clearance of wind turbines is a critical operating parameter to prevent catastrophic failures caused by blade striking the tower. There are studies to estimate tip clearance in real time using a physics model. Yet, an accurate tip clearance measurement is highly desired to calibrate the physics model. In this paper, a high-speed camera based portable system for blade tip clearance measurement is proposed. The system provides a flexible method to calibrate the physics model or the models from other methods. It can also be used for any purpose where tip clearance measurement is required. Image processing algorithm is implemented to compute the tip clearance based on camera data. The proposed system is validated with field test in a 1.5 MW wind turbine.
{"title":"Camera-based portable system for wind turbine blade tip clearance measurement","authors":"Lihan He, Hai Qiu, Xu Fu, Zhilin Wu","doi":"10.1109/IST.2013.6729740","DOIUrl":"https://doi.org/10.1109/IST.2013.6729740","url":null,"abstract":"Blade tip clearance of wind turbines is a critical operating parameter to prevent catastrophic failures caused by blade striking the tower. There are studies to estimate tip clearance in real time using a physics model. Yet, an accurate tip clearance measurement is highly desired to calibrate the physics model. In this paper, a high-speed camera based portable system for blade tip clearance measurement is proposed. The system provides a flexible method to calibrate the physics model or the models from other methods. It can also be used for any purpose where tip clearance measurement is required. Image processing algorithm is implemented to compute the tip clearance based on camera data. The proposed system is validated with field test in a 1.5 MW wind turbine.","PeriodicalId":448698,"journal":{"name":"2013 IEEE International Conference on Imaging Systems and Techniques (IST)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122519003","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 : 2013-10-01DOI: 10.1007/978-3-642-38460-8_67
Yanbin Xu, Xizi Song, F. Dong, Huaxiang Wang
{"title":"An adaptive total variation regularization method for electrical resistance tomography","authors":"Yanbin Xu, Xizi Song, F. Dong, Huaxiang Wang","doi":"10.1007/978-3-642-38460-8_67","DOIUrl":"https://doi.org/10.1007/978-3-642-38460-8_67","url":null,"abstract":"","PeriodicalId":448698,"journal":{"name":"2013 IEEE International Conference on Imaging Systems and Techniques (IST)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123814802","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 : 2013-10-01DOI: 10.1109/IST.2013.6729688
Yan Fu, F. Dong, C. Tan
In electromagnetic tomography, phase of measurements from receivers contain the significant information of conductivity for target to test. The quality of reconstruction image mainly depends on the precision of phase detection. To discuss the effects in this aspect, simulate the relative conditions by the finite element simulation software, COMSOL Multi-physics. Conduct simulations for the target in object field with different conductivity and simulate the conditions when the target place at different positions in object field. To verify the validity of the results from simulations, design a prototype EMT system. This system utilizes NI PXI-5105 board to collect the high frequency signal directly, which could guarantee the precision and simplify the complexity of hardware. Based on the prototype EMT system, use the salt solution with different conductivities as target and conduct a series of relevant experiments. Results from simulations and experiments show the same variation tendency for each condition. It makes foundation for the system developing and optimization in future.
{"title":"Phase detection for conductivity based on electromagnetic measurement system","authors":"Yan Fu, F. Dong, C. Tan","doi":"10.1109/IST.2013.6729688","DOIUrl":"https://doi.org/10.1109/IST.2013.6729688","url":null,"abstract":"In electromagnetic tomography, phase of measurements from receivers contain the significant information of conductivity for target to test. The quality of reconstruction image mainly depends on the precision of phase detection. To discuss the effects in this aspect, simulate the relative conditions by the finite element simulation software, COMSOL Multi-physics. Conduct simulations for the target in object field with different conductivity and simulate the conditions when the target place at different positions in object field. To verify the validity of the results from simulations, design a prototype EMT system. This system utilizes NI PXI-5105 board to collect the high frequency signal directly, which could guarantee the precision and simplify the complexity of hardware. Based on the prototype EMT system, use the salt solution with different conductivities as target and conduct a series of relevant experiments. Results from simulations and experiments show the same variation tendency for each condition. It makes foundation for the system developing and optimization in future.","PeriodicalId":448698,"journal":{"name":"2013 IEEE International Conference on Imaging Systems and Techniques (IST)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123354065","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 : 2013-10-01DOI: 10.1109/IST.2013.6729728
S. Costanzo, G. Di Massa, M. Pastorino, A. Randazzo
Microwave imaging techniques aim at inspecting targets by using interrogating microwaves. In recent years, several numerical inversion methods and prototypes of microwave imaging systems have been developed. In most cases, they consider an illuminating apparatus and one or more probes used to measure the field scattered by the target; usually, the values of the amplitudes and phases of the field samples are needed. In this work, a hybrid approach for phaseless imaging of dielectric targets is proposed. A two-probe measurement strategy with the related phase-retrieval method is adopted in conjunction with an inversion procedure based on an inexact-Newton method to give an efficient and low-cost imaging setup. Preliminary numerical and experimental validations are discussed.
{"title":"An inverse scattering approach for inspecting dielectric scatterers at microwave frequencies without phase information","authors":"S. Costanzo, G. Di Massa, M. Pastorino, A. Randazzo","doi":"10.1109/IST.2013.6729728","DOIUrl":"https://doi.org/10.1109/IST.2013.6729728","url":null,"abstract":"Microwave imaging techniques aim at inspecting targets by using interrogating microwaves. In recent years, several numerical inversion methods and prototypes of microwave imaging systems have been developed. In most cases, they consider an illuminating apparatus and one or more probes used to measure the field scattered by the target; usually, the values of the amplitudes and phases of the field samples are needed. In this work, a hybrid approach for phaseless imaging of dielectric targets is proposed. A two-probe measurement strategy with the related phase-retrieval method is adopted in conjunction with an inversion procedure based on an inexact-Newton method to give an efficient and low-cost imaging setup. Preliminary numerical and experimental validations are discussed.","PeriodicalId":448698,"journal":{"name":"2013 IEEE International Conference on Imaging Systems and Techniques (IST)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116300208","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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