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2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)最新文献

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On 2.5D surface reconstruction of cell cultures 细胞培养物的2.5D表面重建
2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703742
W. Smith, K. Lam, D. Collins, J. Richardson
{"title":"On 2.5D surface reconstruction of cell cultures","authors":"W. Smith, K. Lam, D. Collins, J. Richardson","doi":"10.1109/ISPA.2013.6703742","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703742","url":null,"abstract":"The domain of image processing for cell microscopy presents non-trivial challenges that must be addressed for consistent image quality. One such challenge concerns the loss of focus as a result of cellular processes, where cell objects may move or change their morphology and, as a result, lie outside of the depth-of-view of the lens. This paper presents two approaches to addressing this problem; namely, the multiscale and geometric methods of image depth estimation. These algorithms are applied to a z-stack of images acquired from a standard phase contrast microscope and a total internal reflection microscope. To assess the algorithms in terms of their scalability, 10×, 20×, and 60× lens objectives are used to offer increased spatial resolutions as well as corresponding improvements in image quality.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131376029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Uncalibrated dynamic stereo using parallax 使用视差的未校准动态立体
2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703743
Francesco Malapelle, Andrea Fusiello, B. Rossi, E. Piccinelli, P. Fragneto
{"title":"Uncalibrated dynamic stereo using parallax","authors":"Francesco Malapelle, Andrea Fusiello, B. Rossi, E. Piccinelli, P. Fragneto","doi":"10.1109/ISPA.2013.6703743","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703743","url":null,"abstract":"In this paper a novel method for computing parallax maps from monocular and uncalibrated video sequences is described. Acquired frames are processed pairwise, starting from a first reference and progressively integrating information coming from subsequent frames in temporal order using a Kalman filter. In this way, temporal stabilization of the generated maps is obtained as well as more consistency with the real video content. Results and evidences coming from the benchmark of the system on both synthetic and natural images have also been reported, showing significant improvements with respect to the parallax maps obtained without temporal integration.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126512685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Convex combination of MIMO filters for multichannel acoustic echo cancellation 凸组合MIMO滤波器用于多通道回声消除
2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703842
D. Comminiello, Simone Scardapane, M. Scarpiniti, R. Parisi, A. Uncini
{"title":"Convex combination of MIMO filters for multichannel acoustic echo cancellation","authors":"D. Comminiello, Simone Scardapane, M. Scarpiniti, R. Parisi, A. Uncini","doi":"10.1109/ISPA.2013.6703842","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703842","url":null,"abstract":"This paper introduces a new framework for multichannel adaptive filtering, aiming at improving performance of an overall filtering system. The proposed architecture relies on the properties of the adaptive combination of filters which exploits the capabilities of different constituents, thus adaptively providing at least the behaviour of the best performing filter. Applying this concept to multichannel filtering systems, we define a scheme for the combination of multiple-input multiple-output (MIMO) filters. More precisely the proposed structure involves the combination of two different multiple-input singleoutput (MISO) systems for each MIMO output. We propose such framework with application to the multichannel acoustic echo cancellation (MAEC) with the goal of giving robustness to the system against impulsive background noise, and thus improving overall cancelling performance. Experimental results show the effectiveness of the proposed combined MAEC in the presence of adverse environmental conditions.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126731771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Assessment of kidney volumes in polycystic kidney disease from coronal and axial MR images 从冠状和轴向磁共振图像评估多囊肾病的肾脏体积
2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703797
D. Turco, C. Corsi, S. Severi, R. Mignani
{"title":"Assessment of kidney volumes in polycystic kidney disease from coronal and axial MR images","authors":"D. Turco, C. Corsi, S. Severi, R. Mignani","doi":"10.1109/ISPA.2013.6703797","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703797","url":null,"abstract":"Total renal volume (TRV) and individual renal cysts are important quantitative indicators of the progression of autosomal dominant polycystic kidney disease (ADPKD). TRV has been assessed by manually tracing renal contours from CT or MR scans, often employing contrast media (CM). We developed a fast and nearly automated technique based on the analysis of MR axial images acquired without CM injection for TRV quantification. Twenty ADPKD patients underwent MRI. Automatic extraction of kidney contours was performed on each acquired slice; the segmentation procedure was based on region growing and on the application of morphological operators and curvature-based motion. The area inside each contour was calculated and TRV was derived. Volume measurements were compared between axial and coronal acquisitions. TRV estimated in patients from axial acquisition was 1931±1117ml (range: 428÷4622ml) and from coronal acquisition volumes resulted in 1943±1135ml (range: 393÷4604ml) (p>0.05). These automatic measurements were in excellent correlation (r=0.99, y=1.01×-13.9) with a small bias and narrow limits of agreement in both absolute (-12±93ml) and percentage (-0.2±4.6%) terms. This preliminary study showed TRV from axial and coronal MRI acquisitions can be assessed automatically and with comparable and accurate results without requiring the use of potentially nephrotoxic contrast medium.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117332521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Pattern recognition in medical imaging by means of the Hough transform of curves 基于曲线霍夫变换的医学图像模式识别
2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703753
C. Campi, Annalisa Perasso, M. Beltrametti, A. Massone, G. Sambuceti, M. Piana
{"title":"Pattern recognition in medical imaging by means of the Hough transform of curves","authors":"C. Campi, Annalisa Perasso, M. Beltrametti, A. Massone, G. Sambuceti, M. Piana","doi":"10.1109/ISPA.2013.6703753","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703753","url":null,"abstract":"The Hough transform is a classical pattern recognition algorithm used to detect straight lines, circles and ellipses in images. Recently, algebraic geometry arguments have been applied to generalize this approach to special classes of curves. Here we provide preliminary results showing that this method can be utilized for the recognition of compact bone profiles in clinical X-ray tomography images and therefore potentially represents an effective computational tool for applications in hematology and oncology.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123098870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Nonlinear system identification by means of mixtures of linear-in-the-parameters nonlinear filters 非线性系统的参数线性混合滤波器辨识
2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703763
G. Sicuranza, A. Carini
{"title":"Nonlinear system identification by means of mixtures of linear-in-the-parameters nonlinear filters","authors":"G. Sicuranza, A. Carini","doi":"10.1109/ISPA.2013.6703763","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703763","url":null,"abstract":"In this paper, we deal with the unconstrained linear combination of the outputs of linear-in-the-parameters (LIP) nonlinear filters. We first analyze its steady-state performance using the Wiener theory of the optimal filter. Then, the implementation of the mixture of a linear and an even mirror Fourier nonlinear filter is considered. A simple adaptation algorithm for the filters in the mixture scheme that does not require the preliminary choice of the step sizes, as in the case of usual adaptation algorithms, is proposed. The presented approach is useful for the identification of time-varying nonlinear systems, exploiting the orthogonality of the basis functions of the constituent filters in presence of a white uniform input signal in [-1, +1]. Simulations results are reported showing the good performance obtained in these cases.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115697452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Evaluation of point matching methods for wide-baseline stereo correspondence on mobile platforms 移动平台上宽基线立体对应点匹配方法评价
2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703848
Endre Juhasz, A. Tanács, Z. Kato
{"title":"Evaluation of point matching methods for wide-baseline stereo correspondence on mobile platforms","authors":"Endre Juhasz, A. Tanács, Z. Kato","doi":"10.1109/ISPA.2013.6703848","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703848","url":null,"abstract":"Wide-baseline stereo matching is a common problem of computer vision. By the explosion of smartphones equipped with camera modules, many classical computer vision solutions have been adapted to such platforms. Considering the widespread use of various networking options for mobile phones, one can consider a set of smart phones as an ad-hoc camera network, where each camera is equipped with a more and more powerful computing engine in addition to a limited bandwidth communication with other devices. Therefore the performance of classical vision algorithms in a collaborative mobile environment is of particular interest. In such a scenario we expect that the images are taken almost simultaneously but from different viewpoints, implying that the camera poses are significantly different but lighting conditions are the same. In this work, we provide quantitative comparison of the most important keypoint detectors and descriptors in the context of wide baseline stereo matching. We found that for resolution of 2 megapixels images the current mobile hardware is capable of providing results efficiently.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125072553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Dynamic X-ray tomography with multiple sources 多源动态x射线断层扫描
2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703813
Esa Niemi, M. Lassas, S. Siltanen
{"title":"Dynamic X-ray tomography with multiple sources","authors":"Esa Niemi, M. Lassas, S. Siltanen","doi":"10.1109/ISPA.2013.6703813","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703813","url":null,"abstract":"A novel time-dependent tomographic imaging modality with multiple source-detector pairs in fixed positions is discussed. All detectors record simultaneously time-dependent radiographic data (“X-ray videos”) of a moving object, such as a beating heart. The dynamic two- or three-dimensional structure is reconstructed from projection data using a new computational method. Time is considered as an additional dimension in the problem, and a generalized level set method [Kolehmainen, Lassas, Siltanen, SIAM J Scientific Computation 30 (2008)] is applied in the space-time. In this approach, the X-ray attenuation coefficient is modeled by the continuous level set function itself (instead of a constant) inside the domain defined by the level set, and by zero outside. A numerical example with simulated data suggests that the method enforces suitable continuity both spatially and temporally. A drawback of the method is that it is not applicable to real-time imaging.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116459382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Bounds on the size of Lee-codes 李氏码大小的界限
2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703787
Helena Astola, I. Tabus
{"title":"Bounds on the size of Lee-codes","authors":"Helena Astola, I. Tabus","doi":"10.1109/ISPA.2013.6703787","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703787","url":null,"abstract":"Finding the largest code with a given minimum distance is one of the most basic problems in coding theory. In this paper, we compute new upper bounds on size of codes in the Lee metric using the linear programming method. We present a recursive formula for obtaining the Lee-numbers, which makes it possible to efficiently compute these bounds. The obtained bounds are useful in determining whether good codes suitable for signal processing applications exist with given parameters.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125855123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Multiple-channel frequency-adaptive active vibration control using SONIC 基于SONIC的多通道频率自适应主动振动控制
2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703815
M. Meller, M. Niedźwiecki
{"title":"Multiple-channel frequency-adaptive active vibration control using SONIC","authors":"M. Meller, M. Niedźwiecki","doi":"10.1109/ISPA.2013.6703815","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703815","url":null,"abstract":"SONIC (self-optimizing narrowband interference canceller) is an acronym of a new approach to rejection of sinusoidal disturbances acting at the output of a discrete-time stable linear plant with unknown and possibly time-varying dynamics. The paper presents two frequency-adaptive extensions of the multivariate SONIC algorithm. The efficacy of the proposed solutions is tested using our laboratory-scale active vibration control plant.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127486456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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