2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)最新文献_第5页

Zero-aliasing correlation filters 零混叠相关滤波器

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703722

Joseph A. Fernandez, B. Kumar

引用次数: 14

Motion estimation by X-ray tomography: A variational formulation for 3D-volume DIC and a finite element implementation x射线断层扫描的运动估计:三维体积DIC的变分公式和有限元实现

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703812

R. Fedele, L. Galantucci, A. Ciani

{"title":"Motion estimation by X-ray tomography: A variational formulation for 3D-volume DIC and a finite element implementation","authors":"R. Fedele, L. Galantucci, A. Ciani","doi":"10.1109/ISPA.2013.6703812","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703812","url":null,"abstract":"In this study a robust strategy for 3D-Volume Digital Image Correlation (DIC) is presented, apt to provide accurate kinematic measurements within a loaded sample on the basis of three-dimensional digital images by X-ray computed micro-tomography. As an alternative to conventional Rayleigh-Ritz approach, a novel variational formulation is presented for the continuum DIC estimation. In the framework of a Galerkin finite element discretization of the displacement field, the inverse problem of estimating 3D motion inside the bulk material is solved recursively on a hierarchical family of grids, linked by suitable restriction and prolongation operators. Such structured grids are defined over an image pyramid, which is generated starting from the raw tomographic reconstructions by a reiterated application of average filters and sub-sampling operators. To achieve robust estimates of the underlying displacement fields, multi-grid cycles are performed ascending and descending along the pyramid in a selected sequence, with only one Newton iteration per level irrespectively of the tolerance satisfaction, as if the problem were linear. A Tychonoff regularization provision is implemented, which preserves the estimates against spurious oscillations. Results are presented concerning a laboratory X-ray micro-tomography experiment on a polymeric foam sample, subjected to uniaxial loading by an apparatus ad-hoc realized.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"3 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":"130770014","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

Low-complexity iris recognition method using 2D Gauss-Hermite moments 基于二维高斯-埃尔米特矩的低复杂度虹膜识别方法

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703729

S. Rahman, M. Reza, Q. M. Z. Hasani

引用次数: 4

A novel estimation methodology for tracheal pressure in mechanical ventilation control 机械通气控制中气管压力的一种新的估计方法

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703827

M. Ajčević, A. D. Lorenzo, P. Accardo, Alberto Bartoli, Eric Medvet

引用次数: 2

Comparative analysis of various thresholding techniques on TerraSAR-X images in the presence of speckle noise 存在散斑噪声的TerraSAR-X图像不同阈值处理方法的对比分析

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703711

Eyram Schwinger, A. Munthe-Kaas

引用次数: 1

Sparse coding and Gaussian modeling of coefficients average for background subtraction 稀疏编码和高斯平均系数建模的背景减法

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703744

Ciprian David, V. Gui

{"title":"Sparse coding and Gaussian modeling of coefficients average for background subtraction","authors":"Ciprian David, V. Gui","doi":"10.1109/ISPA.2013.6703744","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703744","url":null,"abstract":"A sparse coding based approach for background subtraction is proposed in this paper. The background model is composed from a K-SVD dictionary and a set of mean coefficients associated to each image location. Due to the use of sparse coding, our approach has a regional character. The recovered value of a pixel is obtained by reconstructing the surrounding image patch. In order to avoid problems introduced by difficult situations like dynamic backgrounds, an additional Gaussian model on the average of the coefficients set is used. A foreground confidence image results from this modeling. Two threshold will output the final background-foreground binary map. A first threshold on the confidence image selects possible foreground candidates. For these candidates we consider the reconstruction error, represented by the absolute difference between the reconstructed frame and the estimated background. A second threshold on these candidates offers the final discrimination. Our approach is tested against state-of-the-art methods. It is proved to perform better both in terms of visual comparison and quantitative measures.","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":"114841796","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: 8

Automatic graves' orientation detection: A tool for spatial archeology 墓穴方位自动探测:空间考古的一种工具

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703807

A. Pelagotti, F. Uccheddu, F. Nex, Fabio Remondino, Livia Chisari

{"title":"Automatic graves' orientation detection: A tool for spatial archeology","authors":"A. Pelagotti, F. Uccheddu, F. Nex, Fabio Remondino, Livia Chisari","doi":"10.1109/ISPA.2013.6703807","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703807","url":null,"abstract":"The assessment of the preferred orientation of graves in a necropolis represents an interesting contribution to the study of a civilization. In this paper two different methods are presented. The first one implies a parameterization of the map, i.e. its manual translation into a shapefile, where each grave of the necropolis is separately analyzed and a subsequent automatic orientation of the whole necropolis is achieved. This method proved to be highly reliable in the determining the tomb orientation and entrance direction, although it was quite time consuming, since a fairly important amount of manual work was required. On the other hand, the alternative proposed method using the Radon transform proved to be able to assess the main direction of the whole necropolis analyzing the scanned map image, in a fast and reliable way, without the need of any manual intervention. However in the simplest implementation and for the entire image at once, with the Radon transform it is not possible to determine the versus of the located lines. This is instead achievable when analyzing the single graves. In both cases, the main orientation was correctly detected.","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":"122567017","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

Ancient degraded document image binarization based on texture features 基于纹理特征的古代退化文档图像二值化

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703737

A. Sehad, Y. Chibani, M. Cheriet, Yacine Yaddaden

引用次数: 22

Likelihood based combining of subband estimates for wideband DOA 基于似然的宽带DOA子带估计组合

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703760

Petri Helin, B. Dumitrescu, J. Astola, I. Tabus

引用次数: 2

A fast global variational bias field correction method for MR images 一种快速的MR图像全局变分偏差场校正方法

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703822

Tetyana Ivanovska, Lei Wang, R. Laqua, K. Hegenscheid, H. Völzke, V. Liebscher

引用次数: 6