2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)最新文献_第9页

Lens distortion determination with plane calibration targets 用平面标定靶测定透镜畸变

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703740

C. Bräuer-Burchardt, P. Kühmstedt, G. Notni

引用次数: 2

Analytical rigid body reconstruction after micro-Doppler removal 微多普勒去除后分析刚体重建

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703759

V. Popovic, Filip Radenovic, L. Stanković

{"title":"Analytical rigid body reconstruction after micro-Doppler removal","authors":"V. Popovic, Filip Radenovic, L. Stanković","doi":"10.1109/ISPA.2013.6703759","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703759","url":null,"abstract":"Recently, an L-statistics based method for a successful micro-Doppler effects removal and reconstruction of the rigid body in the ISAR/SAR imaging has been proposed. During the procedure of the micro-Doppler removal, a part of the short-time Fourier transform samples that correspond to the rigid body is eliminated, as well. On the other hand, the Fourier transform of a rigid body is reconstructed based on the remaining short-time Fourier transform samples. If all the samples corresponding to the rigid body are unchanged, one highly concentrated peak as in the original Fourier transform would be obtained by this reconstruction. However, due to the removed samples of the short time Fourier transform, a number of undesired low-concentrated components spread around this peak will appear in the reconstructed Fourier transform, as well. In this paper, we propose a procedure for analytical reconstruction of the removed short-time Fourier transform samples that correspond to the rigid body. The proposed procedure leads to a highly concentrated Fourier transform (ISAR/SAR image) obtained by summing over time the resulting short-time Fourier transform filled up with the estimation of the missing rigid body related samples.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"150 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":"121641992","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: 0

Estimation of scribble placement for painting colorization 估计涂鸦的位置为绘画着色

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703804

Cristian Rusu, S. Tsaftaris

{"title":"Estimation of scribble placement for painting colorization","authors":"Cristian Rusu, S. Tsaftaris","doi":"10.1109/ISPA.2013.6703804","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703804","url":null,"abstract":"Image colorization has been a topic of interest since the mid 70's and several algorithms have been proposed that given a grayscale image and color scribbles (hints) produce a colorized image. Recently, this approach has been introduced in the field of art conservation and cultural heritage, where B&W photographs of paintings at previous stages have been colorized. However, the questions of what is the minimum number of scribbles necessary and where they should be placed in an image remain unexplored. Here we address this limitation using an iterative algorithm that provides insights as to the relationship between locally vs. globally important scribbles. Given a color image we randomly select scribbles and we attempt to color the grayscale version of the original. We define a scribble contribution measure based on the reconstruction error. We demonstrate our approach using a widely used colorization algorithm and images from a Picasso painting and the peppers test image. We show that areas isolated by thick brushstrokes or areas with high textural variation are locally important but contribute very little to the overall representation accuracy. We also find that for the case of Picasso on average 10% of scribble coverage is enough and that flat areas can be presented by few scribbles. The proposed method can be used verbatim to test any colorization algorithm.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"291 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":"114400283","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

Multi-frame super-resolution by enhanced shift & add 多帧超分辨率增强移位和添加

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703734

Kassem Al Ismaeil, Djamila Aouada, B. Ottersten, B. Mirbach

引用次数: 6

Near-automated 3D segmentation of left and right ventricles on magnetic resonance images 磁共振图像上左右心室的近自动化三维分割

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703796

G. Tarroni, D. Marsili, F. Veronesi, C. Corsi, C. Lamberti, G. Sanguinetti

{"title":"Near-automated 3D segmentation of left and right ventricles on magnetic resonance images","authors":"G. Tarroni, D. Marsili, F. Veronesi, C. Corsi, C. Lamberti, G. Sanguinetti","doi":"10.1109/ISPA.2013.6703796","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703796","url":null,"abstract":"Quantification of left (LV) and right (RV) ventricular volumes and masses from Cardiac Magnetic Resonance (CMR) images is of prime importance for the clinical assessment of a wide variety of cardiac diseases. Despite over a decade of research aimed at the development of fast and reliable tools for automated endo- and epicardial contours identification, the problem is still open, particularly for the RV as a consequence of its more irregular shape and its higher density of trabeculations. In this study, a novel near-automated technique for the segmentation of LV endo- and epicardial as well as RV endocardial contours is presented. The technique is based on a 3D narrow-band statistical level set and on 2D edge-based level set algorithms. The technique was tested on CMR images acquired at both end-diastolic and end-systolic phases. For performance evaluation, an experienced interpreter manually traced ventricular contours, which were used as reference. A series of quantitative error metrics (e.g. mean absolute distance, MAD) were computed between automatically identified and manually traced contours. The results showed the high accuracy of the proposed technique (MAD: LV Endo = 1.4±0.7 px; RV Endo = 1.6±1.2 px; LV Epi = 1.4±0.6 px), which could thus potentially lead to the implementation of a tool for fast and reliable identification of ventricular contours.","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":"129327271","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: 0

Gray-level mapping in advanced medical displays: Determining the collective and individual visual response of the users 高级医疗显示器中的灰度映射:确定用户的集体和个人视觉反应

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703791

G. Guarnieri, G. Ramponi, S. Marsi

{"title":"Gray-level mapping in advanced medical displays: Determining the collective and individual visual response of the users","authors":"G. Guarnieri, G. Ramponi, S. Marsi","doi":"10.1109/ISPA.2013.6703791","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703791","url":null,"abstract":"The DICOM Grayscale Standard Display Function (GSDF) is widely used in the medical imaging field to map the image values into luminance emitted by the display. However, the DICOM GSDF is not accurate at very dark luminance levels, and this causes a loss of visibility in the details if an image is viewed on the novel High Dynamic Rance display devices such as the ones based on the Dual Layer LCD technology. In this paper, we describe two experiments we performed in order to measure the eye sensitivity at low luminance levels and thus propose a correction. The first experiment was performed in controlled viewing conditions (dark room and fixed viewing distance) that reproduce as closely as possible those defined in the DICOM specification. The method we chose is a “staircase” procedure and uses the recently proposed “2AFC with denoising” technique, combined with a maximum-likelihood method. The results confirmed that the DICOM model overestimates the eye sensitivity at very low luminance levels. The second experiment was conducted with free viewing distance and with the lights both off and on, in order to simulate more realistic operating conditions. We used the “QUEST” algorithm to conduct the test and to compute the results, using available open-source software. The results show that the free viewing distance can improve the visibility of the details in the dark portions, because the observers tend to move closer to the display. At the same time, the ambient light has a severe impact on the observer's performance in the dark portion, but a negligible, and sometimes even slightly positive effect in the bright portions. The final target of this work is to propose a modified Display Function which offers a good performance in the entire luminance range of an HDR display and can be personalized according to the individual characteristics of each observer and to the level of ambient light.","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":"125458346","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

A method for estimating coefficients of feedback control filter under active noise control 一种主动噪声控制下反馈控制滤波器系数的估计方法

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703817

K. Fujii, M. Muneyasu, Tatsuya Sakai, Y. Iwamatsu

引用次数: 0

Improved foreground-background segmentation using Dempster-Shafer fusion 使用Dempster-Shafer融合改进前景-背景分割

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703717

Alessandro Moro, E. Mumolo, M. Nolich, Kenji Terabayashi, K. Umeda

{"title":"Improved foreground-background segmentation using Dempster-Shafer fusion","authors":"Alessandro Moro, E. Mumolo, M. Nolich, Kenji Terabayashi, K. Umeda","doi":"10.1109/ISPA.2013.6703717","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703717","url":null,"abstract":"Popular foreground-background segmentation algorithms are based of background subtraction. In complex indoor environments, if an object in motion initially remains stationary for a certain period, it can be absorbed into the background, becoming invisible to the system. Aiming at solving this problem, this paper presents a flexible and robust foreground-background segmentation algorithm based on accurate moving objects classification. Our algorithm combines low level and high level information, i.e. the data belonging to single pixels and the result of accurate object classification respectively, to improve the background management. Accurate object classification is obtained by combining classification evidence from different object recognisers using the Dempster-Shafer rule. The proposed algorithm has been tested with a large amount of acquired images; moreover, real test cases are reported. Reported experimental results include object classification accuracies obtained with a proposed Basic Belief Assignments and measurements of the quality of the background image such as Recall-Precision and F-measure computed with different background management algorithms. The experimental results show the superiority of the proposed segmentation algorithm over popular algorithms.","PeriodicalId":425029,"journal":{"name":"2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"22 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":"133995633","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

Explicit determination of bounded non-additive sets of uniqueness for four X-rays 四x射线有界非加性集唯一性的显式确定

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703808

S. Brunetti, P. Dulio, C. Peri

引用次数: 2

ECG and GSR measure and analysis using wearable systems: Application in anorexia nervosa adolescents 使用可穿戴系统测量和分析ECG和GSR:在神经性厌食症青少年中的应用

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2013-09-01 DOI: 10.1109/ISPA.2013.6703792

G. Crifaci, L. Billeci, G. Tartarisco, R. Balocchi, G. Pioggia, E. Brunori, S. Maestro, M. Morales

{"title":"ECG and GSR measure and analysis using wearable systems: Application in anorexia nervosa adolescents","authors":"G. Crifaci, L. Billeci, G. Tartarisco, R. Balocchi, G. Pioggia, E. Brunori, S. Maestro, M. Morales","doi":"10.1109/ISPA.2013.6703792","DOIUrl":"https://doi.org/10.1109/ISPA.2013.6703792","url":null,"abstract":"The objective of this study was to test the feasibility of using wearable sensors and wireless technology to measure the autonomic function and stress level in the ambulatory setting. Autonomic function was studied acquiring ECG tracings by means of a wearable sensorized chest strap. Galvanic skin response (GSR) was measured as an indicator of stress level by two electrodes positioned on the palm of the non dominant hand and a wireless acquisition module in a wrist support. Data were acquired in a group of young adolescents with anorexia nervosa (AN) as compared to controls in resting conditions. From ECG the tachogram, the mean RR intervals (meanRR), the root mean square of successive differences (RMSSD) the power of low frequency (LF) and high frequency (HF) bands and the LF/HF ratio were assessed. From GSR mean, median, variance, standard deviation, area under the curve of the sampled signal and delta between maximum and minimum conductance values were computed. All AN patients showed reduced HR and increased meanRR and RMSSD. HF increase, LF decrease and LF/HF reduction were suggestive of prevalence of parasympathetic over sympathetic activity. Additionally, AN showed a decreased GSR variance, standard deviation and delta value with respect to controls. The results of this study show that wearable sensors used in this study were feasible, unobtrusive and therefore extremely suitable for young patients providing the means for future monitoring in the home setting which may be preferable in this population burdened by high cardiovascular morbidity and mortality.","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":"130266803","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: 26