2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA)最新文献_第4页

Towards generating realistic synthetic fingerprint images 朝着生成逼真的合成指纹图像

2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2015-10-26 DOI: 10.1109/ISPA.2015.7306036

Christina Imdahl, S. Huckemann, C. Gottschlich

{"title":"Towards generating realistic synthetic fingerprint images","authors":"Christina Imdahl, S. Huckemann, C. Gottschlich","doi":"10.1109/ISPA.2015.7306036","DOIUrl":"https://doi.org/10.1109/ISPA.2015.7306036","url":null,"abstract":"Synthetic fingerprint generation has two major advantages. First, it is possible to create arbitrarily large databases for research purposes e.g. of a million or a billion fingerprints at virtually no cost and without legal constraints. Secondly, together with the generated fingerprint images comes additional ground truth information for free such as e.g. the corresponding minutiae template. However, recently it has been shown that existing methods in the literature synthesize images with unrealistic minutiae configurations, usually not visible to the naked eye of an expert. In this paper, we propose an algorithm called Realistic Fingerprint Creator (RFC) for the generation realistic synthetic fingerprint images, which, as a core ingredient, involves a selection procedure how to choose the most `realistic' synthetic fingerprints to build a database. We have performed a test of realness comparing prints synthesized by RFC and real fingerprints, and we have observed that the proposed RFC is the first method which produces artificial fingerprints that pass this test due to their realistic minutiae configuration.","PeriodicalId":299846,"journal":{"name":"2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121244032","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: 5

A voice activity detection algorithm for multichannel acoustic echo cancellation exploiting fundamental frequency estimation 一种基于基频估计的多通道回声抵消语音活动检测算法

2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2015-10-26 DOI: 10.1109/ISPA.2015.7306066

L. Romoli, S. Cecchi, F. Piazza

{"title":"A voice activity detection algorithm for multichannel acoustic echo cancellation exploiting fundamental frequency estimation","authors":"L. Romoli, S. Cecchi, F. Piazza","doi":"10.1109/ISPA.2015.7306066","DOIUrl":"https://doi.org/10.1109/ISPA.2015.7306066","url":null,"abstract":"Voice activity detection algorithms are intended to discriminate vocal segments from silence or other background noise periods. This is an important aspect in many speech communication systems and applications, e.g. teleconferencing systems. Therefore, a new method for detecting voiced segments in a multichannel scenario is proposed in this work by exploiting the fundamental frequency tracking through adaptive notch filters previously introduced for interchannel coherence reduction in multichannel acoustic echo cancellation systems. Novel expedients are presented in this paper for obtaining a more accurate tracking and thus for guaranteeing a correct voiced/unvoiced decision. The great advantage of the presented solution is related to the possibility of deriving a self-contained solution for multichannel acoustic echo cancellation where all the involved algorithms are based on the same fundamental frequency estimation. Experimental results prove the effectiveness of the proposed approach in correctly identifying vocal segments and silence and background noise periods.","PeriodicalId":299846,"journal":{"name":"2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"48 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114128494","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

αLBP - a novel member of the local binary pattern family based on α-cutting α- lbp -基于α-切割的局部二值模式族的新成员

2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2015-10-26 DOI: 10.1109/ISPA.2015.7306025

Marija Delic, Joakim Lindblad, Natasa Sladoje

引用次数: 8

Improving fingerprint alteration detection 改进指纹篡改检测

2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2015-10-26 DOI: 10.1109/ISPA.2015.7306037

C. Gottschlich, A. Mikaelyan, M. Olsen, J. Bigün, C. Busch

引用次数: 9

Topology-preserving equivalent parallel and sequential 4-subiteration 2D thinning algorithms 保持拓扑的等效并行和顺序4次迭代二维稀疏算法

2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2015-10-23 DOI: 10.1109/ISPA.2015.7306077

K. Palágyi, Gábor Németh, P. Kardos

引用次数: 7

Improved Hybrid Binarization based on Kmeans for Heterogeneous document processing 基于Kmeans的异构文档处理改进混合二值化

2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2015-09-07 DOI: 10.1109/ISPA.2015.7306060

M. Soua, R. Kachouri, M. Akil

{"title":"Improved Hybrid Binarization based on Kmeans for Heterogeneous document processing","authors":"M. Soua, R. Kachouri, M. Akil","doi":"10.1109/ISPA.2015.7306060","DOIUrl":"https://doi.org/10.1109/ISPA.2015.7306060","url":null,"abstract":"Nowadays, more and more scanned documents are converted into editable electronic representation. This proceeding relies on the Optical Character Recognition (OCR) tool-chain. Generally, an OCR system is based on the important binarization step that separates character strokes from the background document. In this context, one of more robust binarization methods is the recently proposed Hybrid Binarization based on Kmeans (HBK). It handles effectively scanned documents which includes text on simple background. Nevertheless, in Heterogeneous documents, HBK ends up with some issues when extracting foreground text from complex background images. Moreover, HBK assumes to have a dark foreground against a clear background. Otherwise, it fails to render correct binarization colors. In this paper, we propose to improve the HBK method for handling efficiently Heterogeneous documents. Indeed, our proposal employs a layout analysis process that classify document regions into text and image. Image regions are enhanced with Gamma Correction (GC) before HBK binarization. Text regions are treated directly with HBK, keeping its effectiveness on text with homogeneous background. To ensure a robust and independent color rendering in the binarized documents, we control the labeling polarity of text and background through a pixel density-based technique. According to our experiments on LRDE and ICDAR datasets, we demonstrate that I-HBK outperforms HBK when dealing with Heterogeneous documents in both F-measure and OCR accuracy.","PeriodicalId":299846,"journal":{"name":"2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129270544","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: 5

Affine Invariant Feature Description 仿射不变特征描述

2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2015-09-01 DOI: 10.1109/ISPA.2015.7306059

Christopher Bulla, Andreas Weissenburger

引用次数: 2

Digital imaging in cultural heritage neutron tomography imaging of restored original samples from Austrian cultural heritage 奥地利文化遗产修复原始样本的中子层析成像

2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2015-09-01 DOI: 10.1109/ISPA.2015.7306042

F. Hameed, M. Zawisky, A. Rohatsch

{"title":"Digital imaging in cultural heritage neutron tomography imaging of restored original samples from Austrian cultural heritage","authors":"F. Hameed, M. Zawisky, A. Rohatsch","doi":"10.1109/ISPA.2015.7306042","DOIUrl":"https://doi.org/10.1109/ISPA.2015.7306042","url":null,"abstract":"The protection and conservation of our cultural heritage which is made of natural stone is of cultural and economic value. The interaction of natural stone-made surfaces with different chemical and physical, climatic controlled, weathering processes, leads to a rapidly increasing deterioration of these monuments. Several different methods are employed in order to conserve and restore these important structures. An effective technique of conservation and restoration is the use of chemical consolidants. One of the main tasks of stone consolidants is a deep penetration into the weakened fabric and the reconstruction of the grain binding strength. The three-dimensional distribution of the consolidants in weathered rock is important for the evaluation of this conservation procedure. Neutron Imaging due to the specific sensitivity of neutrons for hydrogen could be a very useful tool for non-destructive investigation of the chemical inside the restored sample. The method of neutron tomography gives a three dimensional (3D) mapping of the conservation agent in the sample. This paper presents the application of the method of neutron tomography for assessing the consolidation of valuable original samples from historical buildings and monuments in Austria.","PeriodicalId":299846,"journal":{"name":"2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134099957","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

Translational displacement estimation with subpixel accuracy of DCT-sign phase correlation 基于dct符号相位相关的亚像素精度平移位移估计

2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2015-09-01 DOI: 10.1109/ISPA.2015.7306041

Izumi Ito

引用次数: 1

Estimation and tracking of LTE signals time of arrival in a mobile multipath environment 移动多径环境下LTE信号到达时间的估计与跟踪

2015 9th International Symposium on Image and Signal Processing and Analysis (ISPA) Pub Date : 2015-09-01 DOI: 10.1109/ISPA.2015.7306072

M. Driusso, F. Babich, Fabian Knutti, Mischa Sabathy, C. Marshall

引用次数: 36