检索结果-内蒙古大学图书馆

Endothelial cell image enhancement using non-subsampled image pyramid

information technology Journal 2007年第7期6卷 1057-1062页

作者： Khan, Mohammad A. U. Khan, M. Khalid Khan, M. Aurangzeb Ibrahim, M. Talal Department of Electrical Engineering COMSATS Institute of Information Technology Abbottabad Pakistan Centre for Image Analysis Uppsala University Uppsala Sweden Department of Electrical Engineering COMSATS Institute of Information Technology Islamabad Pakistan Department of Computer Engineering Center for Advanced Studies in Engineering Islamabad Pakistan Department of Electrical Engineering COMSATS Institute of Information Technology University Road Abbottabad Pakistan

A corneal endothelial cell image provides vast amount of information about a human eye. The cell density and cell shape parameters of a given endothelial cell image help ophthalmologists in making many vital clinical decisions. The acquired endothelial image is poor in contrast where cell boundaries are masked in the background. Previously, most of the work was based on morphological operations in spatial domain. However, if we think of cell structure as texture hidden in noisy background, we can get help from wavelet-texture segmentation, a well studied area. In this study, we propose a non-subsampled Wavelet pyramid decomposition of lowpass region. At certain level of the pyramid, we start observing cleaner cell boundary structure which greatly facilitates its segmentation. Once segmented automatic cell counting can be used and simulation results have shown improvement in cell density count. © 2007 Asian Network for Scientific information.

关键词： image enhancement

来源：评论

学校读者我要写书评

暂无评论

AN IKONOS image FUSION PROCESS USING SUPPORT VALUE TRANSFORM

AN IKONOS IMAGE FUSION PROCESS USING SUPPORT VALUE TRANSFORM

引用

2007 International Conference on Machine Learning and Cybernetics(IEEE第六届机器学习与控制论国际会议)

作者： SHENG ZHENG WENZHONG SHI JIAN LIU Institute of Intelligent Vision and Image Information Best College of Electrical Engineering and In Advanced Research Center for Spatial Information Technology Department of Land Surveying and Geo-In State Education Commission Key Lab for Image Processing and Intelligent Control HUST Wuhan 430074

Panchromatic (Pan)-sharpening of multispectral (MS) bands is an important technique in various applications of satellite remote *** this paper, we apply the support value transform (SVT) to Ikonos image *** fused saliency features are represented by support values and extracted by *** low-resolution MS bands are resampled to the fine scale of the Pan image and sharpened by injecting the detailed features extracted from the high-resolution Pan *** fusing results on Ikonos MS + Pan data demonstrate that the proposed image fusion method is effective and efficient.

关键词： Mapped least squares support vector machine (mapped LS-SVM) support value transform (SVT) Ikonos image fusion

来源：评论

学校读者我要写书评

暂无评论

ROAD CENTRAL CONTOUR EXTRACTION FROM HIGH RESOLUTION SATELLITE image USING TENSOR VOTING FRAMEWORK

ROAD CENTRAL CONTOUR EXTRACTION FROM HIGH RESOLUTION SATELLI...

引用

2006 International Conference on Machine Learning and Cybernetics(IEEE第五届机器学习与控制论坛)

作者： SHENG ZHENG JIAN LIU WEN-ZHONG SHI GUANG-XI ZHU Electronic & Information Engineering Dept. Huazhong University of Science and Technology Wuhan 430 State Education Commission Key Laboratory for Image Processing and Intelligent Control Inst.for Pat Advanced Research Center for Spatial Information Technology Department of Land Surveying and Geo-In Chinese Key lab of optic & electronics Huazhong University of Science and Technology Wuhan 430074

In this paper, a unique road contour extraction approach from high resolution satellite image is proposed, in which the road contour was extracted in two steps. Firstly, support vector machines (SVM) was employed merely to classify the image into two groups of categories: a road group and a non-road group. The identified road group images are the discrete and irregularly distributed sampled points, and they are an uncompleted data set for the road. Secondly, the road contour was extracted from the road group images using the tensor voting framework, since the tensor voting technique is superior to the traditional methods in extracting the geometrical structure from the uncompleted data set. The experimental results on the high resolution satellite image demonstrate that the proposed approach worked well with images comprised by both rural and urban area features.

关键词： Tensor voting framework Road central line extraction High-resolution satellite image

来源：评论

学校读者我要写书评

暂无评论

Electrochemical properties of ionic conjugated polymer with azobenzene moieties

Electrochemical properties of ionic conjugated polymer with ...

引用

作者： Gal, Yeong-Soon Jin, Sung-Ho Lim, Kwon Taek Kim, Sung-Hoon Lyoo, Won Seok Lee, Chang-Jun Park, Jong-Wook Kim, Sang Youl Polymer Chemistry Laboratory College of Engineering Kyungil University Kyungsan Korea Republic of Department of Chemistry Education Pusan National University Busan Korea Republic of Division of Image and Information Engineering Pukyong National University Busan Korea Republic of Department of Dyeing and Finishing Kyungpook National University Daegu Korea Republic of School of Textiles Yeungnam University Kyungsan Korea Republic of Department of Chemistry Center for Nanotech. Res. Catholic University Bucheon Korea Republic of Department of Chemistry Korea Advanced Institute of Science and Technology Taejon Korea Republic of Polymer Chemistry Laboratory College of Engineering Kyungil University Kyungsan 712-701 Korea Republic of

The electrochemical and electrooptical properties of an ionic conjugated polymer, poly[2-ethynyl-N-(p-cyanophenylazophenyl)oxyhexylpyridinium bromide] (PCEPB) were studied. The cyclovoltamograms of this polymer exhibited the irreversible electrochemical behaviors between the doping and undoping peaks. The oxidation current density of PEPB versus the scan rate is approximately linear relationship in the range of 30mV/sec120mV/sec. The exponent of scan rate, x value of PEPB, is found to be 0.6. The absorption spectrum starts around 800nm and shows a strong absorption band at visible region due to the interband transition of the polymer backbone, which is a characteristic peak of the conjugated polyene backbone system. The photoluminescence spectrum showed that the PL peak is located at 542nm corresponding to the photon energy of 2.29eV.

关键词： Conjugated polymers

来源：评论

学校读者我要写书评

暂无评论

User-centric digital home photo album

User-centric digital home photo album

引用

9th International Symposium on Consumer Electronics 2005, ISCE 2005

作者： Yang, Seungji Seo, Kyong Sok Ro, Yong Man Kim, Sang-Kyun Kim, Ji-Yeon Seo, Yang Suk Information and Communications Univ. Munji 119 Yuseong Daejeon Korea Republic of Image Video Systems Lab. Korea Republic of Samsung Advanced Institute of Technology San 14-1 Giheung Yongin Korea Republic of ICU Korea Republic of SPIE Korea Republic of ISMRM Korea Republic of Computing Lab. Digital Research Center Korea Republic of MPEG-7 Visual Core Experiment Group Korea Republic of MPEG Image MAP Group Korea Republic of

In this paper, we propose a provision of usercentric home photo album system and albuming functions to support it. The main idea of the user-centric photo album is to enable users to organize and browse their photos along the semantically meaningful axes that are situation, personidentity, and category. Experiment results showed that the proposed method would be useful to album photos based on human perception. © IEEE.

关键词： Digital communication systems

来源：评论

学校读者我要写书评

暂无评论

Electro-optical properties of poly(N-alky1-2-ethynylpyridinium bromide)s

Electro-optical properties of poly(N-alky1-2-ethynylpyridini...

引用

作者： Lim, K.T. Jin, S.H. Lee, H.J. Park, J.W. Kim, S.Y. Lee, W.C. Gal, Y.S. Division of Image and Information Engineering Pukyong National University Pusan 608-739 Korea Republic of Department of Chemistry Education Pusan National University Pusan 609-735 Korea Republic of Electronics and Telecommunications Research Institute Daejon 305-350 Korea Republic of Department of Chemistry Center for Nanotech. Res. Catholic University Bucheon 420-743 Korea Republic of Department of Chemistry Korea Advanced Institute of Science and Technology Daejon 305-701 Korea Republic of Polymer Chemistry Laboratory College of General Education Kyungil University Kyungbuk 712-701 Korea Republic of

Poly(N-alkyl-2-ethynylpyridinium bromides)s with different alkyl chains were synthesized in high yields by the activated polymerisation of 2-ethynylpyridine with various alkyl bromides in the absence of any additional initiator or catalyst The polymer structures were characterized by various instrumental methods such as NMR, IR, and UV-visible spectroscopies to confirm the conjugated polymer backbone system having N-alkylpyridinium moieties. The polymers were completely soluble in such organic solvents as DMF, DMSO, and DMAc. The photoluminescence spectra of poly(N-dodecyl-2-ethynylpyridinium bromide) and poly(2-ethynyl-N-octadecylpyridinium bromide) showed that the photoluminescence peaks are located at 600 and 596 nm corresponding to the photon energy of 2.07 and 2.08 eV, respectively. © 2005 Elsevier B.V. All rights reserved.

关键词： Organic compounds

来源：评论

学校读者我要写书评

暂无评论

Assessment of emotional reaction induced by visual stimulation based on cross-correlation between pulse wave transmission time and heart rate in the Mayer wave-band

Assessment of emotional reaction induced by visual stimulati...

引用

Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： M. Yoshizawa N. Sugita A. Tanaka T. Masuda K. Abe S. Chiba T. Yambe S. Nitta Research Division on Advanced Info. Technology Information Synergy Center University of Tohoku Sendai Japan Depart. of Electri. and Commun. Eng. Graduate School of Engineering University of Tohoku Sendai Japan Image Technology Development Center Sharp Company Limited Chiba Japan Institute of Development Aging and Cancer University of Tohoku Sendai Japan

Mayer wave (0.1Hz fluctuation) included in heart rate variability and blood pressure variability appears apparently in the resting state. On the other hand, it can be predicted that a strong emotional reaction may affect the relationship between these variabilities. This prediction suggests that the human emotional reaction can be quantified by the maximum correlation coefficient /spl rho//sub max/ between heart rate and blood pressure whose frequency components are limited to the Mayer wave-band. However, the conventional method of obtaining /spl rho//sub max/ needs a bulky and expensive device for measuring continuous blood pressure. In this study, a smaller and cheaper device for measuring pulse wave transmission time (PTT) has been developed. This work has shown that the PTT can give /spl rho//sub max/ instead of blood pressure and that /spl rho//sub max/ obtained by the PTT may significantly reflect the emotional reaction on the basis of an experiment using nine healthy subjects with nine self-produced devices in which pictures were presented to the subjects to induce their emotional reactions.

关键词： Heart rate Blood pressure Pulse measurements Fluctuations Heart rate variability Blood pressure variability Humans Frequency Pressure measurement Time measurement

来源：评论

学校读者我要写书评

暂无评论

Development of neutron optical devices by a curved supermirror

KURRI Progress Report

引用

KURRI Progress Report 2003年 156-156页

作者： Ikeda, K. Adachi, T. Shimizu, H.M. Sato, H. Takizawa, Y. Morishima, T. Shinohara, T. Oku, T. Sakai, K. Kawabata, Y. Hino, M. Tasaki, S. Image Information Research Unit RIKEN Japan Advanced Science Research Center JAERI Japan Department of Physics Tokyo Institute of Technology Japan Research Reactor Institute Kyoto University Japan Graduate School of Engineering Kyoto University Japan

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

Towards automatic quantitative analysis of cardiac MR perfusion images

引用

International Congress Series 2001年第C期1230卷 967-973页

作者： Breeuwer, M. Quist, M. Spreeuwers, L. Paetsch, I. Al-Saadi, N. Nagel, E. Philips Medical Systems EasyVision Advanced Development Medical Imaging Information Technology 5680 DA Best Building QV1 P.O. Box 10.000 Netherlands University Medical Center Image Sciences Institute Heidelberglaan 100 3584 CX Utrecht Netherlands German Heart Institute Berlin Department of Cardiology 13353 Berlin Augustenburger Platz 1 Germany

Magnetic Resonance Imaging (MRI) is a powerful technique for imaging cardiovascular diseases. The introduction of cardiovascular MRI into clinical practice is however hampered by the lack of efficient and reliable automatic image analysis methods. This paper focuses on the automatic evaluation of the perfusion of blood in the myocardium (the heart muscle) from cardiac MR perfusion image series, acquired using contrast-enhanced ECG-triggered MRI. We have developed a semi-automatic quantitative analysis method with which the perfusion image series can be analysed in only a few minutes. The method is described in this paper and preliminary validation results are presented. © 2001 Elsevier Science B.V.

关键词： Automation Cardiac MR Myocardial perfusion Quantitative analysis

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：