检索结果-内蒙古大学图书馆

您好，读者！请登录

内蒙古大学图书馆

首页
概况
党建
资源
服务
科研支持
- 论文收录引用证明
- 科技查新
知识产权
档案馆
帮助

咨询与建议

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

您的常用邮箱：*

您的手机号码：*

问题描述：

当前已输入0个字，您还可以输入200个字

全部搜索
期刊论文
图书
学位论文
标准
纸本馆藏
外文资源发现
数据库导航
超星发现

高级检索

时间限定

出版年份：

文献类型

图书期刊文献学位论文多媒体

馆藏选择

电子馆藏纸本馆藏

核心期刊

全部期刊 SCI 收录期刊 SSCI 收录期刊 EI 收录期刊 CSCD 收录期刊 CSSCI 收录期刊

语言

中文英文

文献类型

期刊文献图书学位论文标准纸本馆藏

帮助

文字说明：

T=题名（书名、题名），A=作者（责任者），K=主题词，P=出版物名称，PU=出版社名称，O=机构（作者单位、学位授予单位、专利申请人），L=中图分类号，C=学科分类号，U=全部字段，Y=年（出版发行年、学位年度、标准发布年）

检索规则说明：

AND代表“并且”；OR代表“或者”；NOT代表“不包含”；(注意必须大写,运算符两边需空一格)

检索范例：

范例一：(K=图书馆学 OR K=情报学) AND A=范并思 AND Y=1982-2016
范例二：P=计算机应用与软件 AND (U=C++ OR U=Basic) NOT K=Visual AND Y=2011-2016

分类表

所选分类

>> <<

限定检索结果

文献类型

503 篇 会议
10 篇 期刊文献
3 册 图书

馆藏范围

516 篇 电子文献
0 种 纸本馆藏

日期分布

学科分类号

273 篇 工学
- 123 篇 计算机科学与技术...
- 73 篇 电气工程
- 65 篇 软件工程
- 49 篇 生物医学工程（可授...
- 37 篇 测绘科学与技术
- 36 篇 光学工程
- 24 篇 信息与通信工程
- 22 篇 仪器科学与技术
- 17 篇 生物工程
- 16 篇 控制科学与工程
- 14 篇 机械工程
- 14 篇 核科学与技术
- 12 篇 电子科学与技术（可...
- 5 篇 航空宇航科学与技...
- 4 篇 材料科学与工程（可...
- 4 篇 建筑学
- 4 篇 土木工程
222 篇 理学
- 188 篇 物理学
- 41 篇 数学
- 23 篇 生物学
- 10 篇 统计学（可授理学、...
- 9 篇 化学
- 4 篇 系统科学
- 3 篇 天文学
- 3 篇 地球物理学
185 篇 医学
- 151 篇 临床医学
- 61 篇 特种医学
- 6 篇 医学技术（可授医学...
- 4 篇 基础医学(可授医学...
13 篇 管理学
- 11 篇 管理科学与工程(可...
5 篇 农学
1 篇 法学
1 篇 军事学

主题

216 篇 image reconstruc...
36 篇 computed tomogra...
29 篇 reconstruction a...
27 篇 three-dimensiona...
26 篇 image restoratio...
23 篇 image processing
22 篇 tomography
22 篇 surface reconstr...
21 篇 shape
21 篇 solid modeling
20 篇 image quality
19 篇 cameras
18 篇 compressed sensi...
16 篇 image segmentati...
16 篇 training
15 篇 magnetic resonan...
15 篇 image resolution
13 篇 computer vision
13 篇 layout
12 篇 image coding

机构

8 篇 univ canterbury ...
6 篇 dartmouth coll t...
6 篇 univ canterbury ...
3 篇 univ rochester i...
3 篇 univ n carolina ...
3 篇 university of po...
2 篇 linkoping univ d...
2 篇 peking univ peop...
2 篇 department of ra...
2 篇 laboratoire des ...
2 篇 dipartimento di ...
2 篇 univ chinese aca...
2 篇 school of comput...
2 篇 department of en...
2 篇 washington univ ...
2 篇 the technical un...
2 篇 tsinghua univ de...
2 篇 dartmouth coll h...
2 篇 sispia sarl 18 a...
2 篇 tomowave labs ho...

作者

8 篇 millane rp
8 篇 anastasio mark a...
6 篇 doerschuk peter ...
5 篇 lambert a
5 篇 fraser d
5 篇 zheng yili
4 篇 millane r. p.
4 篇 fiddy michael a.
4 篇 bones philip j.
4 篇 millane rick p.
4 篇 tahtali murat
4 篇 testorf markus e...
3 篇 kudo hiroyuki
3 篇 jiajun wang
3 篇 bouman ca
3 篇 chen gh
3 篇 bones pj
3 篇 lambert andrew
3 篇 danfeng hu
3 篇 jahromi mrs

语言

514 篇 英文
1 篇 其他
1 篇 中文

检索条件"任意字段=Conference on Image Reconstruction from Incomplete Data IV"

共 516 条记录，以下是421-430 订阅

全选清除本页清除全部题录导出标记到"检索档案"

详细简洁

排序：

Color image compression: Multiwavelets vs. scalar wavelets

Color image compression: Multiwavelets vs. scalar wavelets

引用

IEEE International conference on Acoustics, Speech, and Signal Processing

作者： Rout, S Bell, AE Virginia Tech Dept Elect & Comp Engn Blacksburg VA 24061 USA

ISBN: (纸本)0780374029

Recently developed balanced multiwavelets have proven effective for image compression;however, their performance falls slightly short of the scalar wavelets. A previous comparison of some scalar wavelet and multiwavelet, properties illustrated their importance for grayscale image compression. In this paper we present another property: the perfect reconstruction (PR) property;it too appears to explain the performance differences. This paper compares the compression performance of 3 scalar wavelets and 5 balanced multiwavelets on 7 color images. We observe that SA(4) depicts the best performance amongst the multiwavelets in terms of both subjective quality and PSNR;this matches our expectation based on our results that indicate that it is the only BMW which satisfies the PR conditions. Although SA(4) rivals the biorthogonal scalar wavelets in terms of many desirable properties, it suffers from a lower balancing/vanishing order. This difference explains the 0.01-0.47 dB performance gap between the best scalar wavelet and the best balanced multiwavelet.

关键词： image colour analysis image reconstruction wavelet transforms transform coding image coding data compression color image compression balanced multiwavelets scalar wavelets grayscale image compression perfect reconstruction property compression performance subjective quality PSNR biorthogonal scalar wavelets balancing/vanishing order

来源：评论

学校读者我要写书评

暂无评论

Estimation of auditory spatial cues for binaural cue coding

Estimation of auditory spatial cues for binaural cue coding

引用

IEEE International conference on Acoustics, Speech, and Signal Processing

作者： Baumgarte, F Faller, C Agere Syst Media Signal Proc Res Murray Hill NJ USA

ISBN: (纸本)0780374029

Binaural Cue Coding (BCC) offers a compact parametric representation of auditory spatial information. This representation can be applied to stereophonic or multi-channel audio compression. It allows to reconstruct the spatial image given a mono audio signal and spatial cues that require only a low data volume. This paper focuses on the extraction of the spatial cues from a stereophonic signal with a BCC analyzer. Results of a first subjective quality evaluation confirm that this technique is able to approximate the spatial image of critical reference signals. Thus BCC has the potential to offer highly efficient stereophonic or multi-channel coding, even at very low bit rates that currently permit coding of only one mono channel.

关键词： audio coding signal reconstruction signal representation data compression channel coding auditory spatial cues estimation binaural cue coding parametric representation auditory spatial information stereophonic audio compression multichannel audio compression spatial image reconstruction mono audio signal low data volume spatial cues extraction stereophonic signal subjective quality evaluation reference signals multichannel coding stereophonic coding audio coding

来源：评论

学校读者我要写书评

暂无评论

Multi-frame blind deconvolution with linear equality constraints

Multi-frame blind deconvolution with linear equality constra...

引用

2nd conference on image reconstruction from incomplete data

作者： Löfdahl, MG Royal Swedish Acad Sci AlbaNova Univ Ctr Inst Solar Phys SE-10691 Stockholm Sweden

ISBN: (纸本)0819445592

\The Phase Diverse Speckle (PDS) problem is formulated mathematically as Multi Frame Blind Deconvolution (MFBD) together with a set of Linear Equality Constraints (LECs) on the wavefront expansion parameters. This MFBD-LEC formulation is quite general and, in addition to PDS, it allows the same code to handle a variety of different data collection schemes specified as data, the LECs, rather than in the code. It also relieves us from having to derive new expressions for the gradient of the wavefront parameter vector for each type of data set. The idea is first presented with a simple formulation that accommodates Phase Diversity, Phase Diverse Speckle, and Shack-Hartmann wavefront sensing. Then various generalizations are discussed, that allows many other types of data sets to be handled. Background: Unless auxiliary information is used, the Blind Deconvolution problem for a single frame is not well posed because the object and PSF information in a data frame cannot be separated. There are different ways of bringing auxiliary information to bear on the problem. MFBD uses several frames which helps somewhat, because the solutions are constrained by a requirement that the object be the same, but is often not enough to get useful results without further constraints. One class of MFBD methods constrain the solutions by requiring that the PSFs correspond to wavefronts over a certain pupil geometry, expanded in a finite basis. This is an effective approach but there is still a problem of uniqueness in that different phases can give the same PSF. Phase Diversity and the more general PDS methods are special cases of this class of MFBD, where the observations are usually arranged so that in-focus data is collected together with intentionally defocused data, where information on the object is sacrificed for more information on the aberrations. The known differences and similarities between the phases are used to get better estimates.

关键词： wavefront sensing deconvolution phase diversity inverse problems image restoration Shack-Hartmann

来源：评论

学校读者我要写书评

暂无评论

3D structure from video streams with partially overlapping images

3D structure from video streams with partially overlapping i...

引用

IEEE International conference on image Processing

作者： R.F.C. Guerreiro P.M.Q. Aguiar Institute for Systems and Robotic Lisboa Portugal

The majority of methods available to recover 3D structure from video assume that a set of feature points are tracked across a large number of frames. This is not always possible in real videos because the images overlap only partially, due to occlusion and limited field of view. The paper describes a new method to recover 3D structures from videos with partially overlapping views. The well known factorization method recovers 3D rigid structures by factoring an observation matrix that collects the trajectories of feature points (see Tomasi, C. and Kanade, T., Int. J. of Computer Vision, vol.9, no.2, 1992). We extend this method to the more challenging scenario of observing incomplete trajectories. In this way, we accommodate not only features that disappear, but also features that, although not visible in the first image, become available later. Under this scenario, the observation matrix has missing entries. We develop three new algorithms to factor out matrices with missing data. Experiments with synthetic data and real video images demonstrate the viability of our approach to recover 3D structure.

关键词： Streaming media Layout Shape Matrix decomposition Iterative algorithms Robots Cameras Virtual reality Brightness image reconstruction

来源：评论

学校读者我要写书评

暂无评论

Limited view thermoacoustic tomography

Limited view thermoacoustic tomography

引用

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

作者： Yuan Xu L.V. Wang Biomedical Engineering Program Texas A and M University College Station TX USA

Truncated conjugate gradient method was applied to study the limited view problem in thermoacoustic tomography, and the results were compared with those of modified backprojection method, which is the backprojection of the first order time derivative of acoustic signals. Our numerical simulations showed that there is complete data for a stable and perfect reconstruction in a 2-D /spl pi/-view problem, where the least angle acquired by the detection curve is /spl pi/ when viewed from the imaged region of interest. On the contrary, in a problem where the view is less than /spl pi/, data is incomplete, and artifacts and quantitative errors were obvious in the reconstructed images. It was pointed out that the result after one iteration in truncated conjugate gradient method is equivalent to that of modified backprojection, which can restore the high frequency information of imaged objects. The low frequency information can be recovered significantly in the next ten iterations of truncated conjugate gradient method.

关键词： Tomography Object detection Solids Gradient methods image reconstruction Electromagnetic heating Frequency Microwave theory and techniques Electromagnetic wave absorption Thermal expansion

来源：评论

学校读者我要写书评

暂无评论

Optimal camera placement for cardiac imaging using rotating multi-segment slant-hole single photon emission computed tomography

Optimal camera placement for cardiac imaging using rotating ...

引用

IEEE Symposium on Nuclear Science (NSS/MIC)

作者： Yuchuan Wang B.M.W. Tsui W.H. Baird Division of Medical Imaging Physics Department ofRadiology Johns Hopkins Medical Institutions Baltimore MD USA Department of Biomedical Engineering North Carolina State University Chapel Hill NC USA Division of Medical Imaging Physics Department of Radiology Johns Hopkins Medical Institutions Baltimore MD USA Department of physics College of Charleston Charleston SC USA Department of Biomedical Engineering University of North Carolina Chapel Hill Charleston SC USA

Rotating multi-segment slant-hole (RMSSH) collimators provide much higher detection efficiency and allow fully 3D cardiac SPECT using a much lower number of camera positions as compared to conventional low-energy high-resolution parallel-hole collimators. In this study, the effects of number and placement of camera positions in RMSSH SPECT for cardiac imaging were studied, to achieve the best possible reconstruction image quality with minimal image artifacts. Both simulation and phantom experiments were performed. A modified SIMIND Monte-Carlo code and the realistic 3D NURBS-based Cardiac-Torso (NCAT) phantom were used in simulation studies. A GE 400AC/T camera equipped with a 4-segment slant-hole collimator with a 32.5/spl deg/ slant-angle and a data Spectrum anthropomorphic torso phantom with cardiac insert were used in phantom experiments. Ectomography (single camera position) and RMSSH (two to three camera positions) projection data of the heart were simulated and acquired from different camera positions, and then reconstructed using an iterative OS-EM algorithm for comparison. For incomplete angle RMSSH SPECT of the heart, Ectomography gives noticeable image artifacts and distortions at any camera position. RMSSH SPECT images obtained using two camera positions 90/spl deg/ apart show significant improvements as compared with only one camera position used in Ectomography, and those placed symmetrically with respect to the long axis of the heart give the best image quality. For complete angle RMSSH SPECT acquisition of the heart using three camera positions, all combinations of camera positions that satisfy Orlov's condition show similar images that are of higher quality and quantitative accuracy than that from incomplete angle acquisitions. We conclude that the number and placement of camera positions in cardiac RMSSH SPECT should be chosen carefully for best reconstructed image and quantitative accuracy.

关键词： Cameras Single photon emission computed tomography Imaging phantoms Heart Collimators image reconstruction High-resolution imaging image quality Anthropomorphism Torso

来源：评论

学校读者我要写书评

暂无评论

Three-dimensional optical image reconstruction from phantom and clinical data

Three-dimensional optical image reconstruction from phantom ...

引用

conference on Optical Tomography and Spectroscopy of Tissue iv

作者： Xu, Y Iftimia, N Jiang, HB Clemson Univ Dept Phys & Astro Biomed Opt Lab Clemson SC 29634 USA

ISBN: (纸本)0819439282

A three-dimensional (3D) finite-element optical tomographic reconstruction algorithm based on a diffusion equation approximation is presented. The algorithm uses a regularized Newton method to update an initial (guess) optical property distribution iteratively in order to minimize an object function composed of a weighted sum of the squared difference between computed and measured data, and reconstructs the spatial distribution of the absorption and scattering coefficients of turbid media/tissues using DC data. Considering the memory requirements and computational cost for 3D reconstruction, the algorithm has been parallelized with Message-Passing Interface. We have conducted both phantom and in vivo clinical experiments to evaluate our parallelized three-dimensional reconstruction algorithm. The results show that 3D volumetric images of turbid media and in vivo tissues can be successfully reconstructed.

关键词： photon migration image reconstruction techniques three-dimensional image processing

来源：评论

学校读者我要写书评

暂无评论

Optical tomography of a 3D multilayered head model

Optical tomography of a 3D multilayered head model

引用

conference on Optical Tomography and Spectroscopy of Tissue iv

作者： Dehghani, H Hillman, EMC Schweiger, M Arridge, SR Delpy, DT Univ Coll London Dept Med Phys & Bioengn London WC1E 6JA England

ISBN: (纸本)0819439282

The head is inherently a heterogenous 3 dimensional (3D) domain and any useful image reconstruction algorithm in optical tomography should be based oil the true shape and dimensions of the domain to be imaged. However due to the computational complexity of the problem, most reconstruction algorithms have been based on either 2 dimensional (2D) domains or simple 3D homogenous models. In this work we use a complex multi-layered model of the head to generate data in tile presence of known changes of absorption within the brain. In order to evaluate the reconstruction of images from 3D data, we use either a 2D mesh based on the outline of a single measurement plane, or a 3D mesh based on the forward model itself. We show that the use of a 2D model for the reconstruction of images from a complex heterogenous 3D model is not successful for absolute imaging of internal optical property. In 3D, image reconstruction using meantime data only from a 3D domain is not successful when reconstructing for absorption only while keeping background scatter constant and homogenous. image reconstruction in 3D is greatly, improved when a-priori structural knowledge is used. reconstruction of internal absorption only, from difference data (data after a change in absorption minus data before a change) works both in 2D and 3D., however in 2D, any depth information available from the data is lost.

关键词： 3D modeling data modeling 3D image processing Head 3D image reconstruction Absorption image restoration 3D metrology Brain Optical tomography

来源：评论

学校读者我要写书评

暂无评论

Differential imaging in heterogeneous media: limitations of linearization assumptions in optical tomography.

Differential imaging in heterogeneous media: limitations of ...

引用

conference on Optical Tomography and Spectroscopy of Tissue iv

作者： Hillman, EMC Dehghani, H Hebden, JC Arridge, SR Schweiger, M Delpy, DT UCL Dept Med Phys & Bioengn London WC1E 6JA England

ISBN: (纸本)0819439282

image reconstruction and data collection in optical tomography can be achieved in a number of different ways. This paper explores the limitations of using assumptions of linearity, particularly in the case where image data is acquired before and after a change in optical properties within an object with heterogeneous optical properties. The effects of using a 2 dimensional (2D) reconstruction scheme for changes in 3D measurements are also demonstrated. Problems are a direct result of the inherent non-linearity of optical tomographic image reconstruction. We show how these assumptions affect images of changes in absorption in the presence of a) heterogeneous background scatter, and b) heterogeneous background absorption using both simulations and time-resolved experimental data. Comparisons of results using non-linear and linear image reconstruction techniques are included throughout. The origin and dependence of the error are investigated. Methods to improve results by using estimates of background structure from baseline images are shown to improve quantitation and object localization in simple images. The potential significance of this error is discussed in relation to successful, reliable clinical imaging of the neonatal brain.

关键词： optical tomography differential imaging non-linear image reconstruction linear image reconstruction

来源：评论

学校读者我要写书评

暂无评论

Mining massively incomplete data sets by conceptual reconstruction 01

Mining massively incomplete data sets by conceptual reconstr...

引用

Proceedings of the Seventh ACM SIGKDD International conference on Knowledge Discovery and data Mining (KDD-2001)

作者： Aggarwal, Charu C. Parthasarathy, Srinivasan IBM T. J. Watson Research Center Yorktown Heights NY 10598 United States Ohio State university Columbus OH United States

ISBN: (纸本)158113391X

incomplete data sets have become almost ubiquitous in a wide variety of application domains. Common examples can be found in climate and image data sets, sensor data sets and medical data sets. The incompleteness in these data sets may arise from a number of factors: in some cases it may simply be a reflection of certain measurements not being available at the time;in others the information may be lost due to partial system failure;or it may simply be a result of users being unwilling to specify attributes due to privacy concerns. When a significant fraction of the entries are missing in all of the attributes, it becomes very difficult to perform any kind of reasonable extrapolation on the original data. For such cases, we introduce the novel idea of conceptual reconstruction, in which we create effective conceptual representations on which the data mining algorithms can be directly applied. The attraction behind the idea of conceptual reconstruction is to use the correlation structure of the data in order to express it in terms of concepts rather the original dimensions. As a result, the reconstruction procedure estimates only those conceptual aspects of the data which can be mined from the incomplete data set, rather than force errors created by extrapolation. We demonstrate the effectiveness of the approach on a variety of real data sets.

关键词： data mining

来源：评论

学校读者我要写书评

暂无评论

没有更多数据了...

全选清除本页清除全部题录导出标记到“检索档案”

共52页 << < 39 40 41 42 43 44 45 46 47 48 > >>

检索报告对象比较合并检索0

隐藏清空

合并搜索

回到顶部

执行限定条件

内容：

评分：

请选择保存的检索档案：

请选择收藏分类：

订阅名称：

通借通还

温馨提示：

图书名称：

借书校区：

取书校区：

手机号码：

邮箱地址：

一卡通帐号：

电话和邮箱必须正确填写，我们会与您联系确认。

联系人：

所在院系：

联系邮箱：

联系电话：

内蒙古自治区呼和浩特市赛罕区大学西街235号邮编: 010021

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：