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

369 篇 会议
3 篇 期刊文献
2 册 图书

馆藏范围

373 篇 电子文献
1 种 纸本馆藏

日期分布

学科分类号

245 篇 理学
- 224 篇 物理学
- 31 篇 数学
- 11 篇 统计学（可授理学、...
- 1 篇 化学
- 1 篇 天文学
- 1 篇 海洋科学
- 1 篇 地球物理学
- 1 篇 生物学
238 篇 工学
- 137 篇 软件工程
- 106 篇 信息与通信工程
- 98 篇 计算机科学与技术...
- 83 篇 电气工程
- 16 篇 仪器科学与技术
- 15 篇 机械工程
- 13 篇 光学工程
- 8 篇 控制科学与工程
- 6 篇 测绘科学与技术
- 4 篇 电子科学与技术（可...
- 4 篇 生物医学工程（可授...
- 1 篇 力学（可授工学、理...
- 1 篇 材料科学与工程（可...
- 1 篇 动力工程及工程热...
- 1 篇 石油与天然气工程
- 1 篇 轻工技术与工程
- 1 篇 船舶与海洋工程
- 1 篇 环境科学与工程（可...
90 篇 医学
- 88 篇 临床医学
- 4 篇 特种医学
13 篇 管理学
- 8 篇 管理科学与工程(可...
- 5 篇 图书情报与档案管...
1 篇 艺术学

主题

97 篇 video compressio...
77 篇 image compressio...
67 篇 video
48 篇 video coding
39 篇 motion estimatio...
33 篇 quantization
32 篇 computer program...
29 篇 video signal pro...
24 篇 visualization
21 篇 image processing
20 篇 image quality
19 篇 image coding
15 篇 image segmentati...
15 篇 standards develo...
15 篇 transform coding
15 篇 motion models
14 篇 cameras
14 篇 data compression
14 篇 video processing
14 篇 compression

机构

3 篇 univ essex dept ...
3 篇 fastvdo llc 3097...
3 篇 univ florida dep...
2 篇 ecole polytech f...
2 篇 warsaw univ tech...
2 篇 univ so calif de...
2 篇 ecole polytech f...
2 篇 columbia univ de...
2 篇 univ loughboroug...
2 篇 commun res ctr o...
2 篇 philips broadcas...
2 篇 univ loughboroug...
2 篇 hewlett packard ...
2 篇 univ cagliari de...
2 篇 univ. of michiga...
2 篇 univ ottawa dept...
2 篇 univ texas dept ...
2 篇 univ stuttgart i...
2 篇 kaleida labs inc...
2 篇 monash univ dept...

作者

10 篇 ebrahimi touradj
5 篇 panchanathan s
4 篇 schmalz ms
4 篇 hadar ofer
3 篇 ritter gx
3 篇 wiegand thomas
3 篇 ghanbari m
3 篇 bhaskaran v
3 篇 hanhart philippe
3 篇 rerabek martin
3 篇 kasperovich l
2 篇 pian j.
2 篇 jain a
2 篇 lemahieu i
2 篇 dolzhenko vladim...
2 篇 delameillieure j
2 篇 wu hr
2 篇 kokaram anil
2 篇 beakley gw
2 篇 chesnokov vyache...

语言

371 篇 英文
2 篇 其他
1 篇 俄文

检索条件"任意字段=Digital Video Compression - Algorithms and Technologies 1996 Conference"

共 374 条记录，以下是41-50 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：

video CODING WITH WAVELET TRANSFORM ON THE VERY-LOW BIT-RATE COMMUNICATION CHANNEL

VIDEO CODING WITH WAVELET TRANSFORM ON THE VERY-LOW BIT-RATE...

引用

conference on digital video compression on Personal Computers: algorithms and technologies

作者： KIM, SW LEE, HK KOREA ADV INST SCI & TECHNOL DEPT COMP SCITAEJON 305701SOUTH KOREA

ISBN: (纸本)0819414824

In this paper, we present a moving image coding system which uses wavelet transform for the videophone on a very low bit rate communication channel (10 K bps PSTN). There are two requirements for our coding system: the good subjective quality for low bit rate coding and the suitability for progressive transmission. To satisfy the requirements, we use multifrequency motion estimation which estimates motion for each frequency bands. After the motion estimation, we can assign less bits to the motion estimation error in the high frequency bands because the human is insensitive to the change in high frequency components in the case of moving image. The experimental results confirm that our approach out-performs discrete cosine transform coding schemes in terms of the subjective quality because there are no blocking effects, and moreover, the wavelet transform in the approach supports the progressive transmission in itself.

关键词： Motion estimation Wavelet transforms Wavelets Image compression video coding video Image processing Image quality video compression Telecommunications

来源：评论

学校读者我要写书评

暂无评论

COMPUTER-BASED TESTING OF digital video QUALITY

COMPUTER-BASED TESTING OF DIGITAL VIDEO QUALITY

引用

conference on digital video compression on Personal Computers: algorithms and technologies

作者： CRESSY, CP BEAKLEY, GW STELLACOM INC ADV TELEVISION SYSTARLINGTONVA 22209

ISBN: (纸本)0819414824

Conventional analog video test measurements are generally not adequate for digital video, especially compressed video. This is because digital video distortion and artifacts often are spatially and temporally discrete phenomena. Most analog measurements assume that errors are of a continuous, linear nature. The only alternative to data has been subjective testing. Formal subjective tests (e.g., CCIR 500) can provide reliable, relative measures of video quality. However, such testing is time-consuming and expensive. Objective testing methods are needed to provide efficient, repeatable measures of video quality. A further advantage of objective testing is that it can provide greater insights into the nature of impairments. Presently, no standardized objective measures exist for digital video. However, pioneering work has been done by NTIA, NASA, ACATS and others to quantify the quality of digital video codecs. We have implemented some of the published measurements and others of our own design on a low-cost workstation. These measures utilize complex digital image processing techniques to analyze differences between source and processed video sequences. This paper presents formulations of these measurements and describes our implementation of an automated system to capture and test digital video quality.

关键词： video Distortion video compression Analog electronics Image registration Error analysis video processing Signal to noise ratio Image processing Computer programming

来源：评论

学校读者我要写书评

暂无评论

SEGMENTATION OF FRAMES IN A video SEQUENCE USING MOTION AND OTHER ATTRIBUTES

SEGMENTATION OF FRAMES IN A VIDEO SEQUENCE USING MOTION AND ...

引用

conference on digital video compression - algorithms and technologies 1995

作者： CHALOM, E BOVE, VM MIT MEDIA LABCAMBRIDGEMA 02139

ISBN: (纸本)0819417661

Motion-compensated video coders typically segment a scene into arbitrary tiles, resulting in a compressed bitstream which is not physically or semantically related to the scene structure. This paper presents a method for segmenting video frames and coding motion of regions, where the regions are defined in terms of a number of different properties. The goal is a video coder which gives good compression while identifying coherent regions in a manner useful for both human users and automated scene-understanding processes. Both a supervised and an unsupervised clustering algorithm are used to segment an image sequence; both algorithms make use of multiple features including motion, texture, position, and color. By utilizing both the structure and motion information, we preserve the semantic/structural content of the different regions, and simultaneously remove the redundancy (in successive frames) by describing the motion information in each region with a six-parameter affine model. In the supervised clustering algorithm, the first frame is manually segmented and used as training data. The classification of subsequent frames is done automatically, by using a MAP estimate, and modeling the n-dimensional feature-space as jointly Gaussian. The unsupervised algorithm is an iterative process that reassigns the classification of each point to the region corresponding to the nearest mean among each region of the segmentation from the previous iteration. In both algorithms, the distance and/or the mean is an n-dimensional measurement, n being the number of features used.

关键词： Image segmentation Optical flow video Motion models video compression Affine motion model Classification systems Image processing algorithms and systems Motion estimation Error analysis

来源：评论

学校读者我要写书评

暂无评论

VOLUME DATA compression USING SMOOTHED PARTICLE TRANSFORMATION

VOLUME DATA COMPRESSION USING SMOOTHED PARTICLE TRANSFORMATI...

引用

conference on digital video compression - algorithms and technologies 1995

作者： NAGASAWA, M HITACHI CRL ULTRA HIGH SPEED NETWORK & COMP TECHNOL LABSTOKYO 185JAPAN

ISBN: (纸本)0819417661

In 3D entertainment oriented games, most geometrical objects are represented by polygon sets. Thus, the handling of polygons is highly optimized in the hardware of graphic workstations. However, 3D scientific simulations do not ordinarily use polygon data but rather volume data in its original form, such as the scalar array p(x,y,z). If we had an effective volume data compression algorithm and a standard way of representing this data, it could be used in a more efficient manner in the network environment. This paper presents a Smoothed Particle Transformation (SPT) algorithm for volume data at several levels of compressed resolution from an original array description of a given variable. Representing data at various levels of detail is important for archiving the huge data in the network environment. SPT contributes not only to data compression but also for resolution rearrangement. As a result, it speeds up of the visualization of transferred data, especially for the direct volume rendering of compressed data.

关键词： compression TRANSFORMATION VOLUME DATA

来源：评论

学校读者我要写书评

暂无评论

A SEGMENTATION BASED SCHEME FOR VERY LOW BIT-RATE video CODING

A SEGMENTATION BASED SCHEME FOR VERY LOW BIT-RATE VIDEO CODI...

引用

conference on digital video compression - algorithms and technologies 1995

作者： BHASKARAN, V LI, W KUNT, M HEWLETT PACKARD CORP PALO ALTOCA 94304

ISBN: (纸本)0819417661

A video coding/decoding system for very low bitrate video has been developed. This hybrid coding scheme employs intraframe and interframe coding techniques. For intraframe coding, a wavelet-based method is used. For interframe coding motionestimation is employed to compute the displaced frame differences (DFD) and the DFD image is coded using a segmentation based method wherein the displaced frame is segmented into active and inactive regions. To meet the low bit rate requirements the motion vectors are processed so as to reduce their contribution to the overall bitrate. Preprocessing techniques are also employed to generate a smooth motion-vector field. To reduce the coding artifacts, post-processing techniques have been developed for use at the decoder. In this paper, we present simulation results for several typical video sequences coded at 16 kbits/sec and at 32 kbits/sec. © 1995 SPIE. All rights reserved.

关键词： Image coding

来源：评论

学校读者我要写书评

暂无评论

MULTIPLICATION FREE SCALED 8X8 DCT ALGORITHM WITH 530 ADDITIONS

MULTIPLICATION FREE SCALED 8X8 DCT ALGORITHM WITH 530 ADDITI...

引用

conference on digital video compression - algorithms and technologies 1995

作者： KASPEROVICH, L MOSCOW SPACE RES INST MOSCOW 117810RUSSIA

ISBN: (纸本)0819417661

The known idea of the rational DCT computations employs multiply approximation, where overall accuracy is not affected due to the rounding-off and truncations, which are intrinsic to the quantization process in the image/video compression. Besides higher computational efficiency, the multiplication free scheme can take advantage of the full-length processor word of 32-bit or newest 64-bit microprocessors, being applied to the packed pixel pairs. In this paper we propose the scaled DCT algorithm, that uses 30 `essential' multiplications by (root)2 and 64 `non-essential' by three constants (which are closed to 5, 3 and 2). The number of additions in the approximation version of the algorithm is considerably fewer than in the known multiplication free 8 X 8 DCT computational scheme. Other advantage of the algorithm is its symmetry, i.e. almost all the computational modules used in both forward and inverse DCT implementations are the same rather than transpositional ones. A performance of the software implementations of MJPEG codec for Pentium PC, based on the algorithm presented, as well as its applicability to the high resolution software-only playback in various video standards, is also discussed.

关键词： video Quantization Image compression Multimedia Semantic video video compression Algorithm development Image processing LCDs Matrices

来源：评论

学校读者我要写书评

暂无评论

FEASIBILITY OF video CODEC algorithms FOR SOFTWARE-ONLY PLAYBACK

FEASIBILITY OF VIDEO CODEC ALGORITHMS FOR SOFTWARE-ONLY PLAY...

引用

conference on digital video compression on Personal Computers: algorithms and technologies

作者： RODRIGUEZ, AA MORSE, K KALEIDA LABS INC MT VIEWCA 94043

ISBN: (纸本)0819414824

Software-only video codecs can provide good playback performance in desktop computers with a 486 or 68040 CPU running at 33 MHz without special hardware assistance. Typically, playback of compressed video can be categorized into three tasks: the actual decoding of the video stream, color conversion, and the transfer of decoded video data from system RAM to video RAM. By current standards, good playback performance is the decoding and display of video streams of 320 by 240 (or larger) compressed frames at 15 (or greater) frames-per- second. Software-only video codecs have evolved by modifying and tailoring existing compression methodologies to suit video playback in desktop computers. In this paper we examine the characteristics used to evaluate software-only video codec algorithms, namely: image fidelity (i.e., image quality), bandwidth (i.e., compression) ease-of-decoding (i.e., playback performance), memory consumption, compression to decompression asymmetry, scalability, and delay. We discuss the tradeoffs among these variables and the compromises that can be made to achieve low numerical complexity for software-only playback. Frame- differencing approaches are described since software-only video codecs typically employ them to enhance playback performance. To complement other papers that appear in this session of the Proceedings, we review methods derived from binary pattern image coding since these methods are amenable for software-only playback. In particular, we introduce a novel approach called pixel distribution image coding.

关键词： video video compression Computing systems Image compression Image quality Quantization Computer programming Data conversion video coding Binary data

来源：评论

学校读者我要写书评

暂无评论

FORWARD ADAPTIVE QUANTIZATION WITH OPTIMAL OVERHEAD COST FOR IMAGE AND video CODING WITH APPLICATIONS TO MPEG video CODERS

FORWARD ADAPTIVE QUANTIZATION WITH OPTIMAL OVERHEAD COST FOR...

引用

conference on digital video compression - algorithms and technologies 1995

作者： ORTEGA, A RAMCHANDRAN, K UNIV SO CALIF DEPT EE SYST & SIGNALLOS ANGELESCA 90089

ISBN: (纸本)0819417661

We address the problem of optimal forward-adaptive quantization in the video and image coding framework. In this framework, as is consistent with that of most practical coders like MPEG, the encoder has the capability of changing the quantizer periodically (e.g. at a macroblock interval in MPEG). In this paper, we formulate an optimal strategy, based on dynamic programming, for updating the quantizer choice for coding an image or video signal. While in some coding environments the overhead needed to specify the quantizer used by each block is equal for every choice of quantizer, in other situations (e.g. MPEG) the overhead cost is higher if the quantizer changes from one block to the next. We concentrate on the latter case which will be more likely encountered in situations where the overhead represents a significant fraction of the overall rate, as can be the case if a low bit rate is used (e.g. error frames in a typical motion-compensated video coder). We provide empirical evidence of the performance gain that can be obtained when applying our optimal algorithm to typical motion-compensated prediction error frames in MPEG, showing how the popular Viterbi algorithm can be used to find the optimal solution.

关键词： IMAGE compression video compression MPEG OVERHEAD BIT ALLOCATION QUANTIZATION

来源：评论

学校读者我要写书评

暂无评论

SCENE CHANGE DETECTION AND CONTENT-BASED SAMPLING OF video SEQUENCES

SCENE CHANGE DETECTION AND CONTENT-BASED SAMPLING OF VIDEO S...

引用

conference on digital video compression - algorithms and technologies 1995

作者： SHAHRARAY, B AT&T BELL LABS MACHINE PERCEPT RES DEPTHOLMDELNJ 07733

ISBN: (纸本)0819417661

digital images and image sequences (video) are a significant component of multimedia information systems, and by far the most demanding in terms of storage and transmission requirements. Content-based temporal sampling of video frames is proposed as an efficient method for representing the visual information contained in the video sequence by using only a small subset of the video frames. This involves the identification and retention of frames at which the contents of the scene is `significantly' different from the previously retained frames. It is argued that the criteria used to measure the significance of a change in the contents of the video frames are subjective, and performing the task of content-based sampling of image sequences, in general, requires a high level of image understanding. However, a significant subset of the points at which the contextual information in the video frames change significantly can be detected by a `scene change detection' method. The definition of a scene change is generalized to include not only the abrupt transitions between shots, but also gradual transitions between shots resulting from video editing modes, and inter-shot changes induced by camera operations. A method for detecting abrupt and gradual scene changes is discussed. The criteria for detecting camera-induced scene changes from camera operations are proposed. Scene matching is proposed as a means of achieving further reductions in the storage and transmission requirements.

关键词： Cameras video Signal detection digital filtering Image segmentation Information visualization Visualization Image processing Signal processing Motion estimation

来源：评论

学校读者我要写书评

暂无评论

TRANSFORM CODING FOR LOW BIT-RATE APPLICATIONS

TRANSFORM CODING FOR LOW BIT-RATE APPLICATIONS

引用

conference on digital video compression on Personal Computers: algorithms and technologies

作者： PONCELEON, DB WANG, KS WU, H NORMILE, J APPLE COMP INC CUPERTINOCA 95014

ISBN: (纸本)0819414824

Low bit rate image coding at 10 kbit/s and less is a difficult problem and does not appear possible with the current generation of block transform based methods. Current research efforts center around the use of transforms with less objectionable artifacts such as wavelets or model based methods. We examine a method that is transform based but captures specific features of the image to be represented. The transform uses principal component analysis to generate a basis set specific to the particular class of images to be coded. We present results from a transform designed for use in a `talking head' sequence. Significant improvement in reconstructed quality is shown when perceptual weighting is used in generating the basis set. The appendix includes details of computationally efficient methods for deriving the basis set as well as a description of the weighting method.

关键词： Signal to noise ratio Mouth Head video Eye Image compression Detection and tracking algorithms Facial recognition systems Image quality Principal component analysis

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38页 << < 1 2 3 4 5 6 7 8 9 10 > >>

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：