检索结果-内蒙古大学图书馆

Annual IEEE symposium on Field-Programmable Custom Computing Machines (FCCM)

作者： Reid Porter Jan Frigo Maya Gokhale Christophe Wolinski Francois Charot Charles Wagner Los Alamos National Laboratory Los Alamos NM USA IRISA IFSIC France

the authors propose a run-time re-configurable architecture for local neighborhood image processing. Discussion of how the new architecture can offer improved flexibility to the developer. the authors show that for a satellite image feature extraction application, our architecture, implemented on Stratix II and Virtex 2 field programmable gate arrays, achieves similar performance, hardware resource utilization, and throughput as fully pipelined systolic array architecture

关键词： throughput image processing Pixel Systolic arrays computer architecture Runtime Convolution Pipelines Color Field programmable gate arrays

来源：评论

学校读者我要写书评

暂无评论

SIBGTAPI 2005 XVIII brazilian symposium on computer graphics and image processing

SIBGTAPI 2005 XVIII Brazilian Symposium on Computer Graphics...

引用

SIBGRAPI 2005: 18th brazilian symposium on computer graphics and image processing - Conference Proceedings

ISBN: (纸本)0769523897

the proceedings contain 48 papers. the topics discussed include: on the effect in the convergence and quality of statistical image reconstruction for emission tomography using block-iterative algorithms;content-based diagnostic hysteroscopy summaries for video browsing;automatic iris segmentation using active near infra red lighting;curvature motion for union of balls;combining methods to stabilize and increase performance of neural network-based classifiers;a linear algorithm for exact pattern matching in planar subdivisions;an improved linear-parabolic model for lane following and curve detection;performance analysis of oriented feature detectors;computing box dimensions from single perspective images in real time;document reconstruction based on feature matching;determining the appropriate feature set for fish classification tasks;simple adaptive mosaic effects;and reduction of interband correlation of landsat image compression.

关键词： Technical presentations

来源：评论

学校读者我要写书评

暂无评论

Automatic Sliding Window Operation Optimization for FPGA-Based

Automatic Sliding Window Operation Optimization for FPGA-Bas...

引用

Annual IEEE symposium on Field-Programmable Custom Computing Machines (FCCM)

作者： Haiqian Yu Miriam Leeser Department of Electrical and Computer Engineering Northeastern University Boston MA USA

FPGA-based computing boards are frequently used as hardware accelerators for image processing algorithms based on sliding window operations (SWOs). SWOs are both computationally intensive and data intensive and benefit from hardware acceleration with FPGAs, especially for delay sensitive applications. the current design process requires that, for each specific application using SWOs with different size of window, image, etc.; a detail design must be completed before a realistic estimate of the achievable speedup can be obtained. We present an automated tool, sliding window operation optimization (SWOOP), that generates the estimate of speedup for a high performance design before detailed implementation is complete. the achievable speedup is determined by the area of the FPGA, or, more often, the memory bandwidth to the processing elements. the memory bandwidth to each processing element is a combination of bandwidth to the FPGA and the efficient use of on-chip RAM as a data cache. SWOOP uses analytic techniques to automatically determine the number of parallel processing elements to implement on the FPGA, the assignment of input and output data to on-board memory, and the organization of data in on-chip memory to most effectively keep the processing elements busy. the result is a block layout of the final design, its memory architecture, and a measure of the achievable speedup. the results, compared to manual designs, show that the estimates obtained usinq SWOOP are very accurate

关键词： Field programmable gate arrays Random access memory Bandwidth Hardware image processing Acceleration Delay Process design Design optimization Read-write memory

来源：评论

学校读者我要写书评

暂无评论

Proceedings of the XVIII brazilian symposium on computer graphics and image processing (SIBGRAPI'05): Preface

Proceedings - Brazialian Symposium on Computer Graphics and ...

引用

Proceedings - Brazialian symposium on computer graphics and image processing 2005年 2005卷 viii页

作者： Rodrigues, Maria Andreia Formico Frery, Alejandro C.

No abstract available

ISBN: (纸本)0769523897

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

Analytic antialiasing for selective high fidelity rendering

Analytic antialiasing for selective high fidelity rendering

引用

18th brazilian symposium on computer graphics and image processing (SIBGRAPI 2005)

作者： Longhurst, P Debattista, K Gillibrand, R Chalmers, A Univ Bristol Dept Comp Sci Bristol BS8 1UB Avon England

ISBN: (纸本)0769523897

images rendered using global illumination algorithms are considered amongst the most realistic in 3D computer graphics. However this high fidelity comes at a significant computational expense. A major part of this cost arises from the sampling required to eliminate aliasing errors. these errors occur due to the discrete sampling of continuous geometry space inherent to these techniques. In this paper we present a fast analytic method for predicting in advance where antialiasing needs to be computed. this prediction is based on a rapid visualisation of the scene using a GPU, which is used to drive a selective renderer We are able to significantly reduce the overall number of anitialiasing rays traced, producing an image that is perceptually indistinguishable from the high quality image at a much reduced computational cost.

关键词： image retrieval

来源：评论

学校读者我要写书评

暂无评论

An image-based shading pipeline for 2D animation

An image-based shading pipeline for 2D animation

引用

18th brazilian symposium on computer graphics and image processing (SIBGRAPI 2005)

作者： Bezerra, H Feijó, B Velho, L Pontificia Univ Catolica Rio de Janeiro Rio De Janeiro Brazil

ISBN: (纸本)0769523897

Shading for cel animation based on images is a recent research topic in computer-assisted animation. this paper proposes an image-based shading pipeline to give a 3D appearance to a 2D character by inspecting the hand-drawn image directly. the proposed method estimates normal vectors on the character's outline and interpolates them over the remaining image. the method does not limit the animator's creative process and requires minimal user intervention. the resulting shading pipeline can be easily applied to photorealistic and non-photorealistic 2D cel animation. In the proposed method, the animator can easily simulate environment reflections on the surface of 2D reflecting objects. As far as the authors are concerned, the proposed technique is the only one in the literature that is genuinely an image-based method for 2D animation.

关键词： cel animation non-photorealistic rendering image-based shading computer-assisted animation

来源：评论

学校读者我要写书评

暂无评论

Content-based diagnostic hysteroscopy summaries for video browsing

Content-based diagnostic hysteroscopy summaries for video br...

引用

18th brazilian symposium on computer graphics and image processing (SIBGRAPI 2005)

作者： Gaviao, W Scharcanski, J Univ Fed Rio de Janeiro Inst Informat BR-91501970 Porto Alegre RS Brazil

ISBN: (纸本)0769523897

In hospital practice, several diagnostic hysteroscopy videos are produced daily. these videos are continuous (non-interrupted) video sequences, usually recorded in full. However, only a few segments of the recorded videos are relevant from the diagnosis/prognosis point of view, and need to be evaluated and referenced later this paper proposes a new technique to identify clinically relevant segments in diagnostic hysteroscopy videos, producing a rich and compact video summary which supports fast video browsing. Also, our approach facilitates the selection of representative key-frames for reporting the video contents in the patient records. the proposed approach requires two stages. Initially, statistical techniques are used for selecting relevant video segments. then, a post-processing stage merges adjacent video segments that are similar reducing temporal video over-segmentation. Our preliminary experimental results indicate that our method produces compact video summaries containing a selection of clinically relevant video segments. these experimental results were validated by specialists.

关键词： computer aided diagnosis

来源：评论

学校读者我要写书评

暂无评论

Tie-zone watershed, bottlenecks and segmentation robustness analysis

Tie-zone watershed, bottlenecks and segmentation robustness ...

引用

18th brazilian symposium on computer graphics and image processing (SIBGRAPI 2005)

作者： Audigier, R de Alencar Lotufo, R Univ Estadual Campinas Sch Elect & Comp Engn Dept Comp Engn & Ind Automat BR-13083852 Campinas SP Brazil

ISBN: (纸本)0769523897

In a recent paper [1], a new type of watershed (WS) transfbrm was introduced: the tie-zone watershed (TZWS). this region-based watershed transform does not depend on arbitrary implementation and provides a unique (and thereby unbiased) optimal solution. Indeed, many optimal solutions are sometimes possible when segmenting an image by VVS. the TZWS assigns each pixel to a catchment basin (CB) if in all solutions it belongs to this CB. Otherwise, the pixel is said to belong to a tie-zone (TZ). An efficient algorithm computing the TZWS and based on the image Foresting Transform (IFT) was also proposed. In this article, we define the new concept of "bottle-necks" in the watermerging paradigm. Intuitively, the bottlenecks are the first contact points between at least two different wave fronts. the), are pixels in the image where different colored waters meet and tie and from which may begin, therefore, the tie-zones. they represent the origin points or the access of the tie-zones (regions that cannot be labeled without making arbitrary choices). If they are preferentially assigned to one or another colored water according to an arbitrary processing order as occurs in most of watershed algorithm, art entire region (its influence zone -the "bottle"!) is conquered together the bottlenecks play therefore an important role in the bias that could be introduced by a WS implementation. It is why we show in this paper that both tie-zones and bottlenecks analysis can be associated with the robustness of a segmentation.

关键词： image segmentation

来源：评论

学校读者我要写书评

暂无评论

Binary image operator design based on stacked generalization

Binary image operator design based on stacked generalization

引用

SIBGRAPI 2005: 18th brazilian symposium on computer graphics and image processing - Conference Proceedings

作者： Hirata, Nina S. T. Department of Computer Science Institute of Mathematics and Statistics University of São Paulo Rua do Matão 1010 05508-090 São Paulo Brazil

ISBN: (纸本)0769523897

Stacked generalization refers to any learning schema that consists of multiple levels of training. Level zero classifiers are those that depend solely on input data while classifiers at other levels may use the output of lower levels as the input. Stacked generalization can be used to address the difficulties related to the design of image operators defined on large windows. this paper describes a simple stacked generalization schema for the design of binary image operators and presents several application examples that show its effectiveness as a training schema. © 2005 IEEE.

关键词： Imaging systems

来源：评论

学校读者我要写书评

暂无评论

On the effect of relaxation in the convergence and quality of statistical image reconstruction for emission tomography using block-iterative algorithms

On the effect of relaxation in the convergence and quality o...

引用

SIBGRAPI 2005: 18th brazilian symposium on computer graphics and image processing - Conference Proceedings

作者： Neto, Elias Salomão Helou De Pierro, Álvaro Rodolfo Universidade Estadual de Campinas Inverse Problems Group IMECC

ISBN: (纸本)0769523897

Relaxation is widely recognized as a useful tool for providing convergence in block-iterative algorithms [1], [2], [6]. In the present article we give new results on the convergence of RAMLA (Row Action Maximum Likelihood Algorithm) [2], filling some important theoretical gaps. Furthermore, because RAMLA and OS-EM (Ordered Subsets - Expectation Maximization) [4] are the algorithms for statistical reconstruction currently being used in commercial emission tomography scanners, we present a comparison between them from the viewpoint of a specific imaging task. Our experiments show the importance of relaxation to improve image quality. © 2005 IEEE.

关键词： image reconstruction

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：