检索结果-内蒙古大学图书馆

IEEE Parallel visualization and Graphics Symposium

作者： K. Kreeger A. Kaufman Center for Visual Computing (CVC) and Department of Computer Science State University of New York Stony Brook NY USA

We propose a new paradigm for interactive volume visualization which allows enhanced exploration of datasets through the use of real-time volume processing (e.g., segmentation) tightly coupled with rendering. We show examples of how this paradigm supports a new way of examining a dataset by providing interactive visual feedback to segmentation parameter adjustment. We have developed a hardware co-processor, called PAVLOV, based on a SIMD mesh architecture. It supports our paradigm by providing volume processing at over 15 Hz while also rendering of the results at 30 Hz. We show how PAVLOV's programmability is used for volume processing applications, such as interactive segmentation and feature extraction. We further compare 3D segmentation on mesh architectures to known efficient methods for 2D segmentation.

关键词： visualization Feature extraction Frequency computer architecture computer science Feedback Coprocessors Personal communication networks Data engineering Volume measurement

来源：评论

学校读者我要写书评

暂无评论

Forward image mapping 99

Forward image mapping

引用

Proceedings of the conference on visualization '99: celebrating ten years

作者： Baoquan Chen Frank Dachille Arie Kaufman Center for Visual Computing (CVC) and Department of Computer Science State University of New York at Stony Brook Stony Brook NY

ISBN: (纸本)9780780358973

We present a new forward image mapping algorithm, which speeds up perspective warping — as in texture mapping. It processes the source image in a special scanline order instead of the normal raster scanline order. This special scanline has the property of preserving parallelism when projecting to the target image. The algorithm reduces the complexity of perspective-correct image warping by eliminating the division per pixel and replacing it with a division per scanline. The method also corrects the perspective distortion in Gouraud shading with negligible overhead. Furthermore, the special scanline order is suitable for antialiasing using a more accurate antialiasing conic filter, with minimum additional cost. The algorithm is highlighted by incremental calculations and optimized memory bandwidth by reading each source pixel only once, suggesting a potential hardware implementation.

关键词： Gouraud shading forward mapping anisotropic filtering hardware texture mapping image warping antialiasing

来源：评论

学校读者我要写书评

暂无评论

Mixing translucent polygons with volumes 99

Mixing translucent polygons with volumes

引用

Proceedings of the conference on visualization '99: celebrating ten years

作者： Kevin Kreeger Arie Kaufman Center for Visual Computing (CVC) and Department of Computer Science State University of New York at Stony Brook Stony Brook NY

ISBN: (纸本)9780780358973

We present an algorithm which renders opaque and/or translucent polygons embedded within volumetric data. The processing occurs such that all objects are composited in the correct order, by rendering thin slabs of the translucent polygons between volume slices using slice-order volume rendering. We implemented our algorithm with OpenGL on current general-purpose graphics systems. We discuss our system implementation, speed and image quality, as well as the renderings of several mixed scenes.

关键词： ray casting mixing polygons and volumes volume rendering translucent polygon rendering voxelization

来源：评论

学校读者我要写书评

暂无评论

Haptic sculpting of dynamic surfaces 99

Haptic sculpting of dynamic surfaces

引用

Proceedings of the 1999 symposium on Interactive 3D graphics

作者： Frank Dachille Hong Qin Arie Kaufman Jihad El-Sana Center for Visual Computing (CVC) and Department of Computer Science State University of New York at Stony Brook Stony Brook NY

来源：评论

学校读者我要写书评

暂无评论

Optimized Interpolation for Volume Ray Casting

引用

Journal of graphics tools 1999年第1期4卷 11-24页

作者： Ming Wan Arie Kaufman Steve Bryson [a]Center for Visual Computing (CYC) and Department of Computer Science State University of New York at Stony Brook Stony Brook NY 11794-4400 E-mail: [b]Center for Visual Computing (CYC) and Department of Computer Science State University of New York at Stony Brook Stony Brook NY 11794-4400 E-mail: [c]NASA Ames Research Center Moffett Field CA 94035-1000 E-mail:

An acceleration technique using bilinear and simplified trilinear interpolation which reduces the amount of interpolation computation during the ray sampling procedure of the volume ray casting algorithm is described. It has several characteristics: It is applicable to both perspective projection and parallel projection; it uses almost no extra space and processing power; there is no noticeable sacrifice of image quality; and more importantly, it can be easily applied to existing ray casting optimizations to further improve their efficiency. In addition, an adaptive depthsampling optimization has been developed based on our technique, which serves as an effective approach to meet the frame rate demand of time-critical visualization environment. Experimental results show that a rendering rate of more than ten frames per second has been achieved on a 16-processor SGI Power Challenge.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Volume rendering based interactive navigation within the human colon (case study) 99

Volume rendering based interactive navigation within the hum...

引用

Proceedings of the conference on visualization '99: celebrating ten years

作者： Ming Wan Qingyu Tang Arie Kaufman Zhengrong Liang Mark Wax Center for Visual Computing (CVC) and Departments of Computer Science and Radiology State University of New York at Stony Brook Stony Brook NY

ISBN: (纸本)9780780358973

We present an interactive navigation system for virtual colonoscopy, which is based solely on high performance volume rendering. Previous colonic navigation systems have employed either a surface rendering or a Z-buffer-assisted volume rendering method that depends on the surface rendering results. Our method is a fast direct volume rendering technique that exploits distance information stored in the potential field of the camera control model, and is parallelized on a multiprocessor. Experiments have been conducted on both a simulated pipe and patients' data sets acquired with a CT scanner.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Volume rendering based interactive navigation within the human colon

Volume rendering based interactive navigation within the hum...

引用

IEEE Conference on visualization

作者： M. Wan Q. Tang A. Kaufman Z. Liang M. Wax Center for Visual Computing (CVC)and Departments of Computer Science and Radiology State University of New York Stony Brook Stony Brook NY USA

ISBN: (纸本)078035897X

关键词： Humans Colon Virtual colonoscopy Colonography Cancer Colonic polyps Radio navigation Computed tomography Abdomen Rendering (computer graphics)

来源：评论

学校读者我要写书评

暂无评论

High performance presence-accelerated ray casting

High performance presence-accelerated ray casting

引用

IEEE Conference on visualization

作者： M. Wan A. Kaufman S. Bryson Center for Visual Computing and Department of Computer Science State University of New York Stony Brook NY USA NASA Ames Research Center Moffett Field CA USA

ISBN: (纸本)078035897X

We present a novel presence acceleration for volumetric ray casting. A highly accurate estimation for object presence is obtained by projecting all grid cells associated with the object boundary on the image plane. Memory space and access time are reduced by run-length encoding of the boundary cells, while boundary cell projection time is reduced by exploiting projection templates and multiresolution volumes. Efforts have also been made towards a fast perspective projection as well as interactive classification. We further present task partitioning schemes for effective parallelization of both boundary cell projection and ray traversal procedures. Good load balancing has been reached by taking full advantage of both the optimizations in the serial rendering algorithm and shared-memory architecture. Our experimental results on a 16-processor SGI Power Challenge have shown interactive rendering rates for 256/sup 3/ volumetric data sets at 10-30 Hz. We describe the theory and implementation of our algorithm, and shows its superiority over the shear-warp factorization approach.

关键词： Casting Electrical capacitance tomography Acceleration Encoding Load management Spatial resolution computer science NASA Partitioning algorithms Memory architecture

来源：评论

学校读者我要写书评

暂无评论

High performance presence-accelerated ray casting 99

High performance presence-accelerated ray casting

引用

Proceedings of the conference on visualization '99: celebrating ten years

作者： Ming Wan Arie Kaufman Steve Bryson Center for Visual Computing (CVC) and Department of Computer Science State University of New York at Stony Brook Stony Brook NY NASA Ames Research Center Moffett Field CA

ISBN: (纸本)9780780358973

We present a novel presence acceleration for volumetric ray casting. A highly accurate estimation for object presence is obtained by projecting all grid cells associated with the object boundary on the image plane. Memory space and access time are reduced by run-length encoding of the boundary cells, while boundary cell projection time is reduced by exploiting projection templates and multiresolution volumes. Efforts have also been made towards a fast perspective projection as well as interactive classification. We further present task partitioning schemes for effective parallelization of both boundary cell projection and ray traversal procedures. Good load balancing has been reached by taking full advantage of both the optimizations in the serial rendering algorithm and shared-memory architecture. Our experimental results on a 16-processor SGI Power Challenge have shown interactive rendering rates for 2563 volumetric data sets at 10 - 30 Hz. This paper describes the theory and implementation of our algorithm, and shows its superiority over the shear-warp factorization approach.

关键词： interactive classification

来源：评论

学校读者我要写书评

暂无评论

Real-time Biomechanically-based Muscle Volume Deformation using FEM

引用

computer Graphics Forum 1998年第3期17卷 C274-C284页

作者： Zhu, Qing-Hong Chen, Yan Kaufman, Arie Center for Visual Computing Department of Computer Science State Univ. New York at Stony Brook Stony Brook NY 11794-4400 United States

This paper presents a voxel-based biomechanical model for muscle deformation using finite element method (FEM) and volume graphics. Hierarchical voxel meshes are reconstructed from filtered segmented muscle images followed by FEM simulation and volume rendering. Physiological muscle force is considered and linear elastic muscle models for both static and dynamic cases are simulated by FEM. Voxel-based wireframe, polygon surface rendering, and volume rendering techniques are applied to show real-time muscle deformation processes as well as realistic animations.

关键词： voxel-based biomechanically-based muscle modeling real-time muscle simulation finite element method hierarchical representation volume graphics volumetric deformation

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：