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Reliable Fly-Throughs of Vascular Trees

by Aly A. Farag, M. Sabry Hassouna, Robert Falk, Stephen Hushek
"... Centerline Extraction of curvilinear objects is a crucial component of virtual endoscopy (VE), because it provides a path planning for both automatic and interactive navigation. During navigation, centerlines must be connected, smooth, and centered. Preserving connectivity was always a problem to ma ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
method is introduced to guarantee one voxel wide centerlines with no 2D manifolds or 3D self intersect. Finally, we build a tree graph of centerlines that provides useful information during navigation, especially, when it is

Virtual flythrough over a voxel-based terrain

by Ming Wan, Huamin Qu, Arie Kaufman - IEEE Conference on Virtual Reality (VR-99 , 1999
"... A voxel-based terrain visualization system is presented with real-time performance on general-purpose graphics multiprocessor workstations. Ray casting of antialiased 3D volume terrain and subvoxel sampling in true 3D space pro-duce high quality images. Based on this rendering algo-rithm, an interac ..."
Abstract - Cited by 7 (5 self) - Add to MetaCart
A voxel-based terrain visualization system is presented with real-time performance on general-purpose graphics multiprocessor workstations. Ray casting of antialiased 3D volume terrain and subvoxel sampling in true 3D space pro-duce high quality images. Based on this rendering algo

Make3D: Learning 3D Scene Structure from a Single Still Image

by Ashutosh Saxena, Min Sun, Andrew Y. Ng
"... We consider the problem of estimating detailed 3-d structure from a single still image of an unstructured environment. Our goal is to create 3-d models which are both quantitatively accurate as well as visually pleasing. For each small homogeneous patch in the image, we use a Markov Random Field (M ..."
Abstract - Cited by 158 (19 self) - Add to MetaCart
of a number of small planes, our model makes no explicit assumptions about the structure of the scene; this enables the algorithm to capture much more detailed 3-d structure than does prior art, and also give a much richer experience in the 3-d flythroughs created using image-based rendering, even

Virtual Sardinia: a Hypermedia Fly-through with Real Data

by Enrico Gobbetti, Andrea O. Leone, Alberto Marini - IN PROCEEDINGS OF THE INTERNATIONAL WORKSHOP ON SOFT COMPUTING IN REMOTE SENSING DATA ANALYSIS (CONFERENCE HELD IN , 1995
"... The Virtual Sardinia project aims at collecting a large amount of heterogeneous data concerning the island of Sardinia and representing them in such a way that a casual user can easily navigate through them in a virtual trip. All these data are interconnected in an hypermedia way, browsable in the W ..."
Abstract - Cited by 2 (2 self) - Add to MetaCart
in the World-wide Web, ranging from geographic to archaeological data, from historical to touristical info, both in 2D and 3D. The central component of Virtual Sardinia is i3D, a high-speed 3D scene viewer for the Vorld-wide Veb. Using a Spaceball, the user can intuitively navigate with continuous viewpoint

Differential fly-throughs (DFT): A general framework for computing flight paths

by M. Sabry Hassouna, A. A. Farag, Robert Falk - Proc. of MICCAI (Medical Image Computing and Computer-Assisted Intervention , 2005
"... Abstract. In this paper, we propose a new variational framework based on distance transform and gradient vector flow, to compute flight paths through tubular and non-tubular structures, for virtual endoscopy. The proposed framework propagates two wave fronts of different speeds from a point source v ..."
Abstract - Cited by 8 (3 self) - Add to MetaCart
voxel, which belongs to the medial curves of the anatomical structure. The first wave traverses the 3D structure with a moderate speed that is a function of the distance field to extract its topology, while the second wave propagates with a higher speed that is a function of the magnitude

PUBLIC OUTREACH THROUGH GIS

by Tim Witt
"... In this paper, I propose a few ways, by using GIS tools, to improve public outreach by Dog River Clearwater Revival. With the use of the internet and the easy access to web page and programs like Google Earth, a plain satellite image might not get the interest of the public anymore. You do not need ..."
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3D Flythrough of Halls Mill Creek, which is a tributary of Dog River. After creating the 3D flythrough, I uploaded it to youtube.com, so the public can access it easily. I used ArcGIS to make the basic maps and ArcScene to create the 3D flythrough of Halls Mill Creek. These maps can be used to show

Keywords: Image-based Modeling, Single Image 3D reconstruction, Machine Learning

by Ashutosh Saxena, Nuwan Senaratna, Savil Srivastava, Andrew Y. Ng
"... algorithm. (d) A screenshot of the textured 3-d model. (Also see attached video.) We present a method to create photorealistic 3D models from a single still image. The user provides input in the form of “scribbles”— within a few seconds of user input, our algorithm generates a photorealistic 3D mode ..."
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model and a 3D flythrough from the image. Our approach uses a machine learning algorithm that learns the relation between (single) image features and depth. In our preliminary experiments, 1238 users created good 3D models for 84 % of the 3775 images they uploaded.

Learning 3-d scene structure from a single still image

by Ashutosh Saxena, Min Sun, Andrew Y. Ng - in ICCV workshop on 3D Representation for Recognition (3dRR07 , 2007
"... We consider the problem of estimating detailed 3-d structure from a single still image of an unstructured environment. Our goal is to create 3-d models which are both quantitatively accurate as well as visually pleasing. For each small homogeneous patch in the image, we use a Markov Random Field (MR ..."
Abstract - Cited by 48 (13 self) - Add to MetaCart
as Saxena et al., 2005, Delage et al., 2005, and Hoiem et el., 2005), and also give a much richer experience in the 3-d flythroughs created using image-based rendering, even for scenes with significant non-vertical structure. Using this approach, we have created qualitatively correct 3-d models for 64

Subject Explorer 3D: a Virtual Reality Collection Browsing and Searching Tool

by Charles-antoine Catherine Guastavino, France Bouthillier, John E
"... Abstract: Controlled vocabulary is known to help searchers and Semantic Web ontologies are one of its latest incarnations. Unfortunately, many searchers are unaware of this useful organization of information. An interactive 3D fly-through search and browsing prototype was developed and is proposed a ..."
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Abstract: Controlled vocabulary is known to help searchers and Semantic Web ontologies are one of its latest incarnations. Unfortunately, many searchers are unaware of this useful organization of information. An interactive 3D fly-through search and browsing prototype was developed and is proposed

Multiperspective Panoramas for Cel Animation

by Daniel N. Wood, Adam Finkelstein, John F. Hughes, Craig E. Thayer, David H. Salesin, Daniel N. Wood Adam Finkelstein , 1997
"... We describe a new approach for simulating apparent camera motion through a 3D environment. The approach is motivated by a traditional technique used in 2D cel animation, in which a single background image, which we call a multiperspective panorama,is used to incorporate multiple views of a 3D envir ..."
Abstract - Cited by 116 (6 self) - Add to MetaCart
should also be useful for any application in which predefined camera moves are applied to 3D scenes, including virtual reality fly-throughs, computer games, and architectural walk-throughs. CR Categories: I.3.3 [Computer Graphics]: Picture/Image Generation. Additional Keywords: CGI production
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