Results 1 - 10 of 3,812

Parsing Indoor Scenes Using RGB-D Imagery

by Camillo J. Taylor, Anthony Cowley
"... Abstract—This paper presents an approach to parsing the Manhattan structure of an indoor scene from a single RGB-D frame. The problem of recovering the floor plan is recast as an optimal labeling problem which can be solved efficiently using Dynamic Programming. I. ..."
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Abstract—This paper presents an approach to parsing the Manhattan structure of an indoor scene from a single RGB-D frame. The problem of recovering the floor plan is recast as an optimal labeling problem which can be solved efficiently using Dynamic Programming. I.

Depth And Motion Discontinuities

by Stanley Thomas Birchfield , 1999
"... Depth and motion discontinuities arise wherever a light ray incident on a camera sensor meets a discrete change in the depth or motion of the surfaces in the world. Because these discontinuities tend to coincide with occlusions and with the boundaries of objects, they provide useful information for ..."
Abstract - Cited by 25 (1 self) - Add to MetaCart
to detect depth discontinuities from a stereo pair of images by matching pixels in corresponding scanlines and then propagating information between those scanlines. It uses a new measure of pixel dissimilarity that is provably insensitive to image sampling. The algorithm is fast and is shown to produce good

Selecting Stable Image Features for Robot Localization Using Stereo

by James J. Little, Jiping Lu, Don R. Murray , 1998
"... To navigate and recognize where it is, a mobile robot must be able to identify its current location. In an unknown initial position, a robot needs to refer to its environment to determine its location in an external coordinate system. Even with a known initial position, drift in odometry causes the ..."
Abstract - Cited by 12 (1 self) - Add to MetaCart
the estimated position to deviate from the correct position, requiring correction. We show how to find landmarks without models. We use dense stereo data from our mobile robot's trinocular system to discover image regions that will be stable over widely differing viewpoints. We find image brightness "

Registration and Integration of Textured 3-D Data

by Andrew Johnson, Sing Bing Kang - IMAGE AND VISION COMPUTING , 1996
"... In general, multiple views are required to create a complete 3-D model of an object or a multiroomed indoor scene. In this work, we address the problem of merging multiple textured 3-D data sets, each of which corresponding to a different view of a scene or object. There are two steps to the merging ..."
Abstract - Cited by 106 (3 self) - Add to MetaCart
In general, multiple views are required to create a complete 3-D model of an object or a multiroomed indoor scene. In this work, we address the problem of merging multiple textured 3-D data sets, each of which corresponding to a different view of a scene or object. There are two steps

Services for Indoor Use

by Krzysztof W. Kolodziej, Krzysztof W. Kolodziej, Mass-achuses Instite, Heifli Nepf, Krzysztof W. Kolodziej , 2004
"... Certified by................................C e rtifi e d b y...........................................................J r m o n n r.....................Jerm onnorJhesis Reader Professor of Ci- ^ Accepted by................................................. GrdaeSuet ..."
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Certified by................................C e rtifi e d b y...........................................................J r m o n n r.....................Jerm onnorJhesis Reader Professor of Ci- ^ Accepted by................................................. GrdaeSuet

Title of Study: APPLICATION OF COMPUTATIONAL FLUID DYNAMICS TO INDOOR ROOM AIR FLOW

by Master Of Science, Michael Ramey
"... Scope of Study: This study uses a FORTRAN computer code which simulates room air flow using a laminar model, a turbulent k-ε model with wall functions and a turbulent low-Reynolds k-ε model. The room dimensions are 4.6 x 2.75 x 2.75 m. A variable grid spacing option has been implemented into the co ..."
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Scope of Study: This study uses a FORTRAN computer code which simulates room air flow using a laminar model, a turbulent k-ε model with wall functions and a turbulent low-Reynolds k-ε model. The room dimensions are 4.6 x 2.75 x 2.75 m. A variable grid spacing option has been implemented

A Beam Tracing Approach to Acoustic Modeling for Interactive Virtual Environments

by Thomas Funkhouser , Ingrid Carlbom, Gary Elko, Gopal Pingali, Mohan Sondhi , Jim West , 1998
"... Virtual environment research has focused on interactive image generation and has largely ignored acoustic modeling for spatialization of sound. Yet, realistic auditory cues can complement and enhance visual cues to aid navigation, comprehension, and sense of presence in virtual environments. A prima ..."
Abstract - Cited by 108 (14 self) - Add to MetaCart
primary challenge in acoustic modeling is computation of reverberation paths from sound sources fast enough for real-time auralization. We have developed a system that uses precomputed spatial subdivision and "beam tree" data structures to enable real-time acoustic modeling and auralization

scale Image-based Modeling · 3D Reconstruction

by Jianxiong Xiao, Yasutaka Furukawa, Jianxiong Xiao, Yasutaka Furukawa, Google Streetview, Google Mapsgl
"... Abstract Virtual exploration tools for large indoor environ-ments (e.g. museums) have so far been limited to either blueprint-style 2D maps that lack photo-realistic views of scenes, or ground-level image-to-image transitions, which are immer-sive but ill-suited for navigation. On the other hand, ph ..."
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, photo-realistic aerial maps would be a useful navigational guide for large indoor environments, but it is impossible to di-rectly acquire photographs covering a large indoor environ-ment from aerial viewpoints. This paper presents a 3D re-construction and visualization system for automatically pro

Fast Omnidirectional 3D Scene Acquisition with an Array of Stereo Cameras

by Jiajun Zhu, Greg Humphreys, David Koller
"... We present an omnidirectional 3D acquisition system based on a mobile array of high-resolution consumer digital SLR cameras that automatically capture high dynamic range stereo pairs across a full 360-degree panorama. The stereo pairs are augmented with a time-varying lighting pattern created using ..."
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standard photographic flashes, lenses, and patterned slides. Spacetime stereo techniques are used to generate 3D range images with corresponding color data from the HDR photographs. The multiple range images are aligned with egomotion estimation and ICP registration techniques, and volumetric merging

Collision-Free Navigation for Blind Persons using Stereo Matching

by Saeid Fazli, Hajar Mohammadi D
"... Abstract — A blind person in an urban environment has to navigate around obstacles and hazards. Though a significant amount of work has been done on detecting obstacles, not much attention has been given to the detection of drop offs, e.g., sidewalk curbs, downward stairs, and other hazards where an ..."
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an error could lead to disastrous consequences. In this paper, we propose algorithms for detecting obstacles in an urban setting using stereo vision and Two-Stage Dynamic Programming (TSDP) technique. We are developing computer vision algorithms for sensing important terrain features as an aid to blind
Results 1 - 10 of 3,812