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Interactive reconstruction of virtual environments from video sequences

S. Gibson, R.J. Hubbold, J. Cook, T.L.J. Howard
2003 Computers & graphics  
The system combines an automatic camera calibration algorithm with an interactive model-building phase, followed by automatic extraction and synthesis of surface textures from frames of the video sequence  ...  In this paper, we describe a rapid and robust semi-automatic system that allows such environments to be quickly and easily built from video sequences captured with standard consumer-level digital cameras  ...  This research has been funded by the UK's Engineering and Physical Sciences Research Council (EPSRC), under Grant Number GR/M14531, ''REVEAL: Reconstruction of Virtual Environments with Accurate Lighting  ... 
doi:10.1016/s0097-8493(02)00285-6 fatcat:2qytbwii2jhoni4yqhamyqysm4

Augmented Reality Using Uncalibrated Video Sequences [chapter]

Kurt Cornelis, Marc Pollefeys, Maarten Vergauwen, Luc Van Gool
2001 Lecture Notes in Computer Science  
This paper will unfold how we proceeded to implement an Augmented Reality System that registers virtual objects into a totally uncalibrated video sequence of a real environment that may contain some moving  ...  Augmentations range from simple text annotations accompanying real objects to virtual mimics of reallife objects inserted into a real environment.  ...  Acknowledgements We wish to gratefully acknowledge the financial support of the ITEA99002 BEYOND project (performed with the support of the flemish district -IWT) and the FWO project G.0223.01.  ... 
doi:10.1007/3-540-45296-6_10 fatcat:t65vuvyixzgptj6vek4adoivt4

Augmented Real-Time Virtual Environment of the Church of the Holy Trinity in Mostar [article]

Belma Ramic-Brkic, Zana Karkin, Aida Sadzak, Dino Selimovic, Selma Rizvic
2009 VAST: International Symposium on Virtual Reality  
The paper describes how we improved the approach of inserting the real avatar recorded against a green screen using a sequence of images with an alpha channel in an X3D real time virtual environment.  ...  Digital storytelling significantly improves the immersion of the users into virtual environments.  ...  We would like to thank Professor Alan Chalmers from International Digital Laboratory, WMG, University of Warwick for lending us the Spheron panoramic camera and Dr Alessandro Artusi for creating the HDR  ... 
doi:10.2312/vast/vast09/141-148 fatcat:6hztucvbcfhj5hxkeq674roo5q

Real-Time 3D Reconstruction for Occlusion-Aware Interactions in Mixed Reality [chapter]

Alexander Ladikos, Nassir Navab
2009 Lecture Notes in Computer Science  
In addition, since we reconstruct the shape of every object, the users can use their entire body to interact with the virtual objects.  ...  We reconstruct the shape of all objects inside the interaction space using a visual hull method at a frame rate of 30 Hz.  ...  We use a video projector to display the reconstruction of the interaction space on a wall.  ... 
doi:10.1007/978-3-642-10331-5_45 fatcat:fuk2aoqiwzg4vk4235osuu6ie4

VideoPlus: A Method for Capturing the Structure and Appearance of Immersive Environments [chapter]

Camillo J. Taylor
2001 Lecture Notes in Computer Science  
By augmenting the video sequence with pose information, we provide the end-user with the ability to index the video sequence spatially as opposed to temporally.  ...  By augmenting the video sequence with pose information we provide the end user with the ability to index the video sequence spatially as opposed to temporally.  ...  Acquire an omnidirectional video sequence in the environment of interest. 2. Select a small set of keyframes from the sequence.  ... 
doi:10.1007/3-540-45296-6_13 fatcat:jayhbs2mcjfefokgdyrwkqag2u

3-D Virtual Studio for Natural Inter-"Acting"

N. Kim, W. Woo, G.J. Kim, C.-M. Park
2006 IEEE transactions on systems, man and cybernetics. Part A. Systems and humans  
Index Terms-Augmented reality, calibration, image segmentation, multiview and stereo cameras, registration, threedimensional (3-D) interaction, three-dimensional (3-D) model reconstruction, virtual environment  ...  Synthetic 3-D objects can be easily inserted and rendered, in real time, together with the 3-D environment and video actor for natural 3-D interaction.  ...  However, z-keying is mostly used for separating foreground objects from a video sequence in a blue-screen environment [7] , [12] .  ... 
doi:10.1109/tsmca.2005.855752 fatcat:u6plykwvv5hcbmyfrpp4pqmwai

Next generation image based lighting using HDR video

Jonas Unger, Stefan Gustavson, Joel Kronander, Per Larsson, Gerhard Bonnet, Gunnar Kaiser
2011 ACM SIGGRAPH 2011 Talks on - SIGGRAPH '11  
If necessary, the recovered model is then modified using an interaction scheme based on visualizations of a volumetric representation of the scene radiance computed from the input HDRV sequence.  ...  We present an overview of our recently developed systems pipeline for capture, reconstruction, modeling and rendering of real world scenes based on state-of-the-art high dynamic range video (HDRV).  ...  If necessary, the recovered model is then modified using an interaction scheme based on visualizations of a volumetric representation of the scene radiance computed from the input HDRV sequence.  ... 
doi:10.1145/2037826.2037906 dblp:conf/siggraph/UngerGKLBK11 fatcat:xurp5flgwbbgzfklqherxn5pk4

As-consistent-As-possible compositing of virtual objects and video sequences

Guofeng Zhang, Xueying Qin, Xiaobo An, Wei Chen, Hujun Bao
2006 Computer Animation and Virtual Worlds  
We present an efficient approach that merges the virtual objects into video sequences taken by a freely moving camera in a realistic manner.  ...  Most previous solutions of AR system concentrate on the geometry consistency of virtual and real scenes and thus require precise motion estimation of video camera and 3D models [4, 8] .  ...  Nakamae for the fruitful discussion in the early stage of this study. This paper is supported by  ... 
doi:10.1002/cav.134 fatcat:zuiarihhnjajta56dmhpyt5ls4

Quality of Experience for 3-D Immersive Media Streaming

Alexandros Doumanoglou, David Griffin, Javier Serrano, Nikolaos Zioulis, Truong Khoa Phan, David Jimenez, Dimitrios Zarpalas, Federico Alvarez, Miguel Rio, Petros Daras
2018 IEEE transactions on broadcasting  
Our focus is on tele-immersive media that embed real users within virtual environments of interactive games.  ...  Index Terms-Quality of experience (QoE), virtual reality (VR), immersive media, 3D content transmission, tele-immersion (TI), real-time 3D reconstruction, 3D streaming, free viewpoint video (FVV).  ...  of the 3D reconstructed appearance of the players inside the virtual environment.  ... 
doi:10.1109/tbc.2018.2823909 fatcat:kvaoxgemrvh4vnc32se3su7nfe

Image-based 3D acquisition of archaeological heritage and applications

Marc Pollefeys, Luc Van Gool, Maarten Vergauwen, Kurt Cornelis, Frank Verbiest, Jan Tops
2001 Proceedings of the 2001 conference on Virtual reality, archeology, and cultural heritage - VAST '01  
In this paper an approach is presented that obtains virtual models from sequences of images. The system can deal with uncalibrated image sequences acquired with a hand-held camera.  ...  From this both the structure of the scene and the motion of the camera are retrieved. The ambiguity on the reconstruction is restricted from projective to metric through auto-calibration.  ...  for us to deal with video footage of unprepared environments or archive video footage.  ... 
doi:10.1145/585031.585033 fatcat:fudtsx4un5bhxkbf3tp47whfze

Image-based 3D acquisition of archaeological heritage and applications

Marc Pollefeys, Luc Van Gool, Maarten Vergauwen, Kurt Cornelis, Frank Verbiest, Jan Tops
2001 Proceedings of the 2001 conference on Virtual reality, archeology, and cultural heritage - VAST '01  
In this paper an approach is presented that obtains virtual models from sequences of images. The system can deal with uncalibrated image sequences acquired with a hand-held camera.  ...  From this both the structure of the scene and the motion of the camera are retrieved. The ambiguity on the reconstruction is restricted from projective to metric through auto-calibration.  ...  for us to deal with video footage of unprepared environments or archive video footage.  ... 
doi:10.1145/584993.585033 dblp:conf/vast/PollefeysGVCVT01 fatcat:3z6y7pbl6zhyrpipbwe5a3adei

Application of 3D Human Motion in the Sports based on Computer Aided Analysis

Xuesi Huang
2015 Open Cybernetics and Systemics Journal  
3D human motion tracking is in recent years the field of machine vision is a very important research direction, it has a wide range of applications, such as human-computer interaction, intelligent animation  ...  Currently about three-dimensional human motion tracking research mostly based multicast video, monocular video due to the depth information of the lack of the 3D human motion tracking is more difficult  ...  In addition, video body frequently occluded or self occlusion, used to obtain video camera and its temporal and spatial resolu-tion is limited, and so on objective factors also makes from the video sequence  ... 
doi:10.2174/1874110x01509011728 fatcat:xqtmpuckajgnhewmthpebosm6m

Garment Replacement in Monocular Video Sequences

Lorenz Rogge, Felix Klose, Michael Stengel, Martin Eisemann, Marcus Magnor
2014 ACM Transactions on Graphics  
We reconstruct the actor's body shape and motion from the input video using a parameterized body model.  ...  The reconstructed dynamic 3D geometry of the actor serves as an animated mannequin for simulating the virtual garment.  ...  ACKNOWLEDGMENTS The research leading to these results has received funding from the European Unions Seventh Framework Programme FP7/2007-2013 under grant agreement no. 256941, Reality CG.  ... 
doi:10.1145/2634212 fatcat:crudba25orabpi4ihtz4fnf4de

EgoCap: Egocentric Marker-less Motion Capture with Two Fisheye Cameras (Extended Abstract) [article]

Helge Rhodin, Christian Richardt, Dan Casas, Eldar Insafutdinov, Mohammad Shafiei, Hans-Peter Seidel, Bernt Schiele, Christian Theobalt
2016 arXiv   pre-print
to a helmet or virtual-reality headset.  ...  We therefore propose a new method for real-time, marker-less and egocentric motion capture which estimates the full-body skeleton pose from a lightweight stereo pair of fisheye cameras that are attached  ...  social interactions, and (3) rendering the reconstruction of one's real body in virtual reality for embodied immersion. and a static background, but allows free roaming and was inspirational for our egocentric  ... 
arXiv:1701.00142v1 fatcat:aykkmmhqarasjgxbf3qtxssflu

Temporally And Spatially Varying Image Based Lighting Using Hdr-Video

Stefan Gustavson, Joel Kronander, Per Larsson, Jonas Unger, Anders Ynnerman
2013 Zenodo  
Publication in the conference proceedings of EUSIPCO, Marrakech, Morocco, 2013  ...  ACKNOWLEDGEMENTS The authors would like to thank Christian Bloch for rendering of the helicopter sequence displayed in Figure 4 .  ...  Fig. 4 . 4 Three frames from a video sequence of a virtual helicopter rendered using temporal IBL. The lighting measurement used in each frame is shown i the left upper corner.  ... 
doi:10.5281/zenodo.43628 fatcat:rlpnsbpubffyvmolnxrnl4s4zy
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