Filters








78 Hits in 3.9 sec

A Convenient Multicamera Self-Calibration for Virtual Environments

Tomáš Svoboda, Daniel Martinec, Tomáš Pajdla
2005 Presence - Teleoperators and Virtual Environments  
A convenient multi-camera self-calibration for virtual environments. Virtual immersive environments or telepresence setups often consist of multiple cameras which have to be calibrated.  ...  We present a convenient method for doing this. The minimum is three cameras, but there is no upper limit. The method is fully automatic and a freely moving bright spot is the only calibration object.  ...  cameras are needed for the self-calibration.  ... 
doi:10.1162/105474605774785325 fatcat:b4zv2wsrrbfp5buyo45hoxwdui

Self-calibration of Large Scale Camera Networks

Patrik Goorts, Steven Maesen, Yunjun Liu, Maarten Dumont, Philippe Bekaert, Gauthier Lafruit
2014 Proceedings of the 11th International Conference on Signal Processing and Multimedia Applications  
In this paper, we present a method to calibrate large scale camera networks for multi-camera computer vision applications in sport scenes.  ...  Experiments show that this removes a large amount of outliers before using existing calibration toolboxes dedicated to small scale camera networks, that would otherwise fail to work properly in finding  ...  A convenient multicamera self-calibration for virtual environments. Presence: Teleoperators & Virtual Environments, 14(4):407-422. Thomas, G. (2007).  ... 
doi:10.5220/0005057201070116 dblp:conf/sigmap/GoortsMLDBL14 fatcat:3ylqwy7q5vffvj4rusegeyu2wq

Multicamera Calibration from Visible and Mirrored Epipoles

Andrey Bushnevskiy, Lorenzo Sorgi, Bodo Rosenhahn
2016 2016 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)  
The real datasets have been captured using a multicamera Virtual Reality (VR) rig and a spherical dome configuration for 3D reconstruction.  ...  In this paper we propose a solution for the automatic recovery of the external calibration of a multicamera system by enforcing only simple geometrical constraints, arising from the epipole visibility,  ...  For a comparison purpose we have calibrated the system also using the Multi-Camera Self-Calibration tool (MCSC) [16] .  ... 
doi:10.1109/cvpr.2016.367 dblp:conf/cvpr/BushnevskiySR16 fatcat:6wyxc24mozdcnns2mli3om7jhy

MOTORIZED PANORAMIC CAMERA MOUNT – CALIBRATION AND IMAGE CAPTURE

H. Kauhanen, P. Rönnholm, V. V. Lehtola
2016 ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
For this purpose, we developed a novel mount calibration method, which allows an accurate recovery of the rotation centre in two image acquisition steps.  ...  In addition, we have built a motorized camera mount that can self-calibrate the camera position within the mount, given the previously solved rotation centre, and then be used to automatically capture  ...  In the future, we plan to replace the calibration rig with feature points obtained from arbitrary environments, so that the automated version of the method is as self-sustained as possible.  ... 
doi:10.5194/isprsannals-iii-5-89-2016 fatcat:dppxmhububhsvpcizqaovzcbgy

MOTORIZED PANORAMIC CAMERA MOUNT – CALIBRATION AND IMAGE CAPTURE

H. Kauhanen, P. Rönnholm, V. V. Lehtola
2016 ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
For this purpose, we developed a novel mount calibration method, which allows an accurate recovery of the rotation centre in two image acquisition steps.  ...  In addition, we have built a motorized camera mount that can self-calibrate the camera position within the mount, given the previously solved rotation centre, and then be used to automatically capture  ...  In the future, we plan to replace the calibration rig with feature points obtained from arbitrary environments, so that the automated version of the method is as self-sustained as possible.  ... 
doi:10.5194/isprs-annals-iii-5-89-2016 fatcat:wa5csainwbh6bhfgl424ecvp7m

Plane-based external camera calibration with accuracy measured by relative deflection angle

Chunhui Cui, King Ngi Ngan
2010 Signal processing. Image communication  
In this paper, we present an efficient external calibration technique for a typical multicamera system. The technique is very handy in practice using a simple planar pattern.  ...  In order to evaluate and compare the calibration results for different camera setups, a novel accuracy metric is introduced based on the deflection angles of projection rays.  ...  The work described in this paper was partially supported by a grant from the Research Grants Council of the Hong Kong SAR, China (Project CUHK415707).  ... 
doi:10.1016/j.image.2009.11.005 fatcat:6q54ke4d2fhqnbnpruhbqbqpi4

Multi-camera Control through Constraint Satisfaction for Persistent Surveillance

Faisal Z. Qureshi, Demetri Terzopoulos
2008 2008 IEEE Fifth International Conference on Advanced Video and Signal Based Surveillance  
In the design and empirical evaluation of our camera networks, we exploit a visually and behaviorally realistic virtual environment simulator that is populated by autonomous, lifelike virtual pedestrians  ...  We introduce a distributed camera coalition formation scheme for perceptive scene coverage and persistent surveillance by smart camera sensor networks.  ...  In particular, we employ a virtual train station environment populated by autonomous, lifelike virtual pedestrians, which was described in [16] .  ... 
doi:10.1109/avss.2008.37 dblp:conf/avss/QureshiT08 fatcat:534be4jmqjhmllzd6h5yjrykmm

Image-based interactive exploration of real-world environments

M. Uyttendaele, A. Criminisi, Sing Bing Kang, S. Winder, R. Szeliski, R. Hartley
2004 IEEE Computer Graphics and Applications  
These systems all aim to create a real sense of being there-a sense of virtual presence that lets users experience a space or environment in an exploratory, interactive manner.  ...  More recently, researchers have used such systems to present virtual tours and build 3D image-based environment models.  ...  Sing Bing Kang is a researcher at Microsoft Research. His research interests include environment modeling from images. Kang E X E C U T I V E S T A F F IEEE OFFICERS President: ARTHUR W. WINSTON  ... 
doi:10.1109/mcg.2004.1297011 pmid:15628073 fatcat:a4v2bwkxfbd3ddyjdy3hdf3z5e

Image-Based Rendering and Synthesis

S.C. Chan, Heung-Yeung Shum, King-To Ng
2007 IEEE Signal Processing Magazine  
This opens up many new and interesting research topics and applications, such as virtual view synthesis for three-dimensional (3-D) television (3DTV) and entertainment, high-performance imaging, video  ...  In particular, multiview systems normally require a large amount of storage and are rather difficult to construct.  ...  [16] , who used a subset of the Stanford multicamera array for acquiring and rendering dynamic scenes. The cameras were calibrated so that depth maps can be used to warp sample views to new views.  ... 
doi:10.1109/msp.2007.905702 fatcat:3kmgjchzbzainbhh7aqn7wpgie

Three-Dimensional Motion Estimation via Matrix Completion

Kun Li, Qionghai Dai, Wenli Xu, Jingyu Yang, Jianmin Jiang
2012 IEEE Transactions on Systems Man and Cybernetics Part B (Cybernetics)  
A "separating + merging" framework is introduced to multiview 3-D motion estimation. In the separating step, initial motions are first estimated for each view with a neighboring view.  ...  The most accurate motion estimation for each vertex in the recovered matrix is further selected by three spatiotemporal criteria.  ...  Liu for their useful suggestions and helpful discussions.  ... 
doi:10.1109/tsmcb.2011.2168953 pmid:22010156 fatcat:uypvpawihzecrie5ey42fzdf7u

Calibration of visual sensors and actuators in distributed computing platforms

E. Hörster, R. Lienhart, W. Kellermann, J.-Y. Bouguet
2005 Proceedings of the third ACM international workshop on Video surveillance & sensor networks - VSSN '05  
Many novel multimedia applications such as virtual immersive environments use multiple sensors and actuators.  ...  We present in this paper a novel approach for position calibration of visual sensors and actuators, i.e. cameras and displays, in a distributed network of general purpose computing devices.  ...  Such a setup demands a simple and convenient calibration approach to put all sensors and actuators into a common time and space.  ... 
doi:10.1145/1099396.1099401 fatcat:7lbe7oarjrhmpcme43m7g7coaq

Real‐time multi‐GPU‐based 8KVR stitching and streaming on 5G MEC/Cloud environments

HeeKyung Lee, Gi‐Mun Um, Seong Yong Lim, Jeongil Seo, Moonsung Gwak
2021 ETRI Journal  
In this study, we propose a multi-GPU-based 8KVR stitching system that operates in real time on both local and cloud machine environments.  ...  The proposed system first obtains multiple 4 K video inputs, decodes them, and generates a stitched 8KVR video stream in real time. The generated 8KVR  ...  Third, a calibration block extracts the frame set in config.xml, performs calibration with NVIDIA VRWorks 360 Video SDK [6] , and generates and stores calibration results, including internal and external  ... 
doi:10.4218/etrij.2021-0210 fatcat:2t35nb62fjbadndbhxk2ewggdi

UAV-Assisted Wide Area Multi-Camera Space Alignment Based on Spatiotemporal Feature Map

Jing Li, Yuguang Xie, Congcong Li, Yanran Dai, Jiaxin Ma, Zheng Dong, Tao Yang
2021 Remote Sensing  
In this paper, we investigate the problem of aligning multiple deployed camera into one united coordinate system for cross-camera information sharing and intercommunication.  ...  The proposed approach was evaluated in both simulation and real environments qualitatively and quantitatively.  ...  Database Database in simulation environment This paper utilizes AirSim [32] as the simulation platform to construct a suitable virtual scene for our system's performance verification.  ... 
doi:10.3390/rs13061117 fatcat:j3cqwl32e5cz7d47jj2c3n42t4

Image-based self-position and orientation method for moving platform

DeRen Li, Yong Liu, XiuXiao Yuan
2012 Science China Information Sciences  
Therefore, this paper firstly introduces state of the art development of the image-based self-position and orientation method (ISPOM) for moving platform from the following aspects: 1) A comparison among  ...  In such circumstances, image-based methods are very important for self-position and orientation of moving platform.  ...  Acknowledgements This work was supported by National Key Developing Program for Basic Sciences of China (Grant No. 2012CB-719902), and National Natural Science Foundation of China (Grant Nos. 41021061,  ... 
doi:10.1007/s11432-012-4649-9 fatcat:23fwr5dlijhv5ewsv6zxnw7yim

2021 Index IEEE Transactions on Instrumentation and Measurement Vol. 70

2021 IEEE Transactions on Instrumentation and Measurement  
The Author Index contains the primary entry for each item, listed under the first author's name.  ...  ., +, TIM 2021 5004615 A Convenient and High-Accuracy Multicamera Calibration Method Based on Imperfect Spherical Objects.  ...  ., +, TIM 2021 5012013 A Convenient and High-Accuracy Multicamera Calibration Method Based on Imperfect Spherical Objects.  ... 
doi:10.1109/tim.2022.3156705 fatcat:dmqderzenrcopoyipv3v4vh4ry
« Previous Showing results 1 — 15 out of 78 results