Filters








440 Hits in 3.7 sec

Reconstruction of the Pose of Uncalibrated Cameras via User-Generated Videos

Stuart Bennett, Joan Lasenby, Anil Kokaram, Sasi Inguva, Neil Birkbeck
2014 Proceedings of the International Conference on Distributed Smart Cameras - ICDSC '14  
We have built a prototype system to allow a user to spatially navigate playback viewpoints of an event of interest, using geometry automatically recovered from casually captured videos.  ...  Extraction of 3D geometry from hand-held unsteady uncalibrated cameras faces multiple difficulties: finding usable frames, featurematching and unknown variable focal length to name three.  ...  The n frames captured by the moving camera may instead be seen as n static cameras each capturing one frame, which is not dissimilar to the user-generated video problem posed above.  ... 
doi:10.1145/2659021.2659028 dblp:conf/icdsc/BennettLKIB14 fatcat:bl6n4bvstnevbeu2oa7qpok4ia

Real-World Visual Computing (Dagstuhl Seminar 13431)

Oliver Grau, Marcus A. Magnor, Olga Sorkine-Hornung, Christian Theobalt, Marc Herbstritt
2014 Dagstuhl Reports  
Also, the pervasiveness of smart-phones containing camera, GPS and orientation sensors allows for developing new capturing paradigms of real-world events based on a swarm of networked smart-phones.  ...  One promising alternative consists of creating digital models from real-world examples if ways can be found how to endow reconstructed models with the flexibility customary in computer graphics.  ...  From a monocular video sequence the actors body shape and pose is reconstructed using a parameterized body model.  ... 
doi:10.4230/dagrep.3.10.72 dblp:journals/dagstuhl-reports/GrauMST13 fatcat:erkmydoib5f7rezs6xgsauw4wm

3D Human Motion Reconstruction Using Video Processing [chapter]

Nadiya Roodsarabi, Alireza Behrad
2008 Lecture Notes in Computer Science  
In this paper, a new method for reconstruction of human motion from the image sequence of a single static camera is described.  ...  One of the important problems in human motion analysis is the 3D reconstruction of human motion, which utilizes the anatomic point's positions.  ...  In Section 3 we give an overview of the algorithm of reconstructing 3D human motion using sequences of images acquired with a single video camera.  ... 
doi:10.1007/978-3-540-69905-7_44 fatcat:r3ceix2vfjcyzkesllsmopyivu

Free viewpoint video synthesis and presentation from multiple sporting videos

Naho Inamoto, Hideo Saito
2006 Electronics and communications in Japan. Part 3, Fundamental electronic science  
In the second system (Mixed Reality Presentation System), a user can virtually watch the scenes overlaid on a desktop stadium model via a video see-through head mounted display (HMD).  ...  This paper introduces two kinds of free viewpoint observation systems for sporting events captured with uncalibrated multiple cameras in a stadium.  ...  Acknowledgments This work is supported in part by a Grant in Aid for the 21st century Center of Excellence for Optical and Electronic Device Technology for Access Network from the Ministry of Education  ... 
doi:10.1002/ecjc.20311 fatcat:qfw4bjond5fefnt2ar7uzjvtci

Modeling 3D human poses from uncalibrated monocular images

Xiaolin K. Wei, Jinxiang Chai
2009 2009 IEEE 12th International Conference on Computer Vision  
We show the algorithm can accurately reconstruct 3D poses and camera parameters from a wide variety of real images, including internet photos and key frames extracted from monocular video sequences.  ...  This paper introduces an efficient algorithm that reconstructs 3D human poses as well as camera parameters from a small number of 2D point correspondences obtained from uncalibrated monocular images.  ...  Conclusion We present a new technique for simultaneous reconstruction of 3D articulated poses and camera parameters from uncalibrated monocular images.  ... 
doi:10.1109/iccv.2009.5459415 dblp:conf/iccv/WeiC09 fatcat:owls73fox5di3hrcq4yye3zkmy

Real-time video-based rendering from uncalibrated cameras using plane-sweep algorithm

Songkran Jarusirisawad, Vincent Nozick, Hideo Saito
2010 Journal of Visual Communication and Image Representation  
In this paper, we present a new online video-based rendering (VBR) method that creates new views of a scene from uncalibrated cameras.  ...  We succeed to create novel view images in real-time from uncalibrated cameras and the results show the efficiency of our proposed method.  ...  In contrast, free viewpoint video is a system for viewing a video of a real-world event, allowing the user to control the viewpoint and generate new views of a dynamic scene from the desired 3D position  ... 
doi:10.1016/j.jvcir.2010.01.005 fatcat:p74ihqxamzfvbl3anvtkq3koje

Key Issues in Modeling of Complex 3D Structures from Video Sequences

Shengyong Chen, Yuehui Wang, Carlo Cattani
2012 Mathematical Problems in Engineering  
Reconstruction of a scene object from video sequences often takes the basic principle of structure from motion with an uncalibrated camera.  ...  Construction of three-dimensional structures from video sequences has wide applications for intelligent video analysis.  ...  Acknowledgments This work was supported by the National Natural Science Foundation of China and Microsoft Research Asia NSFC nos. 61173096, 60870002, and 60802087 , Zhejiang Provincial S&T Department 2010R10006  ... 
doi:10.1155/2012/856523 fatcat:2tcnq4tllvf4rpgurxuli2vci4

Real-time free viewpoint video from uncalibrated cameras using plane-sweep algorithm

Songkran Jarusirisawad, Hideo Saito, Vicent Nozick
2009 2009 IEEE 12th International Conference on Computer Vision Workshops, ICCV Workshops  
In this paper, we present a new online video-based rendering (VBR) method that creates new views of a scene from uncalibrated cameras.  ...  We succeed to create novel view images in real-time from uncalibrated cameras and the results show the efficiency of our proposed method.  ...  Acknowledgment This work has been supported by "Foundation of Technology Supporting the Creation of Digital Media Contents" project (CREST, JST), Japan.  ... 
doi:10.1109/iccvw.2009.5457493 dblp:conf/iccvw/JarusirisawadSN09 fatcat:h4n5ue36j5fn5f2pytvosif7wm

RotoTexture: Automated Tools for Texturing Raw Video

Hui Fang, J.C. Hart
2006 IEEE Transactions on Visualization and Computer Graphics  
Abstract-We propose a video editing system that allows a user to apply a time-coherent texture to a surface depicted in the raw video from a single uncalibrated camera, including the surface texture mapping  ...  Rototexture also adds the ability to map an image onto the depiction of a surface in a photograph or video, demonstrated by the shirt's Da Vinci image whose deformation follows the wrinkles.  ...  Other than their reputations, no graduate students were harmed in the performance of this research.  ... 
doi:10.1109/tvcg.2006.102 pmid:17073379 fatcat:zjnugu6vyzhirjtagg3q7bdlta

Real-time Upper Body 3D Pose Estimation from a Single Uncalibrated Camera [article]

Antonio Salvatore Micilotta, Eng Jon Ong, Richard Bowden
2005 Eurographics State of the Art Reports  
The present exposition is made for an obstacle-free context.This paper outlines a method of estimating the 3D pose of the upper human body from a single uncalibrated camera.  ...  pose.  ...  Statistical methods of reconstructing the 3D pose from a monocular sequence track multiple body points and compute prior probabilities of 3D motions with the aid of training data [BM00, HLF00] .  ... 
doi:10.2312/egs.20051019 fatcat:v6hq5xuxdrg3xcn3wz747bg4tq

Free viewpoint video synthesis and presentation of sporting events for mixed reality entertainment

Naho Inamoto, Hideo Saito
2004 Proceedings of the 2004 ACM SIGCHI International Conference on Advances in computer entertainment technology - ACE '04  
The proposed method does not need to calibrate multiple video cameras for capturing the event and the HMD camera.  ...  In accordance with the viewpoint position of an observer, virtual view image of sporting scene is generated by view interpolation among multiple videos captured at real stadium.  ...  OVERVIEW Firstly, a soccer match is taken by uncalibrated multiple cameras at stadium and stored as video images.  ... 
doi:10.1145/1067343.1067348 dblp:conf/ACMace/InamotoS04 fatcat:6lijhk3bp5ejhhwspafrfjhooq

Image-based augmentation of virtual object for handy camera video sequence using arbitrary multiple planes

Y. Uematsu, H. Saito
2005 IEEE International Conference on Image Processing 2005  
In our approach, we require neither artificial markers nor sensors, and estimate the camera rotation and translation by an uncalibrated image sequence in which arbitrary multiple planes in the real world  ...  Since the geometrical relationship of those planes is unknown, for merging of them, we assign a 3D coordinate system for each plane independently and construct projective 3D space defined by projective  ...  Fig.1 describes an overview of the proposed method. The input image sequence is taken with an uncalibrated handy video camera.  ... 
doi:10.1109/icip.2005.1529926 dblp:conf/icip/UematsuS05 fatcat:3opdqpeb7bghhcdycgudnutcy4

Author Index

2010 2010 IEEE Computer Society Conference on Computer Vision and Pattern Recognition  
Estimating Optical Properties of Layered Surfaces Using the Spider Model Tan, Tieniu Visual Tracking via Incremental Self-tuning Particle Filtering on the Affine Group Tan, Wei-Chian Estimating Camera  ...  for Topology Classification of Local 3D Structures Okutomi, Masatoshi Image Restoration and Disparity Estimation from an Uncalibrated Multi-Layered Image Direct Image Alignment of Projector-Camera  ... 
doi:10.1109/cvpr.2010.5539913 fatcat:y6m5knstrzfyfin6jzusc42p54

Modelling of 3D Objects Using Unconstrained and Uncalibrated Images Taken with a Handheld Camera [chapter]

Minh Hoang Nguyen, Burkhard Wünsche, Patrice Delmas, Christof Lutteroth
2013 Communications in Computer and Information Science  
The results show that our algorithm is stable and enables inexperienced users to easily create complex 3D content using a simple consumer level camera.  ...  The user only has to create a set of images from different view directions, input them into our algorithm, and a 3D model is returned.  ...  Future Work We propose to use sketch input and symmetry information to "complete" regions not properly reconstructed in the 3D model due to lack of coverage on the input images.  ... 
doi:10.1007/978-3-642-32350-8_6 fatcat:hvffd3e2irdm5m4gxknpwu75xq

Photogeometric structured light: A self-calibrating and multi-viewpoint framework for accurate 3D modeling

Daniel G. Aliaga, Yi Xu
2008 2008 IEEE Conference on Computer Vision and Pattern Recognition  
Structured-light methods actively generate geometric correspondence data between projectors and cameras in order to facilitate robust 3D reconstruction.  ...  Photometric processing serves the double purpose of increasing the amount of recovered surface detail and of enabling the structured-light setup to be robustly self-calibrated.  ...  Acknowledgements We thank reviewers for their commentary and the funding of NSF CCF 0434398 and a Microsoft Gift.  ... 
doi:10.1109/cvpr.2008.4587709 dblp:conf/cvpr/AliagaX08 fatcat:4l4vgdl5c5gmjeymhuv3ddaqnu
« Previous Showing results 1 — 15 out of 440 results