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Feature-Based Multi-video Synchronization with Subframe Accuracy [chapter]

A. Elhayek, C. Stoll, K. I. Kim, H. -P. Seidel, C. Theobalt
2012 Lecture Notes in Computer Science  
For multi-video synchronization, the algorithm identifies an informative subset of video pairs which prevents the RANSAC algorithm from being biased by outliers.  ...  Our algorithm relies on general image features and it does not require explicitly tracking any specific object, making it applicable to general scenes with complex motion.  ...  Two-video synchronization Our algorithm is based on matching trajectories of features appearing in a pair of videos.  ... 
doi:10.1007/978-3-642-32717-9_27 fatcat:5pev2tyoerh5jesnf5cprr2hum

Accurate Video Alignment Using Phase Correlation

Congxia Dai, Yunfei Zheng, Xin Li
2006 IEEE Signal Processing Letters  
The accuracy of our technique is demonstrated by experimental results using real-world sequences. Index Terms-Multiview video, phase correlation, subframe accuracy, temporal alignment.  ...  accuracy.  ...  Subframe Ground-Truth via Supplementary Audio In view of difficulty with evaluating the accuracy of subframe video alignment, we come up with a novel approach based on the observation that supplementary  ... 
doi:10.1109/lsp.2006.879852 fatcat:n6j6zj72wjeflkj5cxe7xof4se

Efficient Subframe Video Alignment Using Short Descriptors

G. D. Evangelidis, C. Bauckhage
2013 IEEE Transactions on Pattern Analysis and Machine Intelligence  
In addition, we extend the recently introduced ECC image-alignment algorithm to the temporal dimension that allows for spatial registration and synchronization refinement with subframe accuracy.  ...  Experiments with real videos by moving or static cameras demonstrate the efficiency of the proposed method and verify its effectiveness with respect to spatio-temporal alignment accuracy.  ...  with subframe accuracy.  ... 
doi:10.1109/tpami.2013.56 pmid:23969383 fatcat:n36uzzpqrne5vff5lwggdkjmya

Synchronization and rolling shutter compensation for consumer video camera arrays

Derek Bradley, Bradley Atcheson, Ivo Ihrke, Wolfgang Heidrich
2009 2009 IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops  
The first approach is based on strobe illumination, while the second employs a subframe warp along optical flow vectors.  ...  the video volume.  ...  Most synchronization algorithms are based on some form of feature tracking [6] .  ... 
doi:10.1109/cvprw.2009.5204340 dblp:conf/cvpr/BradleyAIH09 fatcat:2lziyfk3j5dfpjzoh25uj5s67m

Synchronization and rolling shutter compensation for consumer video camera arrays

D. Bradley, B. Atcheson, I. Ihrke, W. Heidrich
2009 2009 IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops  
The first approach is based on strobe illumination, while the second employs a subframe warp along optical flow vectors.  ...  the video volume.  ...  Most synchronization algorithms are based on some form of feature tracking [6] .  ... 
doi:10.1109/cvpr.2009.5204340 fatcat:7wk7jlahnjdyfbfctwlrtsuljq

Subframe Temporal Alignment of Non-Stationary Cameras

B. Meyer, T. Stich, M. Pollefeys
2008 Procedings of the British Machine Vision Conference 2008  
Based on motion trajectory correspondences, the estimation is done in two steps.  ...  We verify the robustness and performance of our approach on synthetic data as well as on real video sequences.  ...  Main application of the method is multi-view video acquisition.  ... 
doi:10.5244/c.22.11 dblp:conf/bmvc/MeyerSMP08 fatcat:bhrg3ltcjjhqjhxj3lcdgwljb4

A toolchain for capturing and rendering stereo and multi-view datasets

Felix Klose, Christian Lipski, Kai Ruhl, Benjamin Meyer, Marcus Magnor
2011 2011 International Conference on 3D Imaging (IC3D)  
From input data we can either generate new viewpoints employing the Virtual Video Camera a purely image based system or generate 3D scene models.  ...  Index Terms-Stereoscopic 3D, Multi-View Stereo, Unsynchronized Cameras.  ...  Preferably, the alignment is performed with subframe accuracy.  ... 
doi:10.1109/ic3d.2011.6584392 dblp:conf/ic3d/KloseLRMM11 fatcat:rp4ceut3nbdpjjrrlocm4o7kki

Optimizing Detection Rate and Characterization of Subtle Paroxysmal Neonatal Abnormal Facial Movements with Multi-Camera Video-Electroencephalogram Recordings

Francesco Pisani, Elena Pavlidis, Luca Cattani, Gianluigi Ferrari, Riccardo Raheli, Carlotta Spagnoli
2016 Neuropediatrics  
Conflict of Interests The authors declare no potential conflict of interest with respect to the research, authorship, and/or publication of this article.  ...  Therefore, the synchronized video recordings in output from the mixer have a global resolution of 720 Â 576 pixels, divided into four subframes (one for each supported camera) with a resolution of 360  ...  seizures diagnosis. 1 What is generally referred to is a video recording with one single camera synchronized to EEG.  ... 
doi:10.1055/s-0036-1582245 pmid:27111027 fatcat:6p5rq6a4jfhirknc45fiuazbey

Spatio-temporal motion tracking with unsynchronized cameras

A. Elhayek, C. Stoll, N. Hasler, K. I. Kim, H. Seidel, C. Theobalt
2012 2012 IEEE Conference on Computer Vision and Pattern Recognition  
We reconstruct the pose and motion of a character from a multi-view video sequence without requiring the cameras to be synchronized and without aligning captured frames in time.  ...  By formulating the model-to-image similarity measure as a temporally continuous functional, we are also able to reconstruct motion in much higher temporal detail than was possible with previous synchronized  ...  Multi-view calibration is performed using a structure-from-motion approach, and subframe accurate synchronization is achieved by optimizing correlation of the audio channels of each video.  ... 
doi:10.1109/cvpr.2012.6247886 dblp:conf/cvpr/ElhayekSHKST12 fatcat:3cpuyejl5fagbdgiuebprnwyxm

Optimization of Symmetric Transfer Error for Sub-frame Video Synchronization [chapter]

Meghna Singh, Irene Cheng, Mrinal Mandal, Anup Basu
2008 Lecture Notes in Computer Science  
Unlike existing methods that synchronize videos of similar events (i.e., videos related to each other through the motion in the scene) up to an integer alignment, we establish sub-frame video synchronization  ...  To this end, we propose a novel symmetric transfer error which is dynamically minimized, and reduces the propagation of error from feature extraction and spatial mapping into temporal synchronization.  ...  Comparative analysis with a rank-constraint based method demonstrated a marked improvement in video synchronization with our method.  ... 
doi:10.1007/978-3-540-88688-4_41 fatcat:gm2a5nht3fexjha4x3kqaafhky

Towards 5G Enabled Tactile Robotic Telesurgery [article]

Qi Zhang, Jianhui Liu, Guodong Zhao
2018 arXiv   pre-print
However, the performance of robotic telesurgery largely depends on the network performance in terms of latency, jitter and packet loss, especially when telesurgical system is equipped with haptic feedback  ...  Based on this, a viable network architecture enabled by the converged edge and core cloud is presented and the relevant research challenges, open issues and enabling technologies in the 5G communication  ...  in working with robotic surgery.  ... 
arXiv:1803.03586v1 fatcat:sohmkhvkhzahvef6qofer6oq3i

Adaptive Subframe Allocation for Next Generation Multimedia Delivery Over Hybrid LTE Unicast Broadcast

Louis Christodoulou, Omar Abdul-Hameed, Ahmet M. Kondoz, Janko Calic
2016 IEEE transactions on broadcasting  
This paper presents a novel Hybrid Unicast Broadcast Synchronisation (HUBS) framework to synchronously deliver multi-stream content.  ...  Interactive viewing experiences including 3D or Free-Viewpoint Video (FVV) require the synchronous delivery of multiple video streams.  ... 
doi:10.1109/tbc.2016.2570020 fatcat:rw5k7qlldzbwnfvwr3lraynl5y

Design and Implementation of WiMAX Baseband System [chapter]

Zhuo Sun, Xu Zhu, Rui Chen, Zhuoyi Chen, Mingli Peng
2012 Advanced Transmission Techniques in WiMAX  
In this current scenario, having a flexible and reprogrammable product is necessary to provide a standards-agnostic or multi-protocol base station.  ...  In addition, new network architecture is designed with the goal to support packet-switched traffic with seamless mobility, quality of service and minimal latency.  ...  Firstly, functional code is created carefully based on the MATLAB simulation platform for each block. Then verify the code's syntax accuracy and logical accuracy with picoTools.  ... 
doi:10.5772/28805 fatcat:hqvhvy5rjvfsteuiwg7ihk6zwy

Efficient video sequences alignment using unbiased bidirectional dynamic time warping

Cheng Lu, Meghna Singh, Irene Cheng, Anup Basu, Mrinal Mandal
2011 Journal of Visual Communication and Image Representation  
We also establish sub-frame accuracy video alignment. The advantages of our approach are validated by tests conducted on several pairs of real and synthetic sequences.  ...  In this paper, we propose an efficient technique to synchronize video sequences of events that are acquired via uncalibrated cameras at unknown and dynamically varying temporal offsets.  ...  However, to align video sequences to subframe accuracy, we need to interpolate between the discrete representations.  ... 
doi:10.1016/j.jvcir.2011.06.003 fatcat:pmnyymwzbbafzl3327vo7ngmfm

Design and Implementation of a TDD-Based 128-Antenna Massive MIMO Prototyping System [article]

Xi Yang, Wen-Jun Lu, Ning Wang, Karl Nieman, Shi Jin, Hongbo Zhu, Xiaomin Mu, Ian Wong, Yongming Huang, Xiaohu You
2016 arXiv   pre-print
Based on the system hardware design demonstrated in this paper, both uplink real-time video and downlink data transmissions are realized, and the experiment results show that 268.8 Mbps rate was achieved  ...  The maximum spectral efficiency of the designed system will be 80.64 bit/s/Hz by twelve single-antenna users with 256-QAM modulation.  ...  University students Zijian Han and Feng Ji, Nanjing University of Posts and Telecommunications student Yu Yu, and Zhiya Information Technology engineers Xiaolong Miao and Wankai Tang for their assistance with  ... 
arXiv:1608.07362v1 fatcat:xg5d5h5otvbhvmnp756pofsjwi
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