9,153 Hits in 6.0 sec

Fast and Flexible Temporal Point Processes with Triangular Maps [article]

Oleksandr Shchur, Nicholas Gao, Marin Biloš, Stephan Günnemann
2020 arXiv   pre-print
Temporal point process (TPP) models combined with recurrent neural networks provide a powerful framework for modeling continuous-time event data.  ...  While such models are flexible, they are inherently sequential and therefore cannot benefit from the parallelism of modern hardware.  ...  Acknowledgments This research was supported by the German Federal Ministry of Education and Research (BMBF), grant no. 01IS18036B, the Software Campus Project Deep-RENT and by the BMW AG.  ... 
arXiv:2006.12631v2 fatcat:aqer2wrqvbgwlhopdepjuorvny

Unsupervised recursive sequence processing

Marc Strickert, Barbara Hammer, Sebastian Blohm
2005 Neurocomputing  
Discrete and real-valued sequences can be processed efficiently with this method as demonstrated in three experiments.  ...  While the former integrates the currently presented item and recent map activations, the latter allows representation of temporally possibly exponentially growing sequence diversification.  ...  Type P (0) P (1) P (0|0) P (1|0) P (0|1) P ( Conclusion We have presented a self organizing map with neural back-reference to its recently active sites and flexible topological structure of the neuron  ... 
doi:10.1016/j.neucom.2004.01.190 fatcat:7tsd3sgcvfdktf4vihki7sm2iq

Cube2Video: Navigate Between Cubic Panoramas in Real-Time

Qiang Zhao, Liang Wan, Wei Feng, Jiawan Zhang, Tien-Tsin Wong
2013 IEEE transactions on multimedia  
Online virtual navigation systems enable users to hop from one panorama to another, which belong to a sparse point-to-point collection, resulting in a less pleasant viewing experience.  ...  The temporal smoothness of the synthesized video sequence is improved by means of a compensation transformation.  ...  ACKNOWLEDGMENT We would like to acknowledge Google, VIVA lab of University of Ottawa and SIAT for the panoramic data, and we also thank Chunxiao Zhang for helpful discussion and sharing experimental result  ... 
doi:10.1109/tmm.2013.2280249 fatcat:7hgqchpdrrg4bpzygmd56etftu

Geodesic Distances to Landmarks for Dense Correspondence on Ensembles of Complex Shapes [chapter]

Manasi Datar, Ilwoo Lyu, SunHyung Kim, Joshua Cates, Martin A. Styner, Ross Whitaker
2013 Lecture Notes in Computer Science  
A novel set of numerical techniques for fast computation of geodesic distances to point sets is used to extract these features.  ...  Establishing correspondence points across a set of biomedical shapes is an important technology for a variety of applications that rely on statistical analysis of individual subjects and populations.  ...  This project was supported by grants from NIH-NCRR/NIH-NIGMS Center for Integrative Biomedical Computing-5P41RR012553/8P41GM103545, Roadmap Grant U54 EB005149-01 (NA-MIC), P30 HD03110, R01MH091645 and  ... 
doi:10.1007/978-3-642-40763-5_3 fatcat:lg7mjrx6lfaexh7ktqdfhdbldq

A combined temporal tracking and stereo-correlation technique for accurate measurement of 3D displacements: application to sheet metal forming

D Garcia, J.J Orteu, L Penazzi
2002 Journal of Materials Processing Technology  
this paper, the application of the stereo correlation technique to measure accurately the 3D shape of a stamped sheet metal part or the surface strain field undergone by the part during the stamping process  ...  The methods are fast because only a small subset of the image pixels is used, but usually give few matches (sparse disparity maps). 2. Template matching.  ...  processing and shap ing technologies.  ... 
doi:10.1016/s0924-0136(02)00380-1 fatcat:io2gwv4xxbdvtbxfrjbbjs3flm

Real-time encoding of live reconstructed mesh sequences for 3D tele-immersion

Rufael Mekuria, Dimitrios Alexiadis, Petros Daras, Pablo Cesar
2013 2013 IEEE International Conference on Multimedia and Expo Workshops (ICMEW)  
In this paper we experiment with a real-time reconstruction system that outputs a sequence of triangular meshes.  ...  By exploiting the properties of the capture and reconstruction process, we provide an optimized encoding mechanism that enables real-time encoding.  ...  The 3D mesh representation has advantages as it offers flexibility in rendering (shading, rendering with stereo or multiple views), integration with virtual worlds (collision detection, navigation) and  ... 
doi:10.1109/icmew.2013.6618356 dblp:conf/icmcs/MekuriaADC13 fatcat:hhobrryjxndr3hrlod7bjmo4yy

Direct cortical mapping via solving partial differential equations on implicit surfaces

2007 Medical Image Analysis  
By computing the map directly, we can avoid conventional intermediate parameterizations and help simplify the cortical mapping process.  ...  We also quantitatively compare the metric preserving property of the direct mapping method with a parametric mapping method on a group of 30 subjects.  ...  We next find the initial map at vertices close to the landmark curves and use them as the starting point of the front propagation process over the triangular mesh M.  ... 
doi:10.1016/ pmid:17379568 pmcid:PMC2227953 fatcat:fo6yx25t75fghb6wzyq4pxc2au

Fast Dual-LiDAR Reconstruction for Dynamic Wind Field Retrieval

Yong Bao, Chao Tan, Jiabin Jia
2022 Atmosphere  
Results show that the temporal resolution of LiDAR wind retrieval can be improved by a factor of 2 to 8 and provide acceptable results with good spatial resolution.  ...  resolution to capture the fast changes of wind turbine wake fields.  ...  advantages of high flexibility in up-sampling factors and reduction in computational cost due to the fast LoS data matrix completion process.  ... 
doi:10.3390/atmos13060905 fatcat:x3yjqgsfjnbn3h3ggkuvnxwmam

Direct mapping of hippocampal surfaces with intrinsic shape context

Yonggang Shi, Paul M. Thompson, Greig I. de Zubicaray, Stephen E. Rose, Zhuowen Tu, Ivo Dinov, Arthur W. Toga
2007 NeuroImage  
We propose in this paper a new method for the mapping of hippocampal (HC) surfaces to establish correspondences between points on HC surfaces and enable localized HC shape analysis.  ...  We also demonstrate the flexibility of the direct mapping method by applying it to construct spherical maps of HC surfaces.  ...  To compute the geodesic distance transform of a vertex p ∈ V, we use the fast marching algorithm on triangular meshes (Kimmel and Sethian, 1998) .  ... 
doi:10.1016/j.neuroimage.2007.05.016 pmid:17625918 pmcid:PMC2227952 fatcat:5czed4t4rrdstjnphfk5rspom4

3D shape measurement based on projection of triangular patterns of two selected frequencies

Pu Cao, Jiangtao Xi, Yanguang Yu, Qinghua Guo, Limei Song
2014 Optics Express  
with complex surface shape and high steps.  ...  with complex surface shape and high steps.  ...  Then, a triangular pattern with a lower frequency is projected, and the shift map can be retrieved by the single-step triangular-pattern spatial shift estimation algorithm [28] .  ... 
doi:10.1364/oe.22.029234 pmid:25402162 fatcat:bq7654e42fgrnmbun5h64r4c5u

Calibration of fringe projection profilometry: A comparative review

Shijie Feng, Chao Zuo, Liang Zhang, Tianyang Tao, Yan Hu, Wei Yin, Jiaming Qian, Qian Chen
2021 Optics and lasers in engineering  
Then, both quantitative and qualitative comparative experiments are implemented to show the advantages and constraints of each method.  ...  Many methods and studies on calibration have been presented in the last few years. However, a comparative overview on the accuracy and the implementation details is still lacking.  ...  We can calculate an absolute phase map ( , ) with the vertical fringe patterns by the -step phase-shifting algorithm and temporal phase unwrapping algorithms.  ... 
doi:10.1016/j.optlaseng.2021.106622 fatcat:6axjlz76nvagrdyk556bbmw3fa

Accelerated unsteady flow line integral convolution

Zhanping Liu, R.J. Moorhead
2005 IEEE Transactions on Visualization and Computer Graphics  
Unsteady flow line integral convolution (UFLIC) is a texture synthesis technique for visualizing unsteady flows with high temporal-spatial coherence.  ...  , therefore, the known pathlines can be reused for fast value scattering.  ...  Han-Wei Shen for his help with UFLIC questions, implementation details, and valuable suggestions. The unsteady vortex flow data set is courtesy of Dr. Ravi Samtany and Dr. Han-Wei Shen.  ... 
doi:10.1109/tvcg.2005.21 pmid:15747635 fatcat:t6nimsgldzanbo4pssrp3svdvy

Advances in functional and structural MR image analysis and implementation as FSL

Stephen M. Smith, Mark Jenkinson, Mark W. Woolrich, Christian F. Beckmann, Timothy E.J. Behrens, Heidi Johansen-Berg, Peter R. Bannister, Marilena De Luca, Ivana Drobnjak, David E. Flitney, Rami K. Niazy, James Saunders (+5 others)
2004 NeuroImage  
The techniques available for the interrogation and analysis of neuroimaging data have a large influence in determining the flexibility, sensitivity and scope of neuroimaging experiments.  ...  This research has focussed on the development of new methodologies for the analysis of both structural and functional magnetic resonance imaging data .  ...  We also acknowledge vital collaborations with the many individuals listed at References  ... 
doi:10.1016/j.neuroimage.2004.07.051 pmid:15501092 fatcat:5zxejlngyvhx3eb36pgrjuv4r4

RFNet-4D: Joint Object Reconstruction and Flow Estimation from 4D Point Clouds [article]

Tuan-Anh Vu, Duc Thanh Nguyen, Binh-Son Hua, Quang-Hieu Pham, Sai-Kit Yeung
2022 arXiv   pre-print
The key insight is that simultaneously performing both tasks via learning spatial and temporal features from a sequence of point clouds can leverage individual tasks, leading to improved overall performance  ...  Object reconstruction from 3D point clouds has achieved impressive progress in the computer vision and computer graphics research field.  ...  This allows fast computations in following operations as spatio-temporal data can be processed at any arbitrary frame.  ... 
arXiv:2203.16482v2 fatcat:3k4hspxebrfxfd3lbhmz76od44

Static and dynamic functional connectivity supports the configuration of brain networks associated with creative cognition

Abhishek Uday Patil, Sejal Ghate, Deepa Madathil, Ovid J. L. Tzeng, Hsu-Wen Huang, Chih-Mao Huang
2021 Scientific Reports  
We propose that the processing of creative cognition involves the static and dynamic re-configuration of brain networks associated with complex cognitive processes.  ...  Our results demonstrate the temporal connectivity of the dynamic large-scale creative networks between default mode network (DMN), salience network, and cerebellar network during creative cognition, and  ...  ) LN 45 − 51 26 2 R Inferior frontal (triangular) LN 45 54 28 1 L Superior temporal LN 22 − 57 − 47 15 R Superior temporal LN 22 59 − 42 13 R Vermis CN - 0 − 63 − 30 R  ... 
doi:10.1038/s41598-020-80293-2 pmid:33420212 fatcat:6dtyphvwjrbwdhagbc7b7x4eee
« Previous Showing results 1 — 15 out of 9,153 results