44 Hits in 4.0 sec

Image-Laser Fusion for In Situ 3D Modeling of Complex Environments: A 4D Panoramic-Driven Approach [chapter]

Daniela Craciun, Nicolas Paparoditis, Francis Schmitt
2012 Modeling and Simulation in Engineering  
The in-situ 3D modeling problem The in-situ 3D modeling problem is concerned with the automatic environment sensing through the use of active (laser) and/or passive (cameras) 3D vision and aims at generating  ...  Several research works introduced either 2D and 3D  ...  We developed a pair-wise scan matcher algorithm by matching 2D panoramic views, solving simultaneously the above interrelated problems using a pyramidal dense correlation framework via quaternions.  ... 
doi:10.5772/30269 fatcat:m25yasqni5fn7hfln5my4s2gbi

Image Alignment and Stitching: A Tutorial

Richard Szeliski
2006 Foundations and Trends in Computer Graphics and Vision  
They are ideally suited for applications such as video stabilization, summarization, and the creation of panoramic mosaics.  ...  used to produce seamless mosaics.  ...  This error can be distributed evenly across the whole sequence by taking the quotient of the two quaternions associated with these rotations and dividing this "error quaternion" by the number of images  ... 
doi:10.1561/0600000009 fatcat:b6t2liox4nacxfjopbtf2d6jhe

A vision-based approach for high accuracy assessment of satellite attitude

Alessandr Bevilacqua, Alessandro Gherardi, Ludovico Carozza
2009 2009 IEEE 12th International Conference on Computer Vision Workshops, ICCV Workshops  
Through these studies we have been able to characterize, and often overcome, the traps hidden at the development stage to propose the first vision based approach to determine with very a high accuracy  ...  In this work we present the achievements of the approach we have conceived to estimate in real time the attitude of a satellite endowed with an integral camera looking to the Earth.  ...  Melega and D. Modenini) for providing us with the data of their orbital/attitude simulator developed in the context of the STARS project.  ... 
doi:10.1109/iccvw.2009.5457628 dblp:conf/iccvw/BevilacquaGC09 fatcat:2ofparxxtveojp44nxs2uczc5q

Automated localisation of Mars rovers using co-registered HiRISE-CTX-HRSC orthorectified images and wide baseline Navcam orthorectified mosaics

Yu Tao, Jan-Peter Muller, William Poole
2016 Icarus (New York, N.Y. 1962)  
Finally, we demonstrate results of wide baseline stereo reconstruction with fixed mast position rover stereo imagery and its application to ground-to-orbit co-registration with HiRISE orthorectified image  ...  We present a wide range of research results in the area of orbit-to-orbit and orbit-to-ground data fusion, achieved within the EU-FP7 PRoVisG project and EU-FP7 PRoViDE project.  ...  An intra-stereo DTM construction and interpolation process is required because a general correlation matcher cannot deal with affine distortion.  ... 
doi:10.1016/j.icarus.2016.06.017 fatcat:sy22mhxyqvfrviypjtxbrmptxq

Disclinations, dislocations, and continuous defects: A reappraisal

M. Kleman, J. Friedel
2008 Reviews of Modern Physics  
The relaxation mechanisms associated with a disclination in its creation, motion, change of shape, involve an interplay with continuous or quantized dislocations and/or continuous disclinations.  ...  Disclinations, first observed in mesomorphic phases, are relevant to a number of ill-ordered condensed matter media, with continuous symmetries or frustrated order.  ...  Acknowledgments The authors thank Yves Bréchet, Jean-Luc Martin and Helena Van Swygenhoven for discussions on nanocrystals.  ... 
doi:10.1103/revmodphys.80.61 fatcat:ldu6dfcftfgyrksvhxsndblumy

Dragonfly: an implementation of the expand–maximize–compress algorithm for single-particle imaging

Kartik Ayyer, Ti-Yen Lan, Veit Elser, N. Duane Loh
2016 Journal of Applied Crystallography  
Single-particle imaging (SPI) with X-ray free-electron lasers has the potential to change fundamentally how biomacromolecules are imaged.  ...  The challenges posed by the resultant data stream are staggering: millions of incomplete, noisy and un-oriented patterns have to be computationally assembled into a three-dimensional intensity map and  ...  Acknowledgements The authors thank the referees for their careful reading of the manuscript and helpful suggestions.  ... 
doi:10.1107/s1600576716008165 pmid:27504078 pmcid:PMC4970497 fatcat:epzyqju5g5dgrf6sfx7d4ip3my

Acquiring and rendering high-resolution spherical mosaics

A. Kropp, N. Master, S. Teller
Proceedings IEEE Workshop on Omnidirectional Vision (Cat. No.PR00704)  
We describe an acquisition and viewing method for high-resolution, high-dynamic range spherical image mosaics.  ...  The improved rotation and internal parameter estimates are used in an interactive viewer for smooth inspection of the resulting large spherical mosaic.  ...  To refine rotation estimates within a node, an automatic spherical mosaicing algorithm is used, based on maximizing a dense inter-image correlation function [3] .  ... 
doi:10.1109/omnvis.2000.853803 fatcat:ox2kr7s5rbgydpukgi3ekxjkbe

Toward urban model acquisition from geo-located images

S. Teller
Proceedings Pacific Graphics '98. Sixth Pacific Conference on Computer Graphics and Applications (Cat. No.98EX208)  
The sensor is a geo-located camera, which annotates each acquired digital image with metadata recording the date and time of image acquisition, and estimating the position and orientation of the acquiring  ...  This metadata enables the formulation of reconstruction algorithms which scale well both with the number and spatial density of input images, and the complexity of the reconstructed model.  ...  All aspects of the system are fully automatic, save one: a semi-automated method for registering hemispherical images with respect to each other.  ... 
doi:10.1109/pccga.1998.731997 dblp:conf/pg/Teller98 fatcat:mxbjvohl5rfqhoqllis3a7kz4e

Hyperuniform states of matter

Salvatore Torquato
2018 Physics reports  
Hyperuniform states of matter are correlated systems that are characterized by an anomalous suppression of long-wavelength (i.e., large-length-scale) density fluctuations compared to those found in garden-variety  ...  , fluid dynamics, number theory, stochastic point processes, integral and stochastic geometry, the immune system, and photoreceptor cells.  ...  0.74 [157] ) and the least dense strictly jammed packings (conjectured to be the 'tunneled crystals' with φ min = 2φ max /3 ≈ 0.49 [158] ).  ... 
doi:10.1016/j.physrep.2018.03.001 fatcat:4ntnfxibc5hxdcbdzmm3skqh6e

The Use of Saliency in Underwater Computer Vision: A Review

Marco Reggiannini, Davide Moroni
2020 Remote Sensing  
Underwater survey and inspection are tasks of paramount relevance for a variety of applications.  ...  They are usually performed through the employment of optical and acoustic sensors installed aboard underwater vehicles, in order to capture details of the surrounding environment.  ...  and mosaicing.  ... 
doi:10.3390/rs13010022 fatcat:7i6r2jftdvdtzepcecm56pqqhi

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  
(We could also automate this process by correlating visual motion estimates with the hand-drawn map.)  ...  I 4 . 4 The algorithm matches pairs of 3D rays based on cross correlation.  ... 
doi:10.1109/mcg.2004.1297011 pmid:15628073 fatcat:a4v2bwkxfbd3ddyjdy3hdf3z5e

Catalogue of wide binary, trinary and quaternary candidates from the Gaia data release 2 (region | b| >25) [article]

Petr Zavada, Karel Píška
2021 arXiv   pre-print
The field of stars is divided into a mosaic of small pieces, which represent a statistical set for analysis.  ...  Specifically, data input is represented by a grid of circles (events) with radius 0.02 covering the sky in the field of galactic latitude | b| >25.  ...  In section 2.4 we show that distributions of the projection and correlations with proper motion allow us to obtain information about binary orbit.  ... 
arXiv:2104.04231v2 fatcat:obpok2thgbbxxkg33q5nafy4ea

3D Shape Registration [chapter]

Umberto Castellani, Adrien Bartoli
2012 3D Imaging, Analysis and Applications  
Three case studies are then described with an increasing level of difficulty. The first case study describes a simple but effective technique to detect outliers.  ...  Finally, open issues and directions for future work are discussed and conclusions are drawn.  ...  Compute the Jacobian matrix of LM-ICP by encoding rotation with quaternions. 12 5.  ... 
doi:10.1007/978-1-4471-4063-4_6 fatcat:xzu2upyznzgn5ob3q66wufifne

Parametric Dense Visual SLAM

Steven Lovegrove, Andrew Davison
We continue by developing different methods for dense tracking and constrained dense SLAM in different applications such as spherical mosaicing.  ...  Finally, we show how live dense tracking can be tightly integrated with dense reconstruction to create a 6 DOF monocular live dense SLAM system which outperforms the current state of the art in many respects  ...  Starting with intrinsicsFigure 5.11: Outdoor spherical mosaics. Figure 5 . 5 12: 360 • spherically-projected panoramas for three indoor sequences, taken with different lenses.  ... 
doi:10.25560/9618 fatcat:nuz4j4uqevddtevwjitrhm6sau

Towards a fourth spatial dimension of brain activity

Arturo Tozzi, James F. Peters
2016 Cognitive Neurodynamics  
CONTENT The fourth dimension of brain activity and novel correlated neurotechniques 1  ...  In particular, the Borsuk-Ulam Theorem (BUT) states that, if a single point projects to a higher spatial dimension, it gives rise to two antipodal points with matching description.  ...  A direct proof of this theorem is symmetric with the proof of the Borsuk-Ulam Theorem is given by , since we assume that S d is an inner sphere of S n symmetric about the center of S n and, from the Schleicher  ... 
doi:10.1007/s11571-016-9379-z pmid:27275375 pmcid:PMC4870410 fatcat:kgfvl25o6fcpfdiitcmvaumska
« Previous Showing results 1 — 15 out of 44 results