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Sublabel–Accurate Relaxation of Nonconvex Energies

Thomas Mollenhoff, Emanuel Laude, Michael Moeller, Jan Lellmann, Daniel Cremers
2016 2016 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)  
We propose a novel spatially continuous framework for convex relaxations based on functional lifting. Our method can be interpreted as a sublabel-accurate solution to multilabel problems.  ...  In comparison to recent MRF-based approaches, our method is formulated in a spatially continuous setting and shows less grid bias.  ...  We greatly acknowledge NVIDIA for providing us a Titan X GPU.  ... 
doi:10.1109/cvpr.2016.428 dblp:conf/cvpr/MollenhoffLMLC16 fatcat:utpnwleqsrdy3buaderb6z2rli

Phase unwrapping method based on parallel local minimum reliability dual expanding for large-scale data

Jian Gao, Zhongchang Sun
2019 Journal of Applied Remote Sensing  
Two big blocks of airborne InSAR data were processed by the proposed method, the experimental results and analysis verified its robustness and efficiency for the large-scale PU problem.  ...  A parallel PU method based on local minimum reliability dual expanding is proposed.  ...  on residue clustering characteristics, have recently been provided with a convex hull algorithm for more effective schemes.  ... 
doi:10.1117/1.jrs.13.038506 fatcat:4a7n66gxzngzbfx7aeo5aofwoy

Receiver phase alignment using fitted SVD derived sensitivities from routine prescans

Olivia W. Stanley, Ravi S. Menon, L. Martyn Klassen, Kendrick Kay
2021 PLoS ONE  
This pilot study proposes a fitted SVD method which utilizes existing combination methods to create a phase sensitive combination method targeted at large multi-volume datasets.  ...  Two additional applications of the method are also explored, using the fitted SVD method in an asymmetrical coil and in a case with subject motion.  ...  When applying the fit for phase alignment, voxels within the convex hull are aligned based on the fit and exterior points are aligned based on the fit at the closest point on the convex hull.  ... 
doi:10.1371/journal.pone.0256700 pmid:34460849 pmcid:PMC8404984 fatcat:2vo7dkebordgralpisgpyro2h4

Coping with low modulation in speckle interferometry: a novel approach based on the Delaunay triangulation

Sébastien Equis, Pierre Jacquot, Armando Albertazzi Goncalves, Jr., Guillermo H. Kaufmann
2010 Speckle 2010: Optical Metrology  
and highlight some definite advantages over classical filtering methods in terms of phase error reduction and algorithmic complexity.  ...  The method applies in both situations of static and dynamic regimes, and is designated respectively by "sine-cosine DT filter" and "3D piecewise processing" or 3DPP -3D denoting the temporal and the two  ...  the 2π phase difference between two static cases, obtained for instance with a phase-stepping algorithm.  ... 
doi:10.1117/12.868466 fatcat:pojnsmjy2zezfj5mboqdmhcpfq

Robust Multi-echo GRE Phase processing using a unity rank enforced complex exponential model [article]

Joseph Suresh Paul, Sreekanth Madhusoodhanan
2021 arXiv   pre-print
Purpose: Develop a processing scheme for Gradient Echo (GRE) phase to enable restoration of susceptibility-related (SuR) features in regions affected by imperfect phase unwrapping, background suppression  ...  Theory and Methods: The predictable components sampled across the echo dimension in a multi-echo GRE sequence are recovered by rank minimizing a Hankel matrix formed using the complex exponential of the  ...  ( MEDI) algorithm (48, 49),following Laplacian based fast unwrapping and background suppressionusing PDF.Decreasing the value of MEDI regularization parameter causes an increase in the number of streaking  ... 
arXiv:2106.15472v1 fatcat:tohs2u4xhna3xjdkkyxtcl64xq

Structure in the 3D Galaxy Distribution. III. Fourier Transforming the Universe: Phase and Power Spectra

Jeffrey D. Scargle, M. J. Way, P. R. Gazis
2017 Astrophysical Journal  
No significant signature of non-Gaussianity has been found in the relatively small data set analyzed, but we identify some threads of modern large scale inference methodology that will presumably yield  ...  The direct unbinned transform yields a complex 3D data cube quite similar to that from the Fast Fourier Transform (FFT) of finely binned galaxy positions.  ...  A way to address the exponentially large size of such a collection is to use the Bayesian Block algorithm (Jackson et al. 2005; Scargle et al. 2013 ) in its higher dimensional mode (Jackson et al. 2010  ... 
doi:10.3847/1538-4357/aa692d pmid:29628519 pmcid:PMC5882497 fatcat:ea6tumy7ufd2vb3lmtgfih6mwq

A state-of-the-art review of automated extraction of rock mass discontinuity characteristics using three-dimensional surface models

Rushikesh Battulwar, Masoud Zare-Naghadehi, Ebrahim Emami, Javad Sattarvand
2021 Journal of Rock Mechanics and Geotechnical Engineering  
Normal tensor voting with trace growth algorithm is a robust method for measuring joint trace length from 3D meshes.  ...  In the last two decades, significant research has been conducted in the field of automated extraction of rock mass discontinuity characteristics from three-dimensional (3D) models.  ...  A polygon bounding the planar points for each discontinuity can be determined by applying convex hull algorithms (Preparata and Hong, 1977) .  ... 
doi:10.1016/j.jrmge.2021.01.008 fatcat:jo6mkqi22fbrhhlvf2ugj2vdqu

Lower body kinematics evaluation based on a multidirectional four-dimensional structured light measurement

Janusz Lenar, Marcin Witkowski, Vincenzo Carbone, Sjoerd Kolk, Marcin Adamczyk, Robert Sitnik, Marjolein van der Krogt, Nico Verdonschot
2013 Journal of Biomedical Optics  
A set of musculoskeletal models was built for three subjects based on the trajectories of real and virtual markers.  ...  The VICON system relies on the application of reflective markers on a person's body and tracking their positions in three-dimensional space using multiple cameras [optical motion capture (OMC)].  ...  Fig. 1 1 Phase modulation evaluation: (a) input fringe image, (b) wrapped phase (7-point SCPS), (c) quality map for spanning tree phase unwrapping algorithm, and (d) unwrapped phase distribution.  ... 
doi:10.1117/1.jbo.18.5.056014 pmid:23722453 fatcat:jzvjyulpbvhdjgtv7tghlwlsae

Detecting Ground Deformation in the Built Environment Using Sparse Satellite InSAR Data With a Convolutional Neural Network

Nantheera Anantrasirichai, Juliet Biggs, Krisztina Kelevitz, Zahra Sadeghi, Tim Wright, James Thompson, Alin Marian Achim, David Bull
2020 IEEE Transactions on Geoscience and Remote Sensing  
We propose three enhancement methods to tackle these problems: i) spatial interpolation with modified matrix completion, ii) a synthetic training dataset based on the characteristics of the real UK velocity  ...  The large volumes of Sentinel-1 data produced over Europe are being used to develop pan-national ground motion services.  ...  Our three-dimensional (3D) synthetic deformation and its projection to create two-dimensional (2D) unwrapped velocity map are shown in (b) and (c), respectively.  ... 
doi:10.1109/tgrs.2020.3018315 fatcat:bvxvz4h6u5gs3i2ruxuqg35kiy

Retrieval of agricultural crop height from space: A comparison of SAR techniques

Esra Erten, Juan M. Lopez-Sanchez, Onur Yuzugullu, Irena Hajnsek
2016 Remote Sensing of Environment  
Coherent and incoherent crop height estimation methods are 10 discussed for the first time with a unique TanDEM-X dataset acquired over rice cultivation areas.  ...  successful method of future precision farming studies. 35  ...  Then, to help phase unwrapping for the acquisitions with a small height of ambiguity, 280 the topographic phase has been removed before the unwrapping stage.  ... 
doi:10.1016/j.rse.2016.10.007 fatcat:vqnbidj2sbejhlhy3szvswu2sy

High-Precision 3D Reconstruction for Small-to-Medium-Sized Objects Utilizing Line-Structured Light Scanning: A Review

Bin Cui, Wei Tao, Hui Zhao
2021 Remote Sensing  
The focus is placed on exploring studies reconstructing small-to-medium-sized objects, as opposed to performing large-scale reconstructions in the field.  ...  Meanwhile, a review of approaches, algorithms, and techniques for high-precision 3D reconstruction utilizing line-structured light scanning, which is analyzed from a deeper perspective of elementary details  ...  phase unwrapping problem in the shaded region or sudden phase variation, such as steps, deep grooves, and protrusions, leading to the failure of reconstruction of complex three-dimensional objects with  ... 
doi:10.3390/rs13214457 fatcat:6pnpg7rxcnaufcrbey2m335lnq

Burgers turbulence

J BEC, K KHANIN
2007 Physics reports  
The last decades witnessed a renewal of interest in the Burgers equation.  ...  Much activities focused on extensions of the original one-dimensional pressureless model introduced in the thirties by the Dutch scientist J.M.  ...  Acknowledgements 46 Acknowledgements Over the years of our work on Burgers turbulence, we profited a lot from numerous discussions with Uriel Frisch whose influence on our work is warmly acknowledged.  ... 
doi:10.1016/j.physrep.2007.04.002 fatcat:ftfantwfpfasbk7xh6yd3vecki

2021 Index IEEE Transactions on Power Systems Vol. 36

2021 IEEE Transactions on Power Systems  
., +, TPWRS Jan. 2021 58-67 Convex Primal Formulations for Convex Hull Pricing With Reserve Commitments.  ...  Ahmadi, N., +, TPWRS May 2021 1922-1933 Greedy algorithms Estimating Number of Critical Eigenvalues of Large-Scale Power System Based on Contour Integral.  ... 
doi:10.1109/tpwrs.2021.3125235 fatcat:n3ecyy2flnapzjz7clyrp7sx4a

Characterization and Measurement of Microcomponents with the Atomic Force Microscope (AFM) [chapter]

2018 Optical Inspection of Microsystems  
A wide variety of references are listed.  ...  FIGURE 1 . 1 40 Position and orientation recognition using the convex hull method. FIGURE 1 . 1 41 Best fit using the (a) Gauss and (b) Chebyshev methods.  ...  Convex hull length The length of the convex hull. Area The area covered by an object including or excluding the area of any holes contained within.  ... 
doi:10.1201/9781420019162-8 fatcat:lbc7cnnaxzf7pk7q24mgfcvl5q

Behavior of the Regularized Sampling Inverse Scattering Method at Internal Resonance Frequencies

N. Shelton, K. F. Warnick
2002 Electromagnetic Waves  
, Fourier transformation, phase unwrapping, image segmentation, meshing, denoising, numerical solutions of partial differential equations and various other computations.  ...  Waves The inverse problem considered in this paper is to determine the shape of a two-dimensional time-harmonic acoustic scatterer with Dirichlet boundary conditions from the knowledge of some far field  ...  We will use methods based on special solutions and will address two types of them, i.e. the Green's type solutions and the complex geometrical optics type solutions.  ... 
doi:10.2528/pier02092502 fatcat:d2xx2q47qngnzewhh6lgs66iru
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