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Simplex minimisation for multiple-reference motion estimation

M.E. Al-Mualla, N. Canagarajah, D.R. Bull
2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353)  
The proposed algorithms are extensions of the single-reference simplex minimisation search (SMS) algorithm.  ...  Guided by the results of this investigation, the paper proposes three fast multiple-reference block matching motion estimation algorithms.  ...  full-search while still maintaining the prediction gain of multiple-reference motion estimation.  ... 
doi:10.1109/iscas.2000.858856 dblp:conf/iscas/Al-MuallaCB00 fatcat:66nrxqesevhinjkx77x7u3uj2m

Multiresolution parametric estimation of transparent motions

V. Auvray, P. Bouthemy, J. Lienard
2005 IEEE International Conference on Image Processing 2005  
A new framework dealing with motion estimation in transparent images is presented. It relies on a block-oriented estimation involving an efficient multiresolution minimization.  ...  The estimated velocity vectors are greatly improved by an original postprocessing stage which performs a single motion estimation on differences of warped images.  ...  At its coarsest level L, motions are small enough to allow a minimisation using the conjugate gradient algorithm of the function J(u, v) linearized around (0, 0), which supplies first estimates of the  ... 
doi:10.1109/icip.2005.1529707 dblp:conf/icip/AuvrayBL05 fatcat:n33arpbvfjfwfelmooifdtyxvi

Lisa Pathfinder: Launch-Minus-7

Michele Armano
2015 Zenodo  
c Motion and elasticity !  ...  A time series for me! Units Values Errors Origin in time Sampling and duration • AOs carry their history • configuration control at all time • what PSD estimator did you use?  ... 
doi:10.5281/zenodo.34496 fatcat:dy2uix3ahveihmbuwj3km4z3nm

Hyperspectral Super-Resolution by Coupled Spectral Unmixing

Charis Lanaras, Emmanuel Baltsavias, Konrad Schindler
2015 2015 IEEE International Conference on Computer Vision (ICCV)  
The detailed spectral resolution is useful for many image analysis problems, but it comes at the cost of much lower spatial resolution.  ...  Yokoya's original code, and suggest to use them for future reference.  ...  because of the ensuing motion blur).  ... 
doi:10.1109/iccv.2015.409 dblp:conf/iccv/LanarasBS15 fatcat:utsbz7pp2bf4bkt32zas5tarsy

Direct information estimation from cryo-EM Movies with CARYON [article]

Kailash Ramlaul, Alister Burt, Natalia de Martin Garrido, James MacDonald, Colin Palmer, Arjen Jakobi, Christopher H S Aylett
2020 bioRxiv   pre-print
We show that, as well as correction for motion and radiation damage, the use of the information within movies allows substantially improved direct estimation of the remaining key image parameters required  ...  CARYON is intended to provide the best parameter estimation and filtration possible for a single complete, or large sub-section from a, movie micrograph without the use of a previously refined density.  ...  Acknowledgments The authors would like to thank Takanori Nakane, Paul Simpson, Suhail Islam, and Rafael Ayala for their time and efforts during the development of the CARYON conceptual approach.  ... 
doi:10.1101/2020.11.25.398891 fatcat:tc4ihyttvva3hboh4fp5hpl4ly

Automatic Calibration of a Six-Degrees-of-Freedom Pose Estimation System

Wouter Jansen, Dennis Laurijssen, Walter Daems, Jan Steckel
2019 IEEE Sensors Journal  
Systems for estimating the six-degrees-of-freedom human body pose have been improving for over two decades.  ...  Technologies such as motion capture cameras, advanced gaming peripherals and more recently both deep learning techniques and virtual reality systems have shown impressive results.  ...  The estimated pose which was calculated in the previous step is used as initial value L 0 for the minimisation here.  ... 
doi:10.1109/jsen.2019.2921644 fatcat:r437lld5frdy7jumprv2y4e6oe

A Bayesian approach to beam-induced motion correction in cryo-EM single-particle analysis [article]

Jasenko Zivanov, Takanori Nakane, Sjors Scheres
2018 bioRxiv   pre-print
We present a new method to estimate the trajectories of particle motion and the amount of cumulative beam damage in electron cryo-microscopy (cryo-EM) single particle analysis.  ...  Since our smoothness prior requires three parameters that describe the statistics of the observed motion, we also propose an efficient stochastic method to estimate those parameters.  ...  Acknowledgements We thank Jake Grimmett and Toby Darling for assistance with high-performance computing, and Christopher Russo and Richard Henderson for critical reading of the manuscript.  ... 
doi:10.1101/384537 fatcat:t3fkgqmgrbf2dou75ytj5eufbu

The PyZgoubi framework and the simulation of dynamic aperture in fixed-field alternating-gradient accelerators

S. Tygier, R.B. Appleby, J.M. Garland, K. Hock, H. Owen, D.J. Kelliher, S.L. Sheehy
2015 Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment  
Its object oriented design gives it the flexibility and extensibility required for current novel FFAG design.  ...  Acknowledgements We wish to thank François Méot for all his help with understanding the Zgoubi code. We would also like to thank Ken Peach for his help in checking the PAMELA results.  ...  Research supported by STFC Grant number ST/K002503/1 "Racetrack FFAGs for medical, PRISM and energy applications".  ... 
doi:10.1016/j.nima.2014.11.067 fatcat:suup4jpb5ng4fkei5va5voo5te

Tracking kidney stones in a homogeneous medium using a trilateration approach

Kya Shoar, Benjamin W. Turney, Robin O. Cleveland
2017 Journal of the Acoustical Society of America  
Using off-the-shelf hardware, the algorithm can calculate stone positions every 1 s allowing for real-time tracking during lithotripsy.  ...  Jonathan Kracht for the initial design of the circular array of transducers and Dr. Erasima Lyka and Dr. Christian Coviello for their help on working with the Verasonics.  ...  Error minimisation behaviour The error function given in Eq. (4) was minimised with the MATLAB function fminsearch, which uses the simplex search method. 23 Figures 4(A) and 4(B) show the error as a  ... 
doi:10.1121/1.5017718 pmid:29289106 pmcid:PMC5739911 fatcat:qs36cwxt6fcidnphm67dkls2si

Flight Controller and Low-Cost Test Environment for a Simulated Helicopter

Martin C. Terblanche, Kenneth R. Uren, George van Schoor
2014 IFAC Proceedings Volumes  
An observer estimates the unmeasured states such as blade flapping. The controller is developed in Simulink ® with a plug-in written for the AeroSIMRC flight simulator.  ...  The proposed methodology facilitates a low cost test environment for new flight control algorithms.  ...  ., 2001) , and the Prediction-Error Minimisation (PEM) for parameter estimation (Shim, 2000) .  ... 
doi:10.3182/20140824-6-za-1003.02194 fatcat:zgbgccryczfkni57drficzef74

Neural dynamics under active inference: plausibility and efficiency of information processing [article]

Lancelot Da Costa, Thomas Parr, Biswa Sengupta, Karl Friston
2021 arXiv   pre-print
It specifies neuronal dynamics for state-estimation in terms of a descent on (variational) free energy -- a measure of the fit between an internal (generative) model and sensory observations.  ...  Active inference is a normative framework for explaining behaviour under the free energy principle -- a theory of self-organisation originating in neuroscience.  ...  In the case of discrete state-estimation, beliefs evolve on the simplex towards the free energy minimum.  ... 
arXiv:2001.08028v2 fatcat:7bgv56tvo5ca5kwufe4kdxnsqq

Featureless 2D-3D Pose Estimation by Minimising an Illumination-Invariant Loss

Srimal Jayawardena and Marcus Hutter and Nathan Brewer
2010 arXiv   pre-print
For this purpose we derive a novel illumination-invariant distance measure between 2D photo and projected 3D model, which is then minimised to find the best pose parameters.  ...  Results for vehicle pose detection are presented.  ...  In general, pose estimation refers to the process of obtaining the location and orientation of an object.  ... 
arXiv:1011.1035v1 fatcat:lgtm27k5t5chvdj2tojuytgpci

Optimal and robust digital current controller synthesis for vector-controlled induction motor drive systems

L. Umanand, S.R. Bhat
1996 IEE Proceedings - Electric Power Applications  
A vectorcontrolled induction-motor-drive system is usually viewed as a full-state feedback problem, where the non-measurable states are estimated using suitable reduced-order observers.  ...  The current controllers are designed for the torque dynamics of the induction motor.  ...  For the SIMPLEX approach, those matrix elements which are zero can be set to zero, and the remaining matrix elements can be optimally obtained by minimisation of the performance index given by (21) 1 J  ... 
doi:10.1049/ip-epa:19960038 fatcat:ekn4qzr2xrdy5phongbb7qlyui

MRI-Based Skeletal Hand Movement Model [chapter]

Georg Stillfried, Ulrich Hillenbrand, Marcus Settles, Patrick van der Smagt
2014 Springer Tracts in Advanced Robotics  
The bones are segmented from the images, and their poses are estimated with respect to a reference posture.  ...  One of the models is published as an implementation for the free OpenSim simulation environment.  ...  ACKNOWLEDGEMENT The authors would like to thank Karolina Stonawska for the tedious work of segmenting the bones. This project was partly funded by the EU project The Hand Embodied (FP7-ICT-248587).  ... 
doi:10.1007/978-3-319-03017-3_3 fatcat:tzwx3m6ci5bkpjp6cqliwddhsm

Gaussian Process Latent Variable Alignment Learning [article]

Ieva Kazlauskaite, Carl Henrik Ek, Neill D. F. Campbell
2019 arXiv   pre-print
We derive a probabilistic model built on non-parametric priors that allows for flexible warps while at the same time providing means to specify interpretable constraints.  ...  approaches and provide examples to illustrate the versatility of our model in automatic inference of sequence groupings, absent from previous approaches, as well as easy specification of high level priors for  ...  Supplementary material Motion capture dataset In this experiment we use the full set of joint motions to align a set of sports actions (see §4 for further information on the motion capture dataset).  ... 
arXiv:1803.02603v3 fatcat:wr3dwwebrnbabdiokl2xveyc2y
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