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3D Orientation Field Transform [article]

Wai-Tsun Yeung, Xiaohao Cai, Zizhen Liang, Byung-Ho Kang
2020 arXiv   pre-print
In principle, the proposed 3D orientation field transform can naturally tackle any dimensions.  ...  As a special case, it is also ideal for 2D images, owning simpler methodology compared to the previous 2D orientation field transform.  ...  We proposed the 3D orientation field transform below.  ... 
arXiv:2010.01453v1 fatcat:nl3yjhllmvaypohmlllr2qprji

A tool for intraoperative visualization of registration results

Franklin King, Andras Lasso, Csaba Pinter, Gabor Fichtinger, Ziv R. Yaniv, David R. Holmes
2014 Medical Imaging 2014: Image-Guided Procedures, Robotic Interventions, and Modeling  
Glyph visualization mode uses oriented and scaled glyphs, such as arrows, to represent the deformation field in 3D whereas glyph slice visualization mode creates arrows that can be seen as a 2D vector  ...  field.  ...  A typical method of visualizing both 2D and 3D vector fields is the usage of oriented and scaled glyphs such as arrows [1] .  ... 
doi:10.1117/12.2043496 dblp:conf/miigp/KingLPF14 fatcat:q67ozeel6bcilb6sde4d5ojce4

Creation of Three-dimensional Crop Maps based on Aerial Stereoimages

F. Rovira-Más, Q. Zhang, J.F. Reid
2005 Biosystems Engineering  
In this 3D crop map generation method, individual images were fused in a global map by transforming image space coordinates into global East-North coordinates.  ...  This research investigated the use of a compact stereocamera mounted on a remotecontrolled helicopter to acquire stereoimages of a maize field and represent the crop information in a 3D crop map.  ...  Appreciation is especially extended to Professor Noboru Noguchi for his support in performing field tests at Hokkaido University.  ... 
doi:10.1016/j.biosystemseng.2004.11.013 fatcat:smsfidphrrccfoo6obctbghoe4

2.5D controlled-source EM modeling with general 3D source geometries

Rita Streich, Michael Becken, Oliver Ritter
2011 Geophysics  
Accordingly, only positive wavenumbers need to be considered, and inverse transform of each field component to the space domain is accomplished by applying either a fast cosine or sine transform filter  ...  We present a novel 2.5D CSEM modeling scheme that overcomes this limitation and permits efficient simulations of sources with general shape and orientation by evaluating fields for the entire source at  ...  Figure 2a), (b) the k x transformẼ P x of the field shown in (a), (c) the k x -domain secondary fieldẼ S x at the same y location, but at the surface, and (d) the x-domain transform E S x of the field  ... 
doi:10.1190/geo2011-0111.1 fatcat:xbys6rf75fcrpen5znbdn2euxm

Register cardiac fiber orientations from 3D DTI volume to 2D ultrasound image of rat hearts

Xulei Qin, Silun Wang, Ming Shen, Xiaodong Zhang, Stamatios Lerakis, Mary B. Wagner, Baowei Fei, Robert J. Webster, Ziv R. Yaniv
2015 Medical Imaging 2015: Image-Guided Procedures, Robotic Interventions, and Modeling  
It utilizes a 2D/3D intensity based registration procedure including rigid, log-demons, and affine transformations to search the best similar slice from the template volume.  ...  In order to supply more detailed microstructure information of the myocardium, this paper proposes a registration method to map cardiac fiber orientations from three-dimensional (3D) magnetic resonance  ...  The corresponding transformation fields are set as: T 1 for rigid registration and T 2 for log-demons registration.  ... 
doi:10.1117/12.2082317 pmid:26855466 pmcid:PMC4737950 dblp:conf/miigp/QinWSZLWF15 fatcat:arte2jsfxjehdeoj6ortmcmwg4

3Din vivoimaging of rat hearts by high frequency ultrasound and its application in myofiber orientation wrapping

Xulei Qin, Silun Wang, Ming Shen, Xiaodong Zhang, Stamatios Lerakis, Mary B. Wagner, Baowei Fei, Johan G. Bosch, Neb Duric
2015 Medical Imaging 2015: Ultrasonic Imaging and Tomography  
This 3D ultrasound imaging and fiber orientation estimation technique have potential applications in cardiac imaging.  ...  Especially, the wrapping of cardiac fiber orientations to the ultrasound volume could supply useful information on the stress distributions and electric action spreading.  ...  Thus, Vercauteren et al. adapted the Demons as an optimization procedure on the entire space of displacement fields to a space of diffeomorphic transformations through the exponential.  ... 
doi:10.1117/12.2082326 pmid:26412926 pmcid:PMC4581442 fatcat:mzgdjbjd6rb4fd74kfbekz3fae

Segmentation of thin structures in electron micrographs using orientation fields

Kristian Sandberg, Moorea Brega
2007 Journal of Structural Biology  
We introduce two new transforms, the Line Filter Transform (LFT) and the Orientation Filter Transform (OFT).  ...  The OFT utilizes geometrical information about the structure by measuring correlations of local orientations in the image.  ...  orientation field before applying the Orientation Field Transform.  ... 
doi:10.1016/j.jsb.2006.09.007 pmid:17116405 fatcat:ntrx4d7gwjc6blzg45sdrcl4fa

Computations underlying the visuomotor transformation for smooth pursuit eye movements

T. Scott Murdison, Guillaume Leclercq, Philippe Lefèvre, Gunnar Blohm
2015 Journal of Neurophysiology  
signals with three-dimensional (3D) eye and head orientation and velocity signals to generate a spatially correct 3D pursuit command.  ...  Our model is the first to describe the general 3D transformation for smooth pursuit mediated by eye-and head-dependent gain modulation.  ...  These models could not perform the general, 3D transformation that our model performs here, which accounts for 2D retinal signals, 3D eye orientation and velocity, and 3D head orientation and velocity,  ... 
doi:10.1152/jn.00273.2014 pmid:25475344 pmcid:PMC4346721 fatcat:sno53diwlva43baf7vvj4rmxdy

Linear object classes and image synthesis from a single example image

T. Vetter, T. Poggio
1997 IEEE Transactions on Pattern Analysis and Machine Intelligence  
The need to generate new views of a 3D object from a single real image arises in several fields, including graphics and object recognition.  ...  For linear object classes, it is shown that linear transformations can be learned exactly from a basis set of 2D prototypical views.  ...  Linear object classes have the properties that new orthographic views of any object of the class under uniform affine 3D transformations, and, in particular, rigid transformations in 3D, can be generated  ... 
doi:10.1109/34.598230 fatcat:njkobc434fferoarplubnzxv5m

Automated 3D registration of magnetic resonance angiography, 3D power doppler, and 3D B-mode ultrasound images of carotid bifurcation

Piotr J. Slomka, Jonathan Mandel, Aaron Fenster, Donal B. Downey, Kenneth M. Hanson
2000 Medical Imaging 2000: Image Processing  
The Bmode images, acquired simultaneously in the same orientation as PD, are registered to the MRA using the transformation obtained from the MRA-PD registration.  ...  To allow a more objective interpretation of 3D carotid bifurcation images, we have implemented and evaluated on patient data, automated volume registration of 3D magnetic resonance angiography (MRA), 3D  ...  The 3D B-mode ultrasound images, acquired simultaneously and in the same orientation as PD images, were then transformed and superimposed on the MRA images using the transformation parameters obtained  ... 
doi:10.1117/12.387695 dblp:conf/miip/SlomkaMFD00 fatcat:foeywyrgwvclfeo26lpi45hkea

Additive Manufacturing and Performance of E-Type Transformer Core

Hans Tiismus, Ants Kallaste, Anouar Belahcen, Anton Rassolkin, Toomas Vaimann, Payam Shams Ghahfarokhi
2021 Energies  
transformer are identified at operating temperature.  ...  Further optimization of both the 3D printed material and core design are proposed for obtaining higher electrical performance for AC applications.  ...  Acknowledgments: The authors would like to thank Balti Transformers Ltd. for cooperation. Conflicts of Interest: The authors declare no conflict of interests.  ... 
doi:10.3390/en14113278 fatcat:wekh26nyhrfozoulweenwwtdum

Simulating the Cortical 3D Visuomotor Transformation of Reach Depth

Gunnar Blohm, Markus Lappe
2012 PLoS ONE  
To bridge the gap between behavior and neurophysiology, we trained a feed-forward artificial neural network to uncover potential mechanisms that might underlie the 3D transformation of reach depth.  ...  Our physiologically-inspired 4-layer network receives distributed 3D visual inputs (1 st layer) along with eye, head and vergence signals.  ...  The 3D angular vectors for eye and head orientation were then transformed into two 6D arrays of inputs (one for eye and one for head orientation) as follows [13, 76, 85] : a +,i~0 :5+ r i 2 : r 0 ð5Þ  ... 
doi:10.1371/journal.pone.0041241 pmid:22815979 pmcid:PMC3397995 fatcat:taub6mznpndzrphjhgeiwecymq

Fast 3D target-oriented reverse-time datuming

Shuqian Dong, Yi Luo, Xiang Xiao, Sergio Chávez-Pérez, Gerard T. Schuster
2009 Geophysics  
Target-oriented RTD is tested on 2D and 3D SEG/EAGE synthetic data sets and a 3D field data set from the Gulf of Mexico.  ...  To overcome this problem, a 3D target-oriented reverse-time datuming ͑RTD͒ method is presented, which can generate redatumed data economically in target areas beneath complex structures such as salt domes  ...  transforms. 3D target-oriented RTD WCA149 tum line.  ... 
doi:10.1190/1.3261746 fatcat:4jqcch3zfbb6lmjyqkkni7sxni

DTI template-based estimation of cardiac fiber orientations from 3D ultrasound

Xulei Qin, Baowei Fei
2015 Medical Physics (Lancaster)  
It estimated the cardiac fiber orientations of the target heart by deforming the fiber orientations of the template heart, based on the deformation field of the registration between the ultrasound geometry  ...  Methods: A DTI template based framework was developed to estimate cardiac fiber orientations from 3D ultrasound images using an animal model.  ...  Thus, Vercauteren et al. adapted the Demons as an optimization procedure on the entire space of displacement fields to a space of diffeomorphic transformations through the exponential.  ... 
doi:10.1118/1.4921121 pmid:26127045 pmcid:PMC4441706 fatcat:73xleuuv4vhxtim2beqxwuz6ky

Parametric Curves [chapter]

2005 Geometric Programming for Computer-Aided Design  
335 9.1.3 Window-viewport mapping 336 9.2 3D pipeline 339 9.2.1 View model 340 9.2.2 Coordinate systems 341 9.2.3 Transformations of coordinates 342 9.2.4 View orientation 344 9.2.5 View  ...  233 6.2.7 Tensor properties 234 6.2.8 Fixed point transformations 236 6.3 3D Transformations 237 6.3.1 Elementary transformations 237 6.3.2 Rotations 240 6.3.3 Rotations about affine axes  ... 
doi:10.1002/0470013885.ch11 fatcat:vp5ndtn5offmvl6nnsf2hfk644
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