Results 11 to 20 of about 94,845 (214)

Development of a stereovision-based technique to measure the spread patterns of granular fertilizer spreaders [PDF]

open access: yes, 2017
Centrifugal fertilizer spreaders are by far the most commonly used granular fertilizer spreader type in Europe. Their spread pattern however is error-prone, potentially leading to an undesired distribution of particles in the field and losses out of the ...
Cool, Simon   +6 more
core   +3 more sources

On ill-conditioning in 3D Similarity Transformation

open access: yesInternational Journal of Environment and Geoinformatics, 2015
3D similarity transformations are often used for datum transformation in Geomatic Engineering. The transformations are routinely performed between the point coordinates evaluated from GNSS (Global Navigation Satellite Systems) observations and the ...
Orhan Kurt
doaj   +1 more source

A Ridgeline-Based Terrain Co-registration for Satellite LiDAR Point Clouds in Rough Areas

open access: yesRemote Sensing, 2020
It is still a completely new and challenging task to register extensive, enormous and sparse satellite light detection and ranging (LiDAR) point clouds.
Ruqin Zhou, Wanshou Jiang
doaj   +1 more source

Centrifugal deformations of the gravitational kink [PDF]

open access: yes, 2008
The Kaluza-Klein reduction of 4d conformally flat spacetimes is reconsidered. The corresponding 3d equations are shown to be equivalent to 2d gravitational kink equations augmented by a centrifugal term. For space-like gauge fields and non-trivial values
Grumiller   +6 more
core   +1 more source

Prediction of the Size of the Fragment in Comminuted Coronoid Fracture Using the Contralateral Side: An Analysis of Similarity of Bilateral Ulnar Coronoid Morphology

open access: yesOrthopaedic Surgery, 2020
Objective To evaluate the morphological similarity of bilateral coronoid process. Methods A total of 128 sets of computed tomography images of bilateral coronoid process from patients between January 2015 and December 2016 were acquired for three ...
Hai‐long Zhang, Kun‐Jhih Lin, Yi Lu
doaj   +1 more source

Robust point correspondence applied to two and three-dimensional image registration [PDF]

open access: yes, 2002
Accurate and robust correspondence calculations are very important in many medical and biological applications. Often, the correspondence calculation forms part of a rigid registration algorithm, but accurate correspondences are especially important for ...
Baldock, R. A.   +4 more
core   +1 more source

Robust volume assessment of brain tissues for 3-dimensional fourier transformation MRI via a novel multispectral technique.

open access: yesPLoS ONE, 2015
A new TRIO algorithm method integrating three different algorithms is proposed to perform brain MRI segmentation in the native coordinate space, with no need of transformation to a standard coordinate space or the probability maps for segmentation.
Jyh-Wen Chai   +8 more
doaj   +1 more source

Wave-like Solutions for Bianchi type-I cosmologies in 5D [PDF]

open access: yes, 2008
We derive exact solutions to the vacuum Einstein field equations in 5D, under the assumption that (i) the line element in 5D possesses self-similar symmetry, in the classical understanding of Sedov, Taub and Zeldovich, and that (ii) the metric tensor is ...
Apostolopoulos P S   +17 more
core   +2 more sources

Construction of extended 3D field of views of the internal bladder wall surface: a proof of concept

open access: yes, 2016
3D extended field of views (FOVs) of the internal bladder wall facilitate lesion diagnosis, patient follow-up and treatment traceability. In this paper, we propose a 3D image mosaicing algorithm guided by 2D cystoscopic video-image registration for ...
Ben-Hamadou, Achraf   +2 more
core   +3 more sources

Quicksilver: Fast Predictive Image Registration - a Deep Learning Approach [PDF]

open access: yes, 2017
This paper introduces Quicksilver, a fast deformable image registration method. Quicksilver registration for image-pairs works by patch-wise prediction of a deformation model based directly on image appearance.
Kwitt, Roland   +3 more
core   +3 more sources

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