Results 41 to 50 of about 1,296,267 (363)

Robust semi-automated path extraction for visualising stenosis of the coronary arteries [PDF]

, 2008
Computed tomography angiography (CTA) is useful for diagnosing and planning treatment of heart disease. However, contrast agent in surrounding structures (such as the aorta and left ventricle) makes 3-D visualisation of the coronary arteries difficult ...
Achenbach, Andrews, Anthony Maeder, Antiga, Aylward, Aylward, Barrett, Beare, Boskamp, Chen, Chen, Daniel Mueller, Fishman, Frangi, Hahn, Holtzman-Gazit, Jomier, Kanitsar, Kimmel, Kirbas, Krissian, Lorigo, Manniesing, Manniesing, Maurer, Mueller, Pannu, Pudney, Sato, Sethian, Soille, Sonka, van Droogenbroeck, van Droogenbroeck, van Herk, van Ooijen, Warfield, Wesarg, Wesarg, Wink, Wink, Wink, Yan, Zou   +43 more
core   +2 more sources

EikoNet traveltime calculation method and application based on deep neural network

地球与行星物理论评, 2023
Seismic wave traveltime calculation plays an important role in many areas of seismology, such as seismic tomography, migration and microseismic location.
Shi Yao, Jue Hou, Yuepeng Huang, Tao Xu, Zhiming Bai, Zhenghui Gao   +5 more
doaj   +1 more source

Application of Snell's law in reflection raytracing using the multistage fast marching method

Earthquake Research Advances, 2021
Accurate calculations of travel times and raypaths of reflection waves are important for reflection travel time tomography. The multistage shortest path method (MSPM) and multistage fast marching method (MFMM) have been widely used in reflection wave ...
Xingzhong Li, Wei Zhang
doaj   +1 more source

Redundancy in All Pairs Fast Marching Method [PDF]

2006 International Conference on Image Processing, 2006
In this paper, we analyze the redundancy in calculating all pairs of geodesic distances on a rectangular grid. Fast marching method is an efficient way to estimate the geodesic distances from a point. But when calculated for all the points on the grid, this introduces certain redundancy.
Luca Bertelli, Baris Sumengen, B.S. Manjunath   +2 more
openaire   +1 more source

Can local single-pass methods solve any stationary Hamilton-Jacobi-Bellman equation? [PDF]

, 2013
The use of local single-pass methods (like, e.g., the Fast Marching method) has become popular in the solution of some Hamilton-Jacobi equations. The prototype of these equations is the eikonal equation, for which the methods can be applied saving CPU ...
Cacace, Simone, Cristiani, Emiliano, Falcone, Maurizio   +2 more
core   +4 more sources

A Comparison of Local Path Planning Techniques of Autonomous Surface Vehicles for Monitoring Applications: The Ypacarai Lake Case-study

Sensors, 2020
Local path planning is important in the development of autonomous vehicles since it allows a vehicle to adapt their movements to dynamic environments, for instance, when obstacles are detected.
Federico Peralta, Mario Arzamendia, Derlis Gregor, Daniel G. Reina, Sergio Toral   +4 more
doaj   +1 more source

Fast Marching Techniques for Teaming UAV’s Applications in Complex Terrain

Drones, 2023
In this paper, we present a study on coverage missions carried out by UAV formations in 3D environments. These missions are designed to be applied in tracking and search and rescue missions, especially in the case of accidents.
Santiago Garrido, Javier Muñoz, Blanca López, Fernando Quevedo, Concepción A. Monje, Luis Moreno   +5 more
doaj   +1 more source

EDGE PRESERVING FILTERS USING GEODESIC DISTANCES ON WEIGHTED ORTHOGONAL DOMAINS [PDF]

, 2008
We introduce a framework for image enhancement, which smooths images while preserving edge information. Domain (spatial) and range (feature) information are combined in one single measure in a principled way.
B. S. Manjunath, Luca Bertelli
core   +2 more sources

Calculation of AGARD Wing 445.6 Flutter Using Navier-Stokes Aerodynamics [PDF]

, 1993
An unsteady, 3D, implicit upwind Euler/Navier-Stokes algorithm is here used to compute the flutter characteristics of Wing 445.6, the AGARD standard aeroelastic configuration for dynamic response, with a view to the discrepancy between Euler ...
Anderson W. K., Anderson W. K., Baldwin B., Batina J. T., Bennett R.M., Cunningham H. J., Desmarais R. N., Edwards J. W., Equations, Johnson D., Lee-Rausch E. M., Mohr R. W., Obayashi S., Rausch D., Rausch R. D., Rausch R.D., Robinson B. A., Seidel D. A., Wings, Yang T. Y., Yates E. C., Yates E. C., Jr.   +21 more
core   +3 more sources

Anisotropic Fast-Marching on cartesian grids using Lattice Basis Reduction [PDF]

, 2014
We introduce a modification of the Fast Marching Algorithm, which solves the generalized eikonal equation associated to an arbitrary continuous riemannian metric, on a two or three dimensional domain.
Jean-Marie Mirebeau, Sermesant M.
core   +3 more sources