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Exploring the Measurement Of Forests With Full Waveform LIDAR through Monte-Carlo Ray Tracing
Forestry structure lidar vegetation simulation 3D modelling satellite
2015/11/20
The error of the height estimates are precisely quantified by comparison with the 3D model height. This paper discusses the development and testing of the inversion of tree height from simulations of ...
RAY TRACING FOR MODELING OF SMALL FOOTPRINT AIRBORNE LASER SCANNING RETURNS
RAY TRACING FOR MODELING SMALL FOOTPRINT AIRBORNE LASER SCANNING RETURNS
2015/11/10
Airborne Laser Scanning (ALS) has been established as a valuable tool for the estimation of biophysical canopy variables, such as tree height and vegetation density. However, up to now most approaches...
MODELING OF SMALL FOOTPRINT AIRBORNE LASER SCANNING RETURNS USING RAY-TRACING AND L-SYSTEMS
Physical modeling remote sensing
2015/9/8
Airborne Laser Scanning (ALS) has been established as a valuable tool for the estimation of biophysical
canopy variables, such as tree height and vegetation density. However, up to now most approache...
USING MONTE-CARLO RAY TRACING TO INVESTIGATE THE MEASUREMENT OF FOREST PARAMETERS WITH THE ECHIDNATM LASER SCANNER
Canopy foliage lidar
2015/9/8
A Monte-Carlo ray tracer has been developed from a previous system to simulate a ground based, full waveform laser ranger, such as
the Echidna? Overlapping scans have been simulated using a geometric...
Acoustic ray tracing in the atmosphere: with gravitational effect and attenuation considered
Acoustic ray tracing Dissipative dispersion relation Gravity effect Attenuation
2015/8/18
An acoustic ray tracing model is developed to take into account the impacts of gravitational field and realistic atmospheric attenuation. Ray tracing equations are deduced from the real part of the di...
REFLECTANCE ESTIMATION FROM URBAN TERRESTRIAL IMAGES: VALIDATION OF A SYMBOLIC RAY-TRACING METHOD ON SYNTHETIC DATA
Radiometry reflectance BRDF ray-tracing terrestrial images
2014/5/8
Terrestrial geolocalized images are nowadays widely used on the Internet, mainly in urban areas, through immersion services such as Google Street View. On the long run, we seek to enhance the visualiz...
Adaptive image ray-tracing for astrophysical simulations
Adaptive image ray-tracing astrophysical simulations
2011/1/11
A technique is presented for producing synthetic images from numerical simulations whereby the image resolution is adapted around prominent features. In so doing, adaptive image ray-tracing (AIR) impr...
A Ray-Tracing Algorithm for Spinning Compact Object Spacetimes with Arbitrary Quadrupole Moments. I. Quasi-Kerr Black Holes
black hole physics radiative transfer relativity
2010/12/21
We describe a new numerical algorithm for ray tracing in the external spacetimes of spinning compact objects characterized by arbitrary quadrupole moments. Such spacetimes describe non-Kerr vacuum sol...
A bias in cosmic shear from galaxy selection: results from ray-tracing simulations
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/22
We identify and study a previously unknown systematic effect on cosmic shear measurements, caused by the selection of galaxies used for shape measurement, in particular the rejection of close (blended...
The contact and immersion ultrasound methods compared using the ray tracing method
biometry ultrasound measurement immersion and contact method ray tracing
2011/5/6
The goal of this article was to compare the contact and immersion ultrasound methods using
simulated data. The pursued changes were interrelated with both the axial length of the eye and
with partia...
Construction of Algorithms for Optimal Fermat Ray Tracing
RAY-TRACING STUDY ABOUT INITIAL CONDITIONS OF MULTICOMPONENT WHISTLERS IN THE ASYMMETRIC MODEL OF THE MAGNETOSPHERE
RAY-TRACING MAGNETOSPHERE MULTICOMPONENT WHISTLERS
2009/4/16
RAY-TRACING STUDY ABOUT INITIAL CONDITIONS OF MULTICOMPONENT WHISTLERS IN THE ASYMMETRIC MODEL OF THE MAGNETOSPHERE。
Application of shortest path ray tracing to irregularly tetrahedralized model space
Shortest path ray tracing tetrahedron
2009/3/5
A way to apply the shortest path ray tracing (SPR) method to irregularly tetrahedralized velocity structure and its efficiency are described. SPR is the ray tracing method utilizing Dijkstra's shorte...
RAY TRACING AND SAR-TOMOGRAPHY FOR 3D ANALYSIS OF MICROWAVE SCATTERING AT MAN-MADE OBJECTS
SAR Simulation Ray Tracing POV Ray SAR Tomography TerraSAR-X
2016/3/1
An inherent drawback of SAR imaging of complex 3D structures is the potential layover of more than one scatterer in one resolution
cell. Such scatterers can be separated by tomographic processing of...
Skew ray tracing and error analysis of optical elements with ellipsoid boundary surfaces
skew ray tracing error analysis
2011/5/6
Utilizing a ray tracing approach based upon Snell’s optical laws and a 4×4 homogeneous coordinate transformation matrix, this study conducts a systematic analysis of the errors induced in the paths of...