Results 101 to 110 of about 12,499 (195)

Evaluation of MODIS and VIIRS BRDF Parameter Differences and Their Impacts on the Derived Indices

open access: yesRemote Sensing
Multi-angle remote sensing observations play an important role in the remote sensing of solar radiation absorbed by land surfaces. Currently, the Moderate Resolution Imaging Spectroradiometer (MODIS) and Visible Infrared Imaging Radiometer Suite (VIIRS ...
Chenxia Wang   +9 more
doaj   +1 more source

Correlation studies on surface particle detection methods [PDF]

open access: yes
The accurate determination of dust levels on optical surfaces is necessary to assess sensor system performance. A comparison study was made on several particle measurement methods including those based on direct imaging and light scattering.
Peterson, Ronald V., White, James C.
core   +1 more source

Experimentally-Derived Phase Function Approximations in Support of the Orbital Debris Program Office [PDF]

open access: yes
The NASA Orbital Debris Program Office (ODPO) has used various optical assets to acquire photometric data of Earth-orbiting objects to define the orbital debris environment.
Cowardin, H., Hostetler, J.
core   +1 more source

Sparse BRDF Approximation using Compressive Sensing

open access: yes, 2013
International audienceWe experiment a BRDF acquisiton method from a single picture, knowing geometry and illumination. To tackle such a severely underconstrained problem, we express the BRDF in a high dimensional basis, and perform the reconstruction ...
Soler, Cyril, Zupancic, Benoît
core  

A new lab facility for measuring bidirectional reflectance/emittance distribution functions of soils and canopies [PDF]

open access: yes
Recently, a laboratory measurement facility has been realized for assessing the anisotropic reflectance and emittance behaviour of soils, leaves and small canopies under controlled illumination conditions.
Bartholomeus, H.   +7 more
core   +2 more sources

Importance Sampling BRDF Derivatives

open access: yesACM Transactions on Graphics
We propose a set of techniques to efficiently importance sample the derivatives of a wide range of Bidirectional Reflectance Distribution Function (BRDF) models. In differentiable rendering, BRDFs are replaced by their differential BRDF counterparts, which are real-valued and can have negative values. This leads to a new source of variance arising from
Yash Belhe   +4 more
openaire   +2 more sources

Uncertainties for Pre- and Post-Launch Radiometric Calibration of Imaging Spectrometers for Multi-Sensor Applications [PDF]

open access: yes
An important aspect to using imaging spectrometer data is the radiometric characterization and calibration of the sensors and validation of their data products and doing so with error budgets with known traceability.
Bachmann, M., Ong, C., Thome, K.
core   +1 more source

BRDF Reconstruction Using Compressive Sensing

open access: yes, 2013
21st International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision -- JUN 24-27, 2013 -- Pilsen, CZECH ...
Ergun, Serkan   +2 more
openaire   +3 more sources

Virtual gonio-spectrophotometer for validation of BRDF designs

open access: yesOpen Physics, 2011
Mihálik Andrej, Ďurikovič Roman
doaj   +1 more source

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