scholarly journals In-scene LWIR downwelling radiance estimation

2016 ◽  
Author(s):  
M. Pieper ◽  
D. Manolakis ◽  
E. Truslow ◽  
T. Cooley ◽  
M. Brueggeman ◽  
...  
Keyword(s):  
Radiance Estimation

scholarly journals Background Radiance Estimation for Gas Plume Quantification for Airborne Hyperspectral Thermal Imaging

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
Ramzi Idoughi ◽  
Thomas H. G. Vidal ◽  
Pierre-Yves Foucher ◽  
Marc-André Gagnon ◽  
Xavier Briottet
Keyword(s):  
Synthetic Data ◽  
Hyperspectral Data ◽  
Trace Gas ◽  
Gas Concentration ◽  
Components Analysis ◽  
The Difference ◽  
Long Wave Infrared ◽  
Radiance Estimation

Hyperspectral imaging in the long-wave infrared (LWIR) is a mean that is proving its worth in the characterization of gaseous effluent. Indeed the spectral and spatial resolution of acquisition instruments is steadily decreasing, making the gases characterization increasingly easy in the LWIR domain. The majority of literature algorithms exploit the plume contribution to the radiance corresponding to the difference of radiance between the plume-present and plume-absent pixels. Nevertheless, the off-plume radiance is unobservable using a single image. In this paper, we propose a new method to retrieve trace gas concentration from airborne infrared hyperspectral data. More particularly the outlined method improves the existing background radiance estimation approach to deal with heterogeneous scenes corresponding to industrial scenes. It consists in performing a classification of the scene and then applying a principal components analysis based method to estimate the background radiance on each cluster stemming from the classification. In order to determine the contribution of the classification to the background radiance estimation, we compared the two approaches on synthetic data and Telops Fourier Transform Spectrometer (FTS) Imaging Hyper-Cam LW airborne acquisition above ethylene release. We finally show ethylene retrieved concentration map and estimate flow rate of the ethylene release.

scholarly journals A comprehensive theory of volumetric radiance estimation using photon points and beams

2011 ◽  
Vol 30 (1) ◽  
pp. 1-19 ◽  
Author(s):  
Wojciech Jarosz ◽  
Derek Nowrouzezahrai ◽  
Iman Sadeghi ◽  
Henrik Wann Jensen
Keyword(s):  
Comprehensive Theory ◽  
Radiance Estimation

A path radiance estimation algorithm using reflectance measurements in radiometric control areas

2011 ◽  
Vol 33 (5) ◽  
pp. 1543-1566 ◽  
Author(s):  
K. S. Cheng ◽  
Y. F. Su ◽  
H. C. Yeh ◽  
J. H. Chang ◽  
W. C. Hung
Keyword(s):  
Estimation Algorithm ◽  
Reflectance Measurements ◽  
Radiance Estimation

Comparison of four luminance and radiance angular distribution models for radiance estimation

Solar Energy ◽  
2011 ◽  
Vol 85 (9) ◽  
pp. 2202-2216 ◽  
Author(s):  
A. Gracia ◽  
J.L. Torres ◽  
M. De Blas ◽  
A. García ◽  
R. Perez
Keyword(s):  
Angular Distribution ◽  
Distribution Models ◽  
Radiance Estimation

Advanced Radiance Estimation For Photon Map Global Illumination

2002 ◽  
Vol 21 (3) ◽  
pp. 541-545 ◽  
Author(s):  
Heinrich Hey ◽  
Werner Purgathofer
Keyword(s):  
Global Illumination ◽  
Radiance Estimation

Scene Radiance Estimation from Human Corneal Reflections

2014 ◽  
Author(s):  
Shoji Tominaga ◽  
Ryo Ohtera ◽  
Shogo Nishi
Keyword(s):  
Radiance Estimation
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