DocumentCode :
3298837
Title :
The impact of viewing geometry on vision through the atmosphere
Author :
Suen, Pei-hsiu ; Healey, Glenn ; Slater, David
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Irvine, CA, USA
Volume :
2
fYear :
2001
fDate :
2001
Firstpage :
454
Abstract :
An increase in the off-nadir viewing angle for an airborne visible/near-infrared through short-wave infrared (VNIR/SWIR) imaging spectrometer leads to a decrease in upward atmospheric transmittance and an increase in line-of-sight scattered path radiance. These effects combine to reduce the spectral contrast between different materials in the sensed signal. We analyze the impact of viewing angle on material discriminability for 237 materials over a wide range of conditions. Material discriminability is quantified using a statistical algorithm that employs a subspace model to represent the set of spectra for a material as conditions vary. We show that reliable material discrimination is possible over a range of conditions even for large off-nadir viewing angles. We illustrate the performance of material identification over different viewing angles using simulated forest hyperspectral images
Keywords :
computational geometry; image processing; infrared imaging; terrain mapping; imaging spectrometer; material discriminability; material identification; off-nadir viewing angles; simulated forest hyperspectral images; spectral contrast; viewing geometry; Atmosphere; Geometry; Hyperspectral imaging; Hyperspectral sensors; Infrared imaging; Infrared spectra; Materials reliability; Optical imaging; Scattering; Spectroscopy;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer Vision, 2001. ICCV 2001. Proceedings. Eighth IEEE International Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7695-1143-0
Type :
conf
DOI :
10.1109/ICCV.2001.937660
Filename :
937660
Link To Document :
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