Dark endmember in spectral feature space under variable atmosphere


Choi, K.Y. and Milton, E.J. (2005) Dark endmember in spectral feature space under variable atmosphere. In, Proceedings of RSPSoc2005. Annual Conference of the Remote Sensing & Photogrammetry Society, with the 2005 NERC Earth Observation Conference. ‘Measuring, Mapping and Managing a Hazardous World’. RSPSoc2005. Annual Conference of the Remote Sensing & Photogrammetry Society, with the 2005 NERC Earth Observation Conference. ‘Measuring, Mapping and Managing a Hazardous World’ , Remote Sensing and Photogrammetry Society. (Submitted).

This is the latest version of this item.

Download

[img]
Preview
PDF
Download (1411Kb)

Description/Abstract

One of the most important assumptions in most multispectral image transformation methods is that the position of the dark endmember is placed at the origin of the n-D spectral feature space regardless of the target spectral signature. A series of field experiments under varying illumination resulted that ‘shadowlines’, which hypothetically pass through the dark endmember, never pass directly through the origin of the spectral feature space. A conceptual radiative transfer model was derived and demonstrated its susceptibility to the proportion of scattered light from the sky. The model showed that the location of the dark endmember, defined as the 'dark point virtual endmember (DPVE)’, is assumed to be sensitive to the state of atmosphere. Further analysis also revealed that the DPVE plays an important role in defining the data distribution in spectral feature space. This study suggested that accurate estimation of DPVE could enable to reduce some of the uncertainties associated with conventional dark point atmospheric correction methods.

Item Type: Book Section
Subjects: G Geography. Anthropology. Recreation > GA Mathematical geography. Cartography
Divisions: University Structure - Pre August 2011 > School of Geography > Remote Sensing and Spatial Analysis
ePrint ID: 24122
Date Deposited: 23 Mar 2006
Last Modified: 27 Mar 2014 18:13
Publisher: Remote Sensing and Photogrammetry Society
URI: http://eprints.soton.ac.uk/id/eprint/24122

Available Versions of this Item

Actions (login required)

View Item View Item