@Article{NegriDutrFreiLu:2016:ExCaAL,
author = "Negri, Rogerio Galante and Dutra, Luciano Vieira and Freitas,
Corina da Costa and Lu, Dengsheng",
affiliation = "{Universidade Estadual Paulista (UNESP)} and {Instituto Nacional
de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Michigan State University}",
title = "Exploring the capability of ALOS PALSAR L-band fully polarimetric
data for land cover classification in tropical environments",
journal = "IEEE Journal of Selected Topics in Applied Earth Observations and
Remote Sensing",
year = "2016",
volume = "9",
number = "12",
pages = "5369--5384",
month = "Dec.",
note = "{Setores de Atividade: Pesquisa e desenvolvimento
cient{\'{\i}}fico.}",
keywords = "Analise de Imagens, Radar de Abertura Sint{\'e}tica, Amazonia,
Amazon, assessment, image classification, polarimetric synthetic
aperture radar (PolSAR), scenarios, synthetic aperture radar
(SAR).",
abstract = "Among different applications using synthetic aperture radar (SAR)
data, land cover classification of rain forest areas has been
investigated. Previous results showed that L-band is more
appropriate for such applications. However, SAR images have
limited discriminability for mapping large sets of classes
compared with optical imagery. The objective of this study was to
carry out an analysis about the discriminative capability of an
L-band fully polarimetric SAR complex image, compared to the
possible subsets of polarizations in amplitude/intensity, for
mapping land cover classes in Amazon regions. Two case studies
using ALOS PALSAR L-band fully polarimetric images over Brazilian
Amazon regions were considered. Several thematic classes,
organized into scenarios, were considered for each case study.
These scenarios represent distinct classification tasks with
variated complexities. Performing a simultaneous analysis of
different scenarios is a distinct way to assess the discriminative
capability offered by a particular image. A methodology to
organize thematic classes into scenarios is proposed in this
study. The maximum likelihood classifier (MLC), with specific
distributions for SAR data, and support vector machine were
considered in this study. The iterated conditional modes algorithm
was adopted to incorporate the contextual information in both
methods. Considering a kappa coefficient equal to 0.8 as an
acceptable minimum, the experiments show that none subset of
polarization or fully polarimetric image allows performing
discrimination between forest and regeneration types;
single-polarized HV data provide acceptable results when the
classification problem deals with the discrimination of a few
classes; depending on the classification scenario, the
dual-polarized HH+HV image produces similar results when compared
to multipolarized (i.e., HH+HV+VV) data; in turn, if the MLC
method is adopted, multipolarized data may produce close or
statistically indifferent classification results compared to those
produced with the use of fully polarimetric data.",
doi = "10.1109/JSTARS.2016.2594133",
url = "http://dx.doi.org/10.1109/JSTARS.2016.2594133",
issn = "1939-1404 and 2151-1535",
label = "lattes: 9840759640842299 2 NegriDutrFreiLu:2016:ExCaAL",
language = "pt",
targetfile = "negri_exploring.pdf",
urlaccessdate = "07 maio 2024"
}