Improving the empirical line method applied to hyperspectral inland water images by combining reference targets and in situ water measurements

Página do item simplificado
dc.contributor.authordo Carmo, Alisson Fernando Coelho [UNESP]
dc.contributor.authorBernardo, Nariane Marselhe Ribeiro [UNESP]
dc.contributor.authorImai, Nilton Nobuhiro [UNESP]
dc.contributor.authorShimabukuro, Milton Hirokazu [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2020-12-12T01:47:47Z
dc.date.available2020-12-12T01:47:47Z
dc.date.issued2020-02-01
dc.description.abstractEmpirical line methods are frequently used to correct images from remote sensing. This method is performed in two steps: the first stage finds the calibration equation representing the data interval and the second step transforms the image data into the quantity established from the equation. Several works have been successfully applied empirical lines over land areas, but it is still a great challenge to correct images from waterbodies. Remote sensing of aquatic environments captures only a small amount of energy because the water absorbs much of it. The response signal of the water is smaller than the signal from other land surface targets. This work presents a new approach to calibrate empirical lines combining reference panels with a water point. For this purpose, we evaluated several combinations of targets using both linear and exponential fit. The best matching was provided with an exponential fit using a single grey reference panel combined with a water point resulting in a coefficient of determination about 0.87, a root-mean-squared error of 0.002 sr−1 and a mean absolute percentage error of 18%. This approach presented suitable results to derive reflectance data from the raw digital numbers from images.en
dc.description.affiliationSão Paulo State University (UNESP) Faculty of Sciences and Technology (FCT) Graduate Program of Cartographic Sciences (PPGCC) Campus Presidente Prudente–Brazil
dc.description.affiliationUnespSão Paulo State University (UNESP) Faculty of Sciences and Technology (FCT) Graduate Program of Cartographic Sciences (PPGCC) Campus Presidente Prudente–Brazil
dc.format.extent186-194
dc.identifierhttp://dx.doi.org/10.1080/2150704X.2019.1692383
dc.identifier.citationRemote Sensing Letters, v. 11, n. 2, p. 186-194, 2020.
dc.identifier.doi10.1080/2150704X.2019.1692383
dc.identifier.issn2150-7058
dc.identifier.issn2150-704X
dc.identifier.lattes1184195536814806
dc.identifier.lattes2985771102505330
dc.identifier.orcid0000-0003-0516-0567
dc.identifier.scopus2-s2.0-85075729612
dc.identifier.urihttp://hdl.handle.net/11449/199730
dc.language.isoeng
dc.relation.ispartofRemote Sensing Letters
dc.sourceScopus
dc.titleImproving the empirical line method applied to hyperspectral inland water images by combining reference targets and in situ water measurementsen
dc.typeArtigo
unesp.author.lattes1184195536814806
unesp.author.lattes2985771102505330[3]
unesp.author.orcid0000-0002-3439-1252[1]
unesp.author.orcid0000-0002-8292-3102[2]
unesp.author.orcid0000-0003-0516-0567[3]
unesp.author.orcid0000-0002-6740-7863[4]

Arquivos

Coleções

Artigos - Cartografia - FCT