Uncertainties Involved in the Use of Thresholds for the Detection of Water Bodies in Multitemporal Analysis from Landsat-8 and Sentinel-2 Images

Although the single threshold is still considered a suitable and easy-to-do technique to extract water features in spatiotemporal analysis, it leads to unavoidable errors. This paper uses an enumerative search to optimize thresholds over satellite-derived modified normalized difference water index (...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Luis Gustavo de Moura Reis, Wendson de Oliveira Souza, Alfredo Ribeiro Neto, Carlos Ruberto Fragoso, Antonio Miguel Ruiz-Armenteros, Jaime Joaquim da Silva Pereira Cabral, Suzana Maria Gico Lima Montenegro
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	MNDWI reservoir remote sensing water level tracking Poço da Cruz reservoir water spectral index Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/9eafa086b2bd4678aa4e056676a7d3cf
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:9eafa086b2bd4678aa4e056676a7d3cf
record_format	dspace
spelling	oai:doaj.org-article:9eafa086b2bd4678aa4e056676a7d3cf2021-11-25T18:56:53ZUncertainties Involved in the Use of Thresholds for the Detection of Water Bodies in Multitemporal Analysis from Landsat-8 and Sentinel-2 Images10.3390/s212274941424-8220https://doaj.org/article/9eafa086b2bd4678aa4e056676a7d3cf2021-11-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/22/7494https://doaj.org/toc/1424-8220Although the single threshold is still considered a suitable and easy-to-do technique to extract water features in spatiotemporal analysis, it leads to unavoidable errors. This paper uses an enumerative search to optimize thresholds over satellite-derived modified normalized difference water index (MNDWI). We employed a cross-validation approach and treated accuracy as a random variable in order to: (a) investigate uncertainty related to its application; (b) estimate non-optimistic errors involving single thresholding; (c) investigate the main factors that affect the accuracy’s model, and (d) compare satellite sensors performance. We also used a high-resolution digital elevation model to extract water elevations values, making it possible to remove topographic effects and estimate non-optimistic errors exclusively from orbital imagery. Our findings evidenced that there is a region where thresholds values can vary without causing accuracy loss. Moreover, by constraining thresholds variation between these limits, accuracy is dramatically improved and outperformed the Otsu method. Finally, the number of scenes employed to optimize a single threshold drastically affects the accuracy, being not appropriate using a single scene once it leads to overfitted threshold values. More than three scenes are recommended.Luis Gustavo de Moura ReisWendson de Oliveira SouzaAlfredo Ribeiro NetoCarlos Ruberto FragosoAntonio Miguel Ruiz-ArmenterosJaime Joaquim da Silva Pereira CabralSuzana Maria Gico Lima MontenegroMDPI AGarticleMNDWIreservoirremote sensingwater level trackingPoço da Cruz reservoirwater spectral indexChemical technologyTP1-1185ENSensors, Vol 21, Iss 7494, p 7494 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	MNDWI reservoir remote sensing water level tracking Poço da Cruz reservoir water spectral index Chemical technology TP1-1185
spellingShingle	MNDWI reservoir remote sensing water level tracking Poço da Cruz reservoir water spectral index Chemical technology TP1-1185 Luis Gustavo de Moura Reis Wendson de Oliveira Souza Alfredo Ribeiro Neto Carlos Ruberto Fragoso Antonio Miguel Ruiz-Armenteros Jaime Joaquim da Silva Pereira Cabral Suzana Maria Gico Lima Montenegro Uncertainties Involved in the Use of Thresholds for the Detection of Water Bodies in Multitemporal Analysis from Landsat-8 and Sentinel-2 Images
description	Although the single threshold is still considered a suitable and easy-to-do technique to extract water features in spatiotemporal analysis, it leads to unavoidable errors. This paper uses an enumerative search to optimize thresholds over satellite-derived modified normalized difference water index (MNDWI). We employed a cross-validation approach and treated accuracy as a random variable in order to: (a) investigate uncertainty related to its application; (b) estimate non-optimistic errors involving single thresholding; (c) investigate the main factors that affect the accuracy’s model, and (d) compare satellite sensors performance. We also used a high-resolution digital elevation model to extract water elevations values, making it possible to remove topographic effects and estimate non-optimistic errors exclusively from orbital imagery. Our findings evidenced that there is a region where thresholds values can vary without causing accuracy loss. Moreover, by constraining thresholds variation between these limits, accuracy is dramatically improved and outperformed the Otsu method. Finally, the number of scenes employed to optimize a single threshold drastically affects the accuracy, being not appropriate using a single scene once it leads to overfitted threshold values. More than three scenes are recommended.
format	article
author	Luis Gustavo de Moura Reis Wendson de Oliveira Souza Alfredo Ribeiro Neto Carlos Ruberto Fragoso Antonio Miguel Ruiz-Armenteros Jaime Joaquim da Silva Pereira Cabral Suzana Maria Gico Lima Montenegro
author_facet	Luis Gustavo de Moura Reis Wendson de Oliveira Souza Alfredo Ribeiro Neto Carlos Ruberto Fragoso Antonio Miguel Ruiz-Armenteros Jaime Joaquim da Silva Pereira Cabral Suzana Maria Gico Lima Montenegro
author_sort	Luis Gustavo de Moura Reis
title	Uncertainties Involved in the Use of Thresholds for the Detection of Water Bodies in Multitemporal Analysis from Landsat-8 and Sentinel-2 Images
title_short	Uncertainties Involved in the Use of Thresholds for the Detection of Water Bodies in Multitemporal Analysis from Landsat-8 and Sentinel-2 Images
title_full	Uncertainties Involved in the Use of Thresholds for the Detection of Water Bodies in Multitemporal Analysis from Landsat-8 and Sentinel-2 Images
title_fullStr	Uncertainties Involved in the Use of Thresholds for the Detection of Water Bodies in Multitemporal Analysis from Landsat-8 and Sentinel-2 Images
title_full_unstemmed	Uncertainties Involved in the Use of Thresholds for the Detection of Water Bodies in Multitemporal Analysis from Landsat-8 and Sentinel-2 Images
title_sort	uncertainties involved in the use of thresholds for the detection of water bodies in multitemporal analysis from landsat-8 and sentinel-2 images
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9eafa086b2bd4678aa4e056676a7d3cf
work_keys_str_mv	AT luisgustavodemourareis uncertaintiesinvolvedintheuseofthresholdsforthedetectionofwaterbodiesinmultitemporalanalysisfromlandsat8andsentinel2images AT wendsondeoliveirasouza uncertaintiesinvolvedintheuseofthresholdsforthedetectionofwaterbodiesinmultitemporalanalysisfromlandsat8andsentinel2images AT alfredoribeironeto uncertaintiesinvolvedintheuseofthresholdsforthedetectionofwaterbodiesinmultitemporalanalysisfromlandsat8andsentinel2images AT carlosrubertofragoso uncertaintiesinvolvedintheuseofthresholdsforthedetectionofwaterbodiesinmultitemporalanalysisfromlandsat8andsentinel2images AT antoniomiguelruizarmenteros uncertaintiesinvolvedintheuseofthresholdsforthedetectionofwaterbodiesinmultitemporalanalysisfromlandsat8andsentinel2images AT jaimejoaquimdasilvapereiracabral uncertaintiesinvolvedintheuseofthresholdsforthedetectionofwaterbodiesinmultitemporalanalysisfromlandsat8andsentinel2images AT suzanamariagicolimamontenegro uncertaintiesinvolvedintheuseofthresholdsforthedetectionofwaterbodiesinmultitemporalanalysisfromlandsat8andsentinel2images
_version_	1718410543911403520

Uncertainties Involved in the Use of Thresholds for the Detection of Water Bodies in Multitemporal Analysis from Landsat-8 and Sentinel-2 Images

Ejemplares similares