elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Datenschutz | Kontakt | English
Schriftgröße: [-] Text [+]

A New Concept of Soil Line Retrieval from Landsat 8 Images for Estimating Plant Biophysical Parameters

Ahmadian, Nima und Demattê, José A. M. und Xu, Dandan und Borg, Erik und Zölitz, Reinhard (2016) A New Concept of Soil Line Retrieval from Landsat 8 Images for Estimating Plant Biophysical Parameters. Remote Sensing, 8 (9), Seiten 1-23. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/rs8090738. ISSN 2072-4292.

[img] PDF
3MB

Offizielle URL: http://www.mdpi.com/2072-4292/8/9/738

Kurzfassung

Extraction of vegetation information from remotely sensed images has remained a long-term challenge due to the influence of soil background. To reduce this effect, the slope and intercept of the soil line (SL) should be known to calculate SL-related vegetation indices (VIs). These VIs can be used to estimate the biophysical parameters of agricultural crops. However, it is a difficult task to retrieve the SL parameters under the vegetation canopy. A feasible method for retrieving these parameters involves extracting the bottom boundary line in two-dimensional spectral spaces (i.e., red and near-infrared bands). In this study, the slope and intercept of the SL was extracted from Landsat 8 OLI images of a test site in northeastern Germany. Different statistical methods, including the Red-NIRmin method, quantile regression method (using a floating tau with the smallest p-value), and a new approach proposed in this paper using a fixed quantile tau known as the diffuse non-interceptance (DIFN) value, were applied to retrieve the SL parameters. The DIFN value describes the amount of light visible below the canopy that reaches the soil surface. Therefore, this value can be used as a threshold for retrieving the bottom soil line. The simulated SLs were compared with actual ones extracted from ground truth data, as recorded by a handheld spectrometer, and were also compared with the SL retrieved from bare soil pixels of the Landsat 8 image collected after harvest. Subsequently, the SL parameters were used to separately estimate the dry biomasses of winter wheat (Triticum aestivum L.), barley (Hordeum vulgare L.), and canola (Brassica napus L.) at the local and field scales using different SL-related vegetation indices. The SL can be retrieved more accurately at the local scale compared with the field scale, and its simulation can be critical in the field due to significant differences from the actual SL. Moreover, the slope and intercept of the simulated SLs found using the floating and fixed quantile tau (slope � 1.1 and intercept � 0.05) show better agreement with the actual SL parameters (slope � 1.2 and intercept � 0.03) in the late growing stages (i.e., end of ripening and senescence stages) of crops. The slope and intercept of the soil line extracted from bare soil pixels of the Landsat 8 OLI data after harvest (slope = 1.3, intercept = 0.03, and R2 = 0.94) are similar to those of the simulated SL. The correlation coefficient (R2) of the simulated SLs are greater than 0.97 during different growing stage and all of the SL parameters are statistically significant (p < 0.05) at the local scale. The results also imply the need for different vegetation indices to best retrieve the crop biomass depending on the growing stage, but relatively small differences in performances were observed in this study.

elib-URL des Eintrags:https://elib.dlr.de/105760/
Dokumentart:Zeitschriftenbeitrag
Titel:A New Concept of Soil Line Retrieval from Landsat 8 Images for Estimating Plant Biophysical Parameters
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Ahmadian, Nimaahmadian.n (at) gmail.comNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Demattê, José A. M.jamdemat (at) usp.brNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Xu, Dandanxudd0621 (at) gmail.comNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Borg, ErikErik.Borg (at) dlr.dehttps://orcid.org/0000-0001-8288-8426NICHT SPEZIFIZIERT
Zölitz, Reinhardzoelitz (at) uni-greifswald.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:9 September 2016
Erschienen in:Remote Sensing
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:8
DOI:10.3390/rs8090738
Seitenbereich:Seiten 1-23
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der HerausgeberHerausgeber-ORCID-iDORCID Put Code
Baghdadi, Nicolasremotesensing (at) mdpi.comNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Thenkabail, Prasad S.remotesensing (at) mdpi.comNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Verlag:Multidisciplinary Digital Publishing Institute (MDPI)
Name der Reihe:Remote Sensing
ISSN:2072-4292
Status:veröffentlicht
Stichwörter:remote sensing; soil line (SL); Landsat 8 OLI; soil line related vegetation indices biomass; bare soil; DEMMIN
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben Fernerkundung der Landoberfläche (alt)
Standort: Neustrelitz
Institute & Einrichtungen:Deutsches Fernerkundungsdatenzentrum > Nationales Bodensegment
Hinterlegt von: Borg, Prof.Dr. Erik
Hinterlegt am:19 Sep 2016 12:18
Letzte Änderung:22 Jun 2023 10:30

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Gestaltung Webseite und Datenbank: Copyright © Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.