Loading…

A simple, binary classification algorithm for the detection of Trichodesmium spp. within the Great Barrier Reef using MODIS imagery

A binary classification algorithm to detect the presence of high surface concentrations of the nitrogen‐fixing cyanobacterium Trichodesmium spp. was developed for high spatial resolution (250 m) imagery of the Moderate‐resolution Imaging Spectroradiometer (MODIS). Above‐water hyperspectral radiometr...

Full description

Saved in:
Bibliographic Details
Published in:Limnology and oceanography, methods methods, 2011-02, Vol.9 (2), p.50-66
Main Authors: McKinna, Lachlan I.W., Furnas, Miles J., Ridd, Peter V.
Format: Article
Language:English
Subjects:
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by cdi_FETCH-LOGICAL-c4220-fddeef077dc3e573cd0ea9c4218e9b193336ac43a1ac9c15736af60815e033ee3
cites
container_end_page 66
container_issue 2
container_start_page 50
container_title Limnology and oceanography, methods
container_volume 9
creator McKinna, Lachlan I.W.
Furnas, Miles J.
Ridd, Peter V.
description A binary classification algorithm to detect the presence of high surface concentrations of the nitrogen‐fixing cyanobacterium Trichodesmium spp. was developed for high spatial resolution (250 m) imagery of the Moderate‐resolution Imaging Spectroradiometer (MODIS). Above‐water hyperspectral radiometric measurements of dense Trichodesmium surface aggregations (>10 µg/L Chlorophyll a) showed that the water‐leaving radiance Lw at wavelengths greater than 700 nm were much higher in magnitude (>0.05 W m−2sr−1) relative to the visible wavelengths 400–700 nm (
doi_str_mv 10.4319/lom.2011.9.50
format article
fullrecord <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1780518613</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>1780518613</sourcerecordid><originalsourceid>FETCH-LOGICAL-c4220-fddeef077dc3e573cd0ea9c4218e9b193336ac43a1ac9c15736af60815e033ee3</originalsourceid><addsrcrecordid>eNp90LFOwzAQBuAIgUQpjOweGUiw4ziJx1KgVGpVCcpsuc6lNUriYCeqMvPiuC0DE5PPuu9Opz8IbgmOEkr4Q2XqKMaERDxi-CwYEZaQkOUsPf9TXwZXzn1iHPMky0bB9wQ5XbcV3KONbqQdkKqkc7rUSnbaNEhWW2N1t6tRaSzqdoAK6EAde6ZEa6vVzhTgat3XyLVthPZe6-ZIZxZkhx6ltRosegMoUe90s0XL1dP8HelabsEO18FFKSsHN7_vOPh4eV5PX8PFajafThahSuIYh2VR-AU4ywpFgWVUFRgk9z2SA98QTilNpUqoJFJxRbxIZZninDDAlALQcXB32tta89WD60StnYKqkg2Y3gmS5ZiRPCXU0_BElTXOWShFa_21dhAEi0PYwoctDmELLhj2Pj35va5g-B-LxWpJ_Q9zP_gDV3CE6w</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1780518613</pqid></control><display><type>article</type><title>A simple, binary classification algorithm for the detection of Trichodesmium spp. within the Great Barrier Reef using MODIS imagery</title><source>Wiley</source><creator>McKinna, Lachlan I.W. ; Furnas, Miles J. ; Ridd, Peter V.</creator><creatorcontrib>McKinna, Lachlan I.W. ; Furnas, Miles J. ; Ridd, Peter V.</creatorcontrib><description>A binary classification algorithm to detect the presence of high surface concentrations of the nitrogen‐fixing cyanobacterium Trichodesmium spp. was developed for high spatial resolution (250 m) imagery of the Moderate‐resolution Imaging Spectroradiometer (MODIS). Above‐water hyperspectral radiometric measurements of dense Trichodesmium surface aggregations (&gt;10 µg/L Chlorophyll a) showed that the water‐leaving radiance Lw at wavelengths greater than 700 nm were much higher in magnitude (&gt;0.05 W m−2sr−1) relative to the visible wavelengths 400–700 nm (&lt;0.03 W m−2sr−1). The binary classification algorithm is based on three criteria. The first criteria relied on the difference in magnitude between the MODIS normalized water‐leaving radiance (nLw) at the 859 and 678 nm wavebands. The magnitude of the nLw at the 555 and 645 nm wavebands relative to nLw 678 nm waveband formed the second and third criteria, respectively. The classification algorithm was tested on a small subset of 13 MODIS images with corresponding Trichodesmium sea‐truths and yielded an 85% accuracy. Fine‐scale features consistent with dense Trichodesmium surface aggregations, such as eddy swirls and windrows, appear to be well represented with the algorithm results. The algorithm was also found to be robust in the presence of highly reflective, potential confounding effects.</description><identifier>ISSN: 1541-5856</identifier><identifier>EISSN: 1541-5856</identifier><identifier>DOI: 10.4319/lom.2011.9.50</identifier><language>eng</language><subject>Cyanobacteria ; Marine</subject><ispartof>Limnology and oceanography, methods, 2011-02, Vol.9 (2), p.50-66</ispartof><rights>2011, by the Association for the Sciences of Limnology and Oceanography, Inc.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4220-fddeef077dc3e573cd0ea9c4218e9b193336ac43a1ac9c15736af60815e033ee3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>McKinna, Lachlan I.W.</creatorcontrib><creatorcontrib>Furnas, Miles J.</creatorcontrib><creatorcontrib>Ridd, Peter V.</creatorcontrib><title>A simple, binary classification algorithm for the detection of Trichodesmium spp. within the Great Barrier Reef using MODIS imagery</title><title>Limnology and oceanography, methods</title><description>A binary classification algorithm to detect the presence of high surface concentrations of the nitrogen‐fixing cyanobacterium Trichodesmium spp. was developed for high spatial resolution (250 m) imagery of the Moderate‐resolution Imaging Spectroradiometer (MODIS). Above‐water hyperspectral radiometric measurements of dense Trichodesmium surface aggregations (&gt;10 µg/L Chlorophyll a) showed that the water‐leaving radiance Lw at wavelengths greater than 700 nm were much higher in magnitude (&gt;0.05 W m−2sr−1) relative to the visible wavelengths 400–700 nm (&lt;0.03 W m−2sr−1). The binary classification algorithm is based on three criteria. The first criteria relied on the difference in magnitude between the MODIS normalized water‐leaving radiance (nLw) at the 859 and 678 nm wavebands. The magnitude of the nLw at the 555 and 645 nm wavebands relative to nLw 678 nm waveband formed the second and third criteria, respectively. The classification algorithm was tested on a small subset of 13 MODIS images with corresponding Trichodesmium sea‐truths and yielded an 85% accuracy. Fine‐scale features consistent with dense Trichodesmium surface aggregations, such as eddy swirls and windrows, appear to be well represented with the algorithm results. The algorithm was also found to be robust in the presence of highly reflective, potential confounding effects.</description><subject>Cyanobacteria</subject><subject>Marine</subject><issn>1541-5856</issn><issn>1541-5856</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNp90LFOwzAQBuAIgUQpjOweGUiw4ziJx1KgVGpVCcpsuc6lNUriYCeqMvPiuC0DE5PPuu9Opz8IbgmOEkr4Q2XqKMaERDxi-CwYEZaQkOUsPf9TXwZXzn1iHPMky0bB9wQ5XbcV3KONbqQdkKqkc7rUSnbaNEhWW2N1t6tRaSzqdoAK6EAde6ZEa6vVzhTgat3XyLVthPZe6-ZIZxZkhx6ltRosegMoUe90s0XL1dP8HelabsEO18FFKSsHN7_vOPh4eV5PX8PFajafThahSuIYh2VR-AU4ywpFgWVUFRgk9z2SA98QTilNpUqoJFJxRbxIZZninDDAlALQcXB32tta89WD60StnYKqkg2Y3gmS5ZiRPCXU0_BElTXOWShFa_21dhAEi0PYwoctDmELLhj2Pj35va5g-B-LxWpJ_Q9zP_gDV3CE6w</recordid><startdate>201102</startdate><enddate>201102</enddate><creator>McKinna, Lachlan I.W.</creator><creator>Furnas, Miles J.</creator><creator>Ridd, Peter V.</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>F1W</scope><scope>H95</scope><scope>KL.</scope><scope>L.G</scope></search><sort><creationdate>201102</creationdate><title>A simple, binary classification algorithm for the detection of Trichodesmium spp. within the Great Barrier Reef using MODIS imagery</title><author>McKinna, Lachlan I.W. ; Furnas, Miles J. ; Ridd, Peter V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4220-fddeef077dc3e573cd0ea9c4218e9b193336ac43a1ac9c15736af60815e033ee3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Cyanobacteria</topic><topic>Marine</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>McKinna, Lachlan I.W.</creatorcontrib><creatorcontrib>Furnas, Miles J.</creatorcontrib><creatorcontrib>Ridd, Peter V.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological &amp; Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 1: Biological Sciences &amp; Living Resources</collection><collection>Meteorological &amp; Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Professional</collection><jtitle>Limnology and oceanography, methods</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>McKinna, Lachlan I.W.</au><au>Furnas, Miles J.</au><au>Ridd, Peter V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A simple, binary classification algorithm for the detection of Trichodesmium spp. within the Great Barrier Reef using MODIS imagery</atitle><jtitle>Limnology and oceanography, methods</jtitle><date>2011-02</date><risdate>2011</risdate><volume>9</volume><issue>2</issue><spage>50</spage><epage>66</epage><pages>50-66</pages><issn>1541-5856</issn><eissn>1541-5856</eissn><abstract>A binary classification algorithm to detect the presence of high surface concentrations of the nitrogen‐fixing cyanobacterium Trichodesmium spp. was developed for high spatial resolution (250 m) imagery of the Moderate‐resolution Imaging Spectroradiometer (MODIS). Above‐water hyperspectral radiometric measurements of dense Trichodesmium surface aggregations (&gt;10 µg/L Chlorophyll a) showed that the water‐leaving radiance Lw at wavelengths greater than 700 nm were much higher in magnitude (&gt;0.05 W m−2sr−1) relative to the visible wavelengths 400–700 nm (&lt;0.03 W m−2sr−1). The binary classification algorithm is based on three criteria. The first criteria relied on the difference in magnitude between the MODIS normalized water‐leaving radiance (nLw) at the 859 and 678 nm wavebands. The magnitude of the nLw at the 555 and 645 nm wavebands relative to nLw 678 nm waveband formed the second and third criteria, respectively. The classification algorithm was tested on a small subset of 13 MODIS images with corresponding Trichodesmium sea‐truths and yielded an 85% accuracy. Fine‐scale features consistent with dense Trichodesmium surface aggregations, such as eddy swirls and windrows, appear to be well represented with the algorithm results. The algorithm was also found to be robust in the presence of highly reflective, potential confounding effects.</abstract><doi>10.4319/lom.2011.9.50</doi><tpages>17</tpages><oa>free_for_read</oa></addata></record>
fulltext fulltext
identifier ISSN: 1541-5856
ispartof Limnology and oceanography, methods, 2011-02, Vol.9 (2), p.50-66
issn 1541-5856
1541-5856
language eng
recordid cdi_proquest_miscellaneous_1780518613
source Wiley
subjects Cyanobacteria
Marine
title A simple, binary classification algorithm for the detection of Trichodesmium spp. within the Great Barrier Reef using MODIS imagery
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-29T19%3A10%3A33IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=A%20simple,%20binary%20classification%20algorithm%20for%20the%20detection%20of%20Trichodesmium%20spp.%20within%20the%20Great%20Barrier%20Reef%20using%20MODIS%20imagery&rft.jtitle=Limnology%20and%20oceanography,%20methods&rft.au=McKinna,%20Lachlan%20I.W.&rft.date=2011-02&rft.volume=9&rft.issue=2&rft.spage=50&rft.epage=66&rft.pages=50-66&rft.issn=1541-5856&rft.eissn=1541-5856&rft_id=info:doi/10.4319/lom.2011.9.50&rft_dat=%3Cproquest_cross%3E1780518613%3C/proquest_cross%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c4220-fddeef077dc3e573cd0ea9c4218e9b193336ac43a1ac9c15736af60815e033ee3%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=1780518613&rft_id=info:pmid/&rfr_iscdi=true