{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,11]],"date-time":"2026-03-11T16:37:42Z","timestamp":1773247062553,"version":"3.50.1"},"reference-count":50,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2011,2,16]],"date-time":"2011-02-16T00:00:00Z","timestamp":1297814400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Japanese Knotweed s.l. taxa are amongst the most aggressive vascular plant Invasive Alien Species (IAS) in the world. These taxa form dense, suppressive monocultures and are persistent, pervasive invaders throughout the more economically developed countries (MEDCs) of the world. The current paper utilises the Object-Based Image Analysis (OBIA) approach of Definiens Imaging Developer software, in combination with very high spatial resolution (VHSR) colour infra-red (CIR) and visible\u2011band (RGB) aerial photography in order to detect Japanese Knotweed s.l. taxa in Wales (UK). An algorithm was created using Definiens in order to detect these taxa, using variables found to effectively distinguish them from landscape and vegetation features. The results of the detection algorithm were accurate, as confirmed by field validation and desk\u2011based studies. Further, these results may be incorporated into Geographical Information Systems (GIS) research as they are readily transferable as vector polygons (shapefiles). The successful detection results developed within the Definiens software should enable greater management and control efficacy. Further to this, the basic principles of the detection process could enable detection of these taxa worldwide, given the (relatively) limited technical requirements necessary to conduct further analyses.<\/jats:p>","DOI":"10.3390\/rs3020319","type":"journal-article","created":{"date-parts":[[2011,2,17]],"date-time":"2011-02-17T06:08:01Z","timestamp":1297922881000},"page":"319-342","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":37,"title":["Object-Based Image Analysis for Detection of Japanese Knotweed s.l. taxa (Polygonaceae) in Wales (UK)"],"prefix":"10.3390","volume":"3","author":[{"given":"Daniel","family":"Jones","sequence":"first","affiliation":[{"name":"Faculty of Health, Sport & Science (HESAS), University of Glamorgan, Pontypridd CF37 1DL, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stephen","family":"Pike","sequence":"additional","affiliation":[{"name":"Faculty of Health, Sport & Science (HESAS), University of Glamorgan, Pontypridd CF37 1DL, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Malcolm","family":"Thomas","sequence":"additional","affiliation":[{"name":"Faculty of Health, Sport & Science (HESAS), University of Glamorgan, Pontypridd CF37 1DL, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Denis","family":"Murphy","sequence":"additional","affiliation":[{"name":"Faculty of Health, Sport & Science (HESAS), University of Glamorgan, Pontypridd CF37 1DL, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2011,2,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"293","DOI":"10.1023\/B:BINV.0000005574.15074.66","article-title":"Human agency in biological invasions: Secondary releases foster naturalisation and population expansion of alien plant species","volume":"5","author":"Kowarik","year":"2003","journal-title":"Biol. Invasions"},{"key":"ref_2","first-page":"1","article-title":"Introduced species: A significant component of human-caused global change","volume":"21","author":"Vitousek","year":"1997","journal-title":"NZ J. Ecol."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"98","DOI":"10.1614\/IPSM-07-022.1","article-title":"Ecological genetics of plant invasion: What do we know?","volume":"1","author":"Ward","year":"2008","journal-title":"Invasive Plant Sci. Manag."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"409","DOI":"10.1191\/0309133306pp490pr","article-title":"Plant invasions: Merging the concepts of species invasiveness and community invasibility","volume":"30","author":"Richardson","year":"2006","journal-title":"Prog. Phys. Geog."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"73","DOI":"10.1111\/j.1365-2664.2008.01601.x","article-title":"Indirect effects of invasive species removal devastate World Heritage Island","volume":"46","author":"Bergstrom","year":"2009","journal-title":"J. App. Ecol."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"646","DOI":"10.1016\/j.biocon.2007.12.009","article-title":"Exotic invasive knotweeds (Fallopia spp.) negatively affect native plant and invertebrate assemblages in European riparian habitats","volume":"141","author":"Gerber","year":"2007","journal-title":"Biol. Cons."},{"key":"ref_7","unstructured":"Drake, J.A., and Mooney, H.A. (1989). Biological Invasions: A Global Perspective, John Wiley & Sons Ltd."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"494","DOI":"10.1126\/science.277.5325.494","article-title":"Human domination of Earth\u2019s ecosystems","volume":"277","author":"Vitousek","year":"1994","journal-title":"Science"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"13","DOI":"10.1016\/j.isprsjprs.2007.01.004","article-title":"Discrimination of blackberry (Rubus fruticosus sp. Agg.) using hyperspectral imagery in Kosciuszko National Park, NSW, Australia","volume":"62","author":"Dehaan","year":"2007","journal-title":"ISPRS J. Photogramm."},{"key":"ref_10","first-page":"229","article-title":"Biological invasion\u2014Global terror","volume":"94","author":"Reddy","year":"2008","journal-title":"Curr. Sci."},{"key":"ref_11","unstructured":"Ustin, S.L., DiPietro, D., Olmstead, K., Underwood, E., and Scheer, G.J. (2002, January 24\u201328). Hyperspectral Remote Sensing for Invasive Species Detection and Mapping. Proceedings of 2002 IEEE International Geoscience and Remote Sensing Symposium, Toronto, ON, Canada."},{"key":"ref_12","unstructured":"Joshi, C., de Leeuw, J., and van Duren, I.C. (2004, January 12\u201323). Remote Sensing and GIS Applications for Mapping and Spatial Modelling of Invasive Species. Proceedings of the XX ISPRS Congress: Geo-Imagery Bridging Continents, Istanbul, Turkey."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"887","DOI":"10.4141\/P05-170","article-title":"The biology of invasive alien plants in Canada. 5. Polygonum cuspidatum Sieb. & Zucc. [= Fallopia japonica (Houtt.) Ronse Decr.]","volume":"86","author":"Barney","year":"2006","journal-title":"Can. J. Plant Sci."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"959","DOI":"10.2307\/2261459","article-title":"Fallopia japonica (Houtt.) Ronse Decraene","volume":"82","author":"Beerling","year":"1994","journal-title":"J. Ecol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"347","DOI":"10.1023\/A:1016036916017","article-title":"Seasonal patterns of partitioning and remobilization of 14C in the invasive rhizomatous perennial Japanese knotweed (Fallopia japonica (Houtt.) Ronse Decraene)","volume":"15","author":"Price","year":"2002","journal-title":"Evol. Ecol."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1189","DOI":"10.1007\/s10530-008-9381-4","article-title":"Asexual spread versus sexual reproduction and evolution in Japanese Knotweed s.l. sets the stage for the \u201cBattle of the Clones\u201d","volume":"11","author":"Bailey","year":"2009","journal-title":"Biol. Invasions"},{"key":"ref_17","first-page":"798","article-title":"Taxonomic utility of palynological characters in the genus Fallopia, family polygonaceae from Pakistan","volume":"11","author":"Yasmin","year":"2009","journal-title":"Int. J. Agric. Biol."},{"key":"ref_18","first-page":"1573","article-title":"Genetic composition of invasive Japanese knotweed s.l. in the United States","volume":"12","author":"Grimsby","year":"2009","journal-title":"Biol. Invasions"},{"key":"ref_19","unstructured":"Lowe, S., Browne, M., Boudjelas, S., and Pooter, M.D. (2004). 100 of the World\u2019s Worst Invasive Alien Species: A Selection From the Global Invasive Species Database, United Nations (UN) Invasive Species Specialist Group (ISSG)."},{"key":"ref_20","first-page":"93","article-title":"Prize-winners to pariahs\u2014A history of Japanese Knotweed s.l. (Polygonaceae) in the British Isles","volume":"23","author":"Bailey","year":"2000","journal-title":"Watsonia"},{"key":"ref_21","first-page":"539","article-title":"Fallopia \u00d7 conollyana The Railway-yard Knotweed","volume":"23","author":"Bailey","year":"2001","journal-title":"Watsonia"},{"key":"ref_22","unstructured":"Stace, C. (1997). New Flora of the British Isles, Cambridge University Press. [2nd ed.]."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"584","DOI":"10.1614\/WS-09-069.1","article-title":"Review: Physiological approaches to the improvement of chemical control of Japanese Knotweed (Fallopia japonica)","volume":"57","author":"Bashtanova","year":"2009","journal-title":"Weed Sci."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"230","DOI":"10.2980\/1195-6860(2007)14[230:IBFJIT]2.0.CO;2","article-title":"Invasion by Fallopia japonica increases topsoil mineral nutrient concentrations","volume":"14","author":"Dassonville","year":"2007","journal-title":"Ecoscience"},{"key":"ref_25","unstructured":"Kabat, T. (2008). Are Japanese knotweed (Fallopia japonica) Control and Eradication Interventions Effective?, Centre for Evidence-Based Conservation (CEBC). Systematic Review No. 21."},{"key":"ref_26","first-page":"31","article-title":"Grasping at the routes of biological invasions: A framework for integrating pathways into policy","volume":"33","author":"Hulme","year":"2008","journal-title":"J. App. Ecol."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"636","DOI":"10.1126\/science.1169640","article-title":"Competition for light causes plant biodiversity loss after eutrophication","volume":"324","author":"Hautier","year":"2009","journal-title":"Science"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"2860","DOI":"10.3390\/s7112860","article-title":"Object-oriented classification and Ikonos multispectral imagery for mapping vegetation communities in urban areas","volume":"7","author":"Mathieu","year":"2007","journal-title":"Sensors"},{"key":"ref_29","unstructured":"Definiens (2008). Definiens Developer Version 7 User Guide, Definiens AG."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"463","DOI":"10.1109\/LGRS.2008.919622","article-title":"Improvement of image segmentation accuracy based on multiscale optimization procedure","volume":"5","author":"Esch","year":"2008","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"198","DOI":"10.1016\/j.rse.2004.07.011","article-title":"Object-oriented image analysis for mapping shrub encroachment from 1937 to 2003 in southern New Mexico","volume":"93","author":"Laliberte","year":"2004","journal-title":"Remote Sens. Environ."},{"key":"ref_32","unstructured":"Lang, S., and Blaschke, T. (2006, January 4\u20135). Bridging Remote Sensing and GIS\u2014What Are the Main Supportive Pillars?. Proceedings of the 1st International Conference on Object-based Image Analysis (OBIA 2006), Salzburg, Austria."},{"key":"ref_33","first-page":"2002","article-title":"A comparison of segmentation programs for high resolution remote sensing data","volume":"4","author":"Meinel","year":"2006","journal-title":"Development"},{"key":"ref_34","unstructured":"Jiang, N., Zhang, J.X., Li, H.T., and Lin, X.G. (2008, January 3\u201311). Object-Oriented Building Extraction by DSM and Very High-Resolution Orthoimages. Proceedings of XXIth ISPRS Congress: Silk Road for Information from Imagery, Beijing, China. Part B3b."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"239","DOI":"10.1016\/j.isprsjprs.2003.10.002","article-title":"Multi-resolution, object-oriented fuzzy analysis of remote sensing data for GIS-ready information","volume":"58","author":"Benz","year":"2004","journal-title":"ISPRS J. Photogramm."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"471","DOI":"10.1016\/S0034-4257(02)00135-9","article-title":"Monitoring vegetation phenology using MODIS","volume":"84","author":"Zhang","year":"2003","journal-title":"Remote Sens. Environ."},{"key":"ref_37","unstructured":"Mathieu, R., and Aryal, J. (2005, January 24\u201325). Object-Oriented Classification and Ikonos Multispectral Imagery for Mapping Vegetation Communities in Urban Areas. Proceedings of the SIRC 2005\u2014The 17th Annual Colloquium of the Spatial Information Research Centre University of Otago, Dunedin, New Zealand."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"616","DOI":"10.1016\/j.eswa.2006.01.055","article-title":"An automated satellite image classification design using object-oriented segmentation algorithms: A move towards standardization","volume":"32","author":"Gamanya","year":"2007","journal-title":"Expert Syst. Appl."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"165","DOI":"10.1016\/j.isprsjprs.2007.03.003","article-title":"Rule-based classification of multi-temporal satellite imagery for habitat and agricultural land cover mapping","volume":"62","author":"Lucas","year":"2007","journal-title":"ISPRS J. Photogramm."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"290","DOI":"10.1016\/j.rse.2006.11.021","article-title":"Analysis of time-series MODIS 250 m vegetation index data for crop classification in the US Central Great Plains","volume":"108","author":"Wardlow","year":"2007","journal-title":"Remote Sens. Environ."},{"key":"ref_41","first-page":"16","article-title":"Using Interpreted Large Scale Aerial Photo Data to Enhance Satellite-Based Mapping and Explore Forest Land Definitions","volume":"56","author":"McWilliams","year":"2009","journal-title":"Forest Inventory and Analysis (FIA) Symposium 2008; October 21-23, 2008; Park City, UT"},{"key":"ref_42","unstructured":"Herold, M., Scepan, J., M\u00fcller, A., and Gunther, S. (2002, January 4\u20136). Object-Oriented Mapping and Analysis of Urban Land Use\/Cover Using IKONOS Data. Proceedings of the 22nd EARSEL Symposium \u2018Geoinformation for European-Wide Integration\u2019, Prague, Czech."},{"key":"ref_43","unstructured":"EA (2008). The Knotweed Code of Practice."},{"key":"ref_44","unstructured":"McCoy, R.M. (2005). Field Methods in Remote Sensing, The Guildford Press."},{"key":"ref_45","unstructured":"Albrecht, F., Lang, S., and H\u00f6lbling, D. (July, January 29). Spatial Accuracy Assessment of Object Boundaries for Object-Based Image Analysis. Proceedings of Geographic Object-Based Image Analysis, Ghent, Belgium. Part 4\/C7."},{"key":"ref_46","unstructured":"Alberternst, B., and B\u00f6hmer, H.J. NOBANIS\u2014Invasive Alien Species Fact Sheet\u2014Fallopia japonica. Available online: www.nobanis.org."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1023\/A:1023299101998","article-title":"Experimental study of vegetative regeneration in four invasive Reynoutria taxa (Polygonaceae)","volume":"166","year":"2003","journal-title":"Plant Ecol."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"319","DOI":"10.1016\/j.jaridenv.2005.09.003","article-title":"An integrated framework for science-based arid land management","volume":"65","author":"Herrick","year":"2006","journal-title":"J. Arid Environ."},{"key":"ref_49","unstructured":"Edwards, C., and Taylor, S.L. (2008, January 11). Rhododendron Survey: Control Costs and Priority. Presented at Forest Research Technical Seminar, Argyll, Scotland."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"421","DOI":"10.1016\/j.ecolmodel.2006.08.004","article-title":"A simulation model of rhizome networks for Fallopia japonica (Japanese knotweed) in the United Kingdom","volume":"200","author":"Smith","year":"2007","journal-title":"Ecol. Model."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/3\/2\/319\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T21:55:15Z","timestamp":1760219715000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/3\/2\/319"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2011,2,16]]},"references-count":50,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2011,2]]}},"alternative-id":["rs3020319"],"URL":"https:\/\/doi.org\/10.3390\/rs3020319","relation":{},"ISSN":["2072-4292"],"issn-type":[{"value":"2072-4292","type":"electronic"}],"subject":[],"published":{"date-parts":[[2011,2,16]]}}}