Spatial location and ecological content of support vectors in an SVM classification of tropical vegetation
The Support Vector Machines (SVM) are increasingly far-reaching in remotely sensed data classification. As supervised classifiers, the SVM output depends on the input pixels, pointing out that training is potentially an important stage for optimizing classification accuracy. The SVM consist in proje...
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| Vydáno v: | Remote Sensing Letters Ročník 4; číslo 7; s. 686 - 695 |
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| Hlavní autoři: | , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
| Vydáno: |
Abingdon
Taylor & Francis
01.07.2013
Informa UK Limited Taylor & Francis Ltd Taylor and Francis |
| Témata: | |
| ISSN: | 2150-7058, 2150-704X, 2150-7058 |
| On-line přístup: | Získat plný text |
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| Shrnutí: | The Support Vector Machines (SVM) are increasingly far-reaching in remotely sensed data classification. As supervised classifiers, the SVM output depends on the input pixels, pointing out that training is potentially an important stage for optimizing classification accuracy. The SVM consist in projecting pixels into a high-dimensional feature space and then fitting in a hyperplane, maximizing the distance between the closest vectors and the hyperplane itself. This study aims to locate the pixels acting as support vectors and identify the ecological features they contain in a tropical vegetation context. The analyses focused on a Quickbird-2 image where two vegetation types occur. The physical boundary between classes was delineated in the field, and we used an iterative method to mark and localize the pixels acting as support vectors on the image. Our results highlight that vegetation sampling should focus on ecotones (the transition area between two different and adjacent vegetation classes) in order to minimize the field survey effort and maximize the mapping accuracy. |
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| Bibliografie: | http://dx.doi.org/10.1080/2150704X.2013.784848 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 ObjectType-Article-2 ObjectType-Feature-1 content type line 23 |
| ISSN: | 2150-7058 2150-704X 2150-7058 |
| DOI: | 10.1080/2150704x.2013.784848 |