Optimal Segmentation Scale Parameter, Feature Subset and Classification Algorithm for Geographic Object-Based Crop Recognition Using Multisource Satellite Imagery
| العنوان: | Optimal Segmentation Scale Parameter, Feature Subset and Classification Algorithm for Geographic Object-Based Crop Recognition Using Multisource Satellite Imagery |
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| المؤلفون: | Jingfeng Huang, Lamin R. Mansaray, Limin Wang, Lingbo Yang |
| المصدر: | Remote Sensing, Vol 11, Iss 5, p 514 (2019) Remote Sensing; Volume 11; Issue 5; Pages: 514 |
| بيانات النشر: | MDPI AG, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 010504 meteorology & atmospheric sciences, Computer science, GEOBIA, optimal segmentation scale parameter, iEnRFE, feature selection, multisource satellite data, crop recognition, Science, 0211 other engineering and technologies, Feature selection, 02 engineering and technology, 01 natural sciences, Information gain ratio, Segmentation, 021101 geological & geomatics engineering, 0105 earth and related environmental sciences, Image segmentation, Random forest, Support vector machine, Statistical classification, Feature (computer vision), General Earth and Planetary Sciences, Algorithm |
| الوصف: | Geographic object-based image analysis (GEOBIA) has been widely used in the remote sensing of agricultural crops. However, issues related to image segmentation, data redundancy and performance of different classification algorithms with GEOBIA have not been properly addressed in previous studies, thereby compromising the accuracy of subsequent thematic products. It is in this regard that the current study investigates the optimal scale parameter (SP) in multi-resolution segmentation, feature subset, and classification algorithm for use in GEOBIA based on multisource satellite imagery. For this purpose, a novel supervised optimal SP selection method was proposed based on information gain ratio, and was then compared with a preexisting unsupervised optimal SP selection method. Additionally, the recursive feature elimination (RFE) and enhanced RFE (EnRFE) algorithms were modified to generate an improved EnRFE (iEnRFE) algorithm, which was then compared with its precursors in the selection of optimal classification features. Based on the above, random forest (RF), gradient boosting decision tree (GBDT) and support vector machine (SVM) were applied to segmented objects for crop classification. The results indicated that the supervised optimal SP selection method is more suitable for application in heterogeneous land cover, whereas the unsupervised method proved more efficient as it does not require reference segmentation objects. The proposed iEnRFE method outperformed the preexisting EnRFE and RFE methods in optimal feature subset selection as it recorded the highest accuracy and less processing time. The RF, GBDT, and SVM algorithms achieved overall classification accuracies of 91.8%, 92.4%, and 90.5%, respectively. GBDT and RF recorded higher classification accuracies and utilized much less computational time than SVM and are, therefore, considered more suitable for crop classification requiring large numbers of image features. These results have shown that the proposed object-based crop classification scheme could provide a valuable reference for relevant applications of GEOBIA in crop recognition using multisource satellite imagery. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2072-4292 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be6b52074878bf66397ee22c0c51a235 http://www.mdpi.com/2072-4292/11/5/514 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....be6b52074878bf66397ee22c0c51a235 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20724292 |
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