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This paper developed an approach to determine optimal parameters, C and s, for support vector domain description (SVDD) model to map specific land cover from integrating of training and window-based validation sets (WVS-SVDD). The validation set based on window-based approach made a tighten hypersphere because of compact constraint by the outlier pixels which were located closely to the target class in the feature space. The target land coves of wheat and bare land were considered to test the proposed method's performance. The overall accuracy for wheat reached as high as 94.37%. However, the underestimation of wheat, only 71.12% of the user's accuracy, attributed to the validation set covering a small portion of wheat spectra. The larger window sizes were tested to achieve more wheat pixels' samples for validation set. The results showed that wheat accuracy were improved along with window size increasing and the overall accuracies were higher than 88% The bare land as more heterogeneous land cover against wheat was selected to analyze the applicability and suitability of WVS-SVDD, SVDD classification was conducted and compared to the support vector machine (SVM) method as benchmark. The producer's and user's accuracies for bare land were over 80% at 2.4-m resolution scale and the overall accuracies were similar to those produced by the SVM at coarser spatial resolutions, highlighting the applicability of WVS-SVDD. Therefore, the developed method showed its advantages using the optimal parameters, C and s, for mapping homogeneous wheat and heterogeneous bare land, which exhibits great potentials to achieve highly accurate specific land cover. © 2017 IEEE.
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International Geoscience and Remote Sensing Symposium (IGARSS)
Year: 2017
Volume: 2017-July
Page: 4774-4777
Language: English
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 7
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