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Semisupervised Neural Networks for Efficient Hyperspectral ImageClassification

Semisupervised Neural Networks for Efficient Hyperspectral ImageClassification,10.1109/TGRS.2009.2037898,IEEE Transactions on Geoscience and Remote Se

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Semisupervised Neural Networks for Efficient Hyperspectral ImageClassification   (Citations: 5)
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A framework for semisupervised remote sensing image classification based on neural networks is presented. The methodology consists of adding a flexible embedding regularizer to the loss function used for training neural networks. Training is done using stochastic gradient descent with additional balancing constraints to avoid falling into local minima. The method constitutes a generalization of both supervised and unsupervised methods and can handle millions of unlabeled samples. Therefore, the proposed approach gives rise to an operational classifier, as opposed to previously presented transductive or Laplacian support vector machines (TSVM or LapSVM, respectively). The proposed methodology constitutes a general framework for building computationally efficient semisupervised methods. The method is compared with LapSVM and TSVM in semisupervised scenarios, to SVM in supervised settings, and to online and batch k-means for unsupervised learning. Results demonstrate the improved classification accuracy and scalability of this approach on several hyperspectral image classification problems.
Journal: IEEE Transactions on Geoscience and Remote Sensing - IEEE TRANS GEOSCI REMOT SEN , vol. 48, no. 5, pp. 2271-2282, 2010
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