Identifying a discriminative feature can effectively improve the classification performance of aerial scene classification. Deep convolutional neural networks (DCNN) have been widely used in aerial scene classification for its learning discriminative feature ability. The DCNN feature
can be more discriminative by optimizing the training loss function and using transfer learning methods. To enhance the discriminative power of a DCNN feature, the improved loss functions of pretraining models are combined with a softmax loss function and a centre loss function. To further
improve performance, in this article, we propose hybrid DCNN features for aerial scene classification. First, we use DCNN models with joint loss functions and transfer learning from pretrained deep DCNN models. Second, the dense DCNN features are extracted, and the discriminative hybrid features
are created using linear connection. Finally, an ensemble extreme learning machine (EELM) classifier is adopted for classification due to its general superiority and low computational cost. Experimental results based on the three public benchmark data sets demonstrate that the hybrid features
obtained using the proposed approach and classified by the EELM classifier can result in remarkable performance.
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Document Type: Research Article
College of Electronics and Information Engineering, Tongji University, Shanghai, China
College of Mathematics, Physics and Information Engineering, Jiaxing University, Zhejiang, China
Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai, China
Publication date: April 3, 2019
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