Fang Liu, Xin Wang, Lixia Lu, Guangwei Huang, Hongjuan Wang. Landform Image Classification Based on Sparse Coding and Convolutional Neural Network[J]. Acta Optica Sinica, 2019, 39(4): 0410001
- Acta Optica Sinica
- Vol. 39, Issue 4, 0410001 (2019)
Fig. 1. Dictionary visualization expression. (a) Example 1; (b) example 2
Fig. 2. Model based on SC and CNN
Fig. 3. Algorithm flowchart of landform scene classification based on SC and CNN
Fig. 4. Feature visualization of image blocks with size of 14×14 on two databases by using SC. (a) UAV landform database 3, before feature sorting; (b) UAV landform database 3, after feature sorting; (c) UC Merced LU database, before feature sorting (d) UC Merced LU database, after feature sorting
Fig. 5. Training convergence curves for UC Merced LU database. (a) Training convergence curves obtained with four different methods; (b) training convergence curves obtained with SC-CNN algorithm
Fig. 6. Confusion matrix obtained by classify landforms with SC-CNN algorithm SC-CNN
Fig. 7. Classification effect maps of complex landforms image. (a) Landform image; (b) artificial landform division; (c) post-blocking image; (d) landform classification effect map
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Table 1. Network structure of model based on SC and CNN
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Table 2. Classification accuracy of different algorithms on UC Merced LU database
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Table 3. Classification accuracy of existing methods on UAV landform database 3
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