Liang Ma, Yutao Gou, Tao Lei, Lei Jin, Yixuan Song. Small object detection based on multi-scale feature fusion using remote sensing images[J]. Opto-Electronic Engineering, 2022, 49(4): 210363

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- Opto-Electronic Engineering
- Vol. 49, Issue 4, 210363 (2022)

Fig. 1. Complex background in remote sensing images

Fig. 2. Network framework

Fig. 3. Network structure

Fig. 4. Feature weighting method based on grouped convolution

Fig. 5. (a) Schematic diagram of convolutional network receptive field; (b) Object classification strategy based on receptive field

Fig. 6. Object scale distribution of the dataset

Fig. 7. Sample of plane and small-vehicle image of DOTA dataset used in the experiment. (a) Training set; (b) Testing set

Fig. 8. Objects cut and copy flow diagram

Fig. 9. The loss curve of the network trained on the DOTA plane training set

Fig. 10. The loss curve of the network trained on the DOTA small-vehicle training set

Fig. 11. Partial plane test results. Yellow circles represent false alarms and green circles represent missed detection.

Fig. 12. Partial small-vehicle test results. Yellow circles represent false alarms and green circles represent missed detection.

Fig. 13. Model convergence under different initial values of fusion factors
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Table 1. Parameters of different networks
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Table 2. Receptive field of feature map and corresponding object size parameters
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Table 3. Detection results of different feature fusion schemes
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Table 4. DOTA plane dataset test results under different network configurations
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Table 5. DOTA small-vehicle dataset test results under different network configurations
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Table 6. Test results of our dataset under different network configurations
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Table 7. Statistics of the distribution of each scale objects number
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Table 8. Influence of initial value of fusion factor on detection performance
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Table 9. Influence of CBAM and adaptive fusion module on detection performance
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Table 10. Comparison of detection performance of different methods
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Table 11. Performance of FPN module based on adaptive feature weighted fusion on Faster R-CNN

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