Research Article
Deep Learning Methods for Underwater Target Feature Extraction and Recognition
Table 3
Comparison of different pooling methods.
| Frame size | Pooling method | Number of ELM hidden layer nodes | Recognition rate (%) |
| 2176 | Maximum value | 40 | 92.88 | 2176 | Mean value | 40 | 90.80 | 2176 | Maximum value-mean value | 40 | 93.04 | 2176 | Mean value-maximum value | 40 | 91.65 |
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