Research Article
An Improved Object Detection Method for Underwater Sonar Image Based on PP-YOLOv2
Table 1
Eight object categories and their numbers of images and objects in forward sonar data.
(a) Object information in training data |
| Object category | Number of objects | Number of images |
| Ball | 1943 | 1941 | Circle cage | 386 | 383 | Cube | 1752 | 1749 | Cylinder | 402 | 401 | Human body | 684 | 683 | Metal bucket | 403 | 402 | Square cage | 655 | 655 | Tyre | 852 | 850 | Total | 7077 | 4000 |
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(b) Object information in test data |
| Object category | Number of objects | Number of images |
| Ball | 595 | 595 | Circle cage | 86 | 86 | Cube | 424 | 423 | Cylinder | 39 | 39 | Human body | 379 | 379 | Metal bucket | 44 | 43 | Square cage | 169 | 169 | Tyre | 108 | 108 | Total | 1844 | 1000 |
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