Research Article
Complex Background Removal Method for Video of an Inclined Cable Based on UAV Detection of Structural Vibration Frequencies
Table 4
Detected vibration frequencies (unit: Hz).
| | Condition | Method | Mode 1 | Mode 2 | Mode 3 | Mode 4 | Mode 5 | Mode 6 |
| | Short-time condition | Accelerometer | — | 1.4553 | 2.1662 | 2.8966 | 3.6242 | 4.3518 | | K-Means | — | 1.4486 | 2.1479 | 2.8472 | — | — | | Region Growing | — | 1.4467 | 2.1452 | 2.8685 | — | — | | RGv2 | | 1.4480 | 2.1470 | 2.8709 | 3.5949 | 4.3189 |
| | Long-time condition | Accelerometer | — | 1.4570 | 2.1680 | 2.8952 | 3.6250 | 4.3522 | | K-Means | — | 1.4326 | 2.1599 | 2.8684 | 3.5863 | 4.3073 | | Region Growing | — | 1.4326 | 2.1537 | 2.8653 | — | — | | RGv2 | | 1.4318 | 2.1477 | 2.8664 | 3.5878 | 4.3064 |
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