Table 1
Experimental parameters.
| Parameter | Value/Range |
|---|---|
| Gaussian pyramid layers | Floors 3–5 |
| Laplacian pyramid layers | Same number of layers as Gaussian pyramid |
| Direction filter group direction number | 8 directions |
| Feature point extraction window size | 5 × 5 pixels |
| Sliding window size | 5 × 5 pixels |
| Template size for calculating Babbitt coefficient threshold | 5 × 5 |
| Selection of dynamic threshold for Babbitt coefficient | Select the value at the maximum gradient as the threshold |
| Feature file storage format | Binary, Text |
| Display method of search results | Image list |
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