Table 3 Average execution time for each proposed level with the respected image size
No | Level (image size) | Average execution time (s) |
|---|---|---|
1 | Contrast adjustment block (original size) | 0.68 |
2 | Cropping block (original size) | 0.15 |
3 | Get spine axis (512 by 512 to get the spine, then reduced 256 by 256 when using HT) | 0.29 |
4 | Segmentation using GD, thresholding and FCM | 13.71 |
|  |  - Estimate lung outline (GD) (512 by 512) | (9.79) |
|  |  - Fill the lung outline (thresholding) (256 by 256) | (0.96) |
|  |  - Refine lung region (FCM) (256 by 256) | (2.96) |