Table 5.
A comparison of the results of two active contour methods: (MAC) [8] and (GAC) [9] with the method presented in this study, based on mammograms from the DDSM database [31, 32]
| MAC | GAC | M | |
|---|---|---|---|
| Number of ROIs | 128 | 1000 | 200 |
| Size of ROI in pixels | 81 × 81 | From 20 × 20 to 41 × 41 | 512 × 512 |
| Mean OV: benign cases | – | 0.55 | 0.735 |
| Mean OV: malignant cases | – | 0.49 | 0.682 |
| Mean OV: malignant and benign cases | 0.61 | 0.52 | 0.708 |
| Mean time in seconds for a single ROI | – | – | 0.836 |
| Mean time in seconds for a single microcalcification | 0.42 | 0.4 | – |
The table compares the number of ROIs analyzed, their size in pixels, the mean values of the overlap value (OV) for benign and malignant cases, as well as for the benign and malignant cases together. The table also presents the mean time of executing the method in accordance with the adopted segmentation approach