Table 1.
TP and FP rates and P(error) of the SCT algorithm versus Otsu's method, the Isodata algorithm and MMT
| Noise | Method | FP rate | TP rate | P(error) |
|---|---|---|---|---|
| STD | SCT | 4.62 × 10−4 (5.44 × 10−4) | 9.56 × 10−1 (7.09 × 10−2) | 5.52 × 10−4 (4.89 × 10−4) |
| Otsu | 1.55 × 10−1 (5.64 × 10−2) | 9.96 × 10−1 (1.88 × 10−3) | 1.55 × 10−1 (5.64 × 10−2) | |
| MMT | 4.99 × 10−1 (3.55 × 10−2) | 1.00 (0.00) | 4.98 × 10−1 (3.55 × 10−2) | |
| Isodata | 2.43 × 10−1 (3.66 × 10−2) | 9.99 × 10−1 (1.08 × 10−3) | 2.43 × 10−1 (3.66 × 10−2) | |
| 2 × | SCT | 3.30 × 10−4 (2.51 × 10−4) | 9.46 × 10−1 (1.71 × 10−1) | 4.39 × 10−4 (4.41 × 10−4) |
| Otsu | 1.54 × 10−1 (4.72 × 10−2) | 9.79 × 10−1 (1.00 × 10−2) | 1.54 × 10−1 (4.72 × 10−2) | |
| MMT | 4.63 × 10−1 (3.26 × 10−2) | 1.00 (7.03 × 10−5) | 4.62 × 10−1 (3.62 × 10−2) | |
| Isodata | 1.73 × 10−1 (3.07 × 10−2) | 9.94 × 10−1 (7.90 × 10−3) | 1.73 × 10−1 (3.07 × 10−2) | |
| 3 × | SCT | 3.59 × 10−4 (2.33 × 10−4) | 8.94 × 10−1 (2.15 × 10−1) | 5.41 × 10−4 (3.96 × 10−4) |
| Otsu | 1.64 × 10−1 (3.83 × 10−2) | 9.64 × 10−1 (2.52 × 10−2) | 1.64 × 10−1 (3.83 × 10−2) | |
| MMT | 4.20 × 10−1 (3.08 × 10−2) | 1.00 (5.80 × 10−4) | 4.20 × 10−1 (3.08 × 10−2) | |
| Isodata | 1.51 × 10−1 (2.36 × 10−2) | 9.88 × 10−1 (1.77 × 10−2) | 1.50 × 10−1 (2.36 × 10−2) | |
| 5 × | SCT | 1.69 × 10−4 (1.44 × 10−4) | 6.98 × 10−1 (1.79 × 10−1) | 6.85 × 10−4 (4.09 × 10−4) |
| Otsu | 1.79 × 10−1 (1.78 × 10−2) | 9.61 × 10−1 (1.97 × 10−2) | 1.79 × 10−1 (1.77 × 10−2) | |
| MMT | 3.89 × 10−1 (2.75 × 10−2) | 9.82 × 10−1 (6.46 × 10−3) | 3.88 × 10−1 (2.75 × 10−2) | |
| Isodata | 1.41 × 10−1 (1.52 × 10−2) | 9.58 × 10−1 (2.03 × 10−2) | 1.40 × 10−1 (1.52 × 10−2) | |
| 10 × | SCT | 2.81 × 10−3 (6.54 × 10−3) | 4.68 × 10−1 (1.40 × 10−1) | 3.75 × 10−3 (6.39 × 10−3) |
| Otsu | 1.70 × 10−1 (1.25 × 10−2) | 8.05 × 10−1 (2.53 × 10−2) | 1.69 × 10−1 (1.25 × 10−2) | |
| MMT | 3.55 × 10−1 (2.30 × 10−2) | 8.57 × 10−1 (2.03 × 10−2) | 3.55 × 10−1 (2.30 × 10−2) | |
| Isodata | 1.32 × 10−1 (9.57 × 10−3) | 7.92 × 10−1 (2.59 × 10−2) | 1.32 × 10−1 (9.52 × 10−3) |
The FP rate is defined as the proportion of voxels in the image stack erroneously labeled as PML NB voxels when they are in fact background voxels. The TP rate is defined as the fraction of actual PML NB voxels correctly labeled as object. Standard deviations are shown within parentheses.