Table 1.
Performance evaluations on normal brain fused images based on different methods.
| Metric | IHS | NSCT+FL | DWT | NSCT+PCNN | Proposed | |
|---|---|---|---|---|---|---|
| Set 1 | Standard deviation | 51.6141 | 55.2178 | 42.5312 | 57.1188 | 57.2258 |
| Mean gradient | 8.8561 | 8.714 | 6.2027 | 8.8568 | 8.8071 | |
| Spatial frequency | 33.5851 | 33.2324 | 22.0093 | 33.7566 | 33.6546 | |
| Information entropy | 2.6859 | 2.7565 | 3.0483 | 2.7729 | 3.0621 | |
| Set 2 | Standard deviation | 43.278 | 49.5989 | 43.0915 | 52.9246 | 53.1691 |
| Mean gradient | 6.686 | 6.6633 | 4.5622 | 6.5672 | 6.7489 | |
| Spatial frequency | 20.3855 | 19.9558 | 12.7416 | 19.8214 | 20.0956 | |
| Information entropy | 3.6325 | 3.9243 | 4.2501 | 3.8386 | 3.9424 | |
| Set 3 | Standard deviation | 50.0926 | 55.7124 | 47.4476 | 57.1246 | 57.1268 |
| Mean gradient | 6.2153 | 6.1775 | 4.1822 | 6.086 | 6.1796 | |
| Spatial frequency | 19.244 | 18.9682 | 12.0096 | 18.7269 | 18.7335 | |
| Information entropy | 3.6226 | 3.7122 | 4.0074 | 3.7139 | 3.7399 |