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Measurement evaluation of contrast, CII, and SNR for Figure 5.
| Method | Contrast | CII | SNR |
|---|---|---|---|
| Original image | 0.1140 | 1.0000 | |
| HE | 0.1232 | 1.5781 | 17.5618 |
| AHE | 0.0785 | 1.8958 | 4.5959 |
| Nonlinear method based on Laplace pyramid |
0.1254 | 1.8594 | 7.9491 |
| Wavelet method | 0.1205 | 2.6146 | 20.6979 |
| The proposed method | 0.2141 | 7.0373 | 14.6316 |
