Table 1.
Calculated MSE and SSIM for focused and defocused comparisons.
| Focused | Defocused | |||
|---|---|---|---|---|
| MSE (×10−3) | SSIM | MSE (×10−3) | SSIM | |
| R | 0.311 | 0.965 | 0.478 | 0.951 |
| G | 0.270 | 0.950 | 0.381 | 0.960 |
| B | 0.868 | 0.973 | 0.676 | 0.966 |
| B/W | 0.304 | 0.979 | 0.403 | 0.968 |
Grayscale images were calculated from truecolour RGB images (Fig. 2) with weighting factors of [0.2989, 0.5870, 0.1140] for [R, G, B] channels respectively and then gamma compressed, as described by Equation (A.1) of the Supplementary Information. The low MSE (<0.1%) and high SSIM metrics (>95%) indicate good agreement between theoretical predictions and experiment data.