Research Article
Postprocessing of Infrared Reflectography to Support the Study of a Painting: The Case of Vivarini's Polyptych
Table 1
Additional features provided by IR2 with respect to visible, and by PCA and NDI with respect to visible and IR2.
| Color | Additional features provided by | With respect to |
| Red | IR2, PC2, PC3, and NDI | Visible (RGB and PAN) | Purple | IR2, PC2, PC3, and NDI | Visible | Blue | NDI | Visible and IR2 | Orange | PC2 and NDI | Visible and IR2 | Green | PC3 and NDI | Visible and IR2 |
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