**5. Conclusion**

**MOCKUPS**

**D65/ 10°** halogen 3000 K

LED 3000 K LED 2700 K LED 4000 K

Average Standard

1.0

1.7

1.5

1.0

1.5

1.5

0.6

0.8

1.1

0.7

0.8

1.3

deviation

**Table 2.**

Colorimetric coordinates (CIELAB 1976 colour space) of mockups reported in **Figure**

 **15**.

52.5

−21.6

−28.7

45.0

−22.2

−25.6

67.4

−20.2

−6.0

56.7

−23.2

−5.1

230 Fourier Transforms - High-tech Application and Current Trends

53.5

−19.2

−27.2

45.9

−20.1

−24.1

67.9

−19.0

−4.9

57.3

−22.0

−3.9

51.3

−21.8

−30.7

43.8

−22.4

−27.6

66.5

−20.8

−7.5

55.8

−23.8

−6.8

53.2

−22.0

−27.8

45.6

−22.6

−24.8

67.7

−20.2

−5.3

57.1

−23.3

−4.4

52.1

−23.3

−29.0

44.6

−23.7

−26.1

67.3

−20.6

−6.3

56.7

−23.5

−5.4

**L\***

**a\***

**Copper blue in PVAc**

**b\***

**L\***

**Copper blue in oil**

**a\***

**b\***

**L\***

**a\***

**Zirconium blue in PVAc**

**b\***

**L\***

**a\***

**b\***

**Zirconium blue in oil**

Hyperspectral imaging (HSI) based on a Fabry‐Perot interferometer showed to be a pow‐ erful technique of analysis in the field of cultural heritage, providing at the same time the artwork's image and the spectral behaviour of each pixel. This has evident advantage with respect to punctual analysis as fibre optics reflectance spectroscopy (FORS) in terms of time spending for pigment recognition. Nevertheless, the system performance in the identifica‐ tion of materials strictly depends on the wavelength range used for the analysis: aware of that, the most recent research is intended to enlarge the investigation range in order to study in imaging modality specific features in particular of organic materials. Further HSI applications were tested on the artworks at CCR for elaborating the images rendered with different light sources or illuminants, in order to enhance particular aspects of the materi‐ als, such as for highlighting the areas with pictorial retouching. The hyperspectral data were shown to be useful also for calculating colorimetric coordinates for different light sources permitting a better evaluation of the pictorial materials to use in the conservation treatment.
