Table 4 Description of spectral datasets

CAVE⁸⁹

Contains diverse objects and materials; taken under CIE Standard Illuminant D65 illumination.

Harvard²²

Contains indoor and outdoor scenes; 50 were taken under daylight illumination, 25 under artificial and mixed illumination.

NUS²⁰

Contains outdoor images of natural objects, man-made objects, buildings; taken under artificial wideband lights of different color temperatures, illumination spectra is provided.

ICVL²¹

Contains urban, suburban, rural, indoor and plant-life scenes; taken under natural light.

KAIST³⁰

Contains color checkerboards with objects for network evaluation; use Xenon Illumination (Thorlab HPLS-30-4) as the light source.

Hyperspectral and color imaging⁹⁰

Contains 88 outdoor scenes, 57 fruits, 46 color charts and patches; taken under different lighting conditions, illumination data was provided.

Scyllarus⁹¹

Contains portraits, office scenes, close-ups, fruits and flowers, landscapes, each has around 15 images; office scenes were taken under fluorescent lighting, others under natural lighting.

C2H-Data⁹²

Contains various real and artificial fruits and vegetables; taken under Tungsten-bromine lamps.