Natural Surface Images
A set of 247 natural surfaces consisting of leaves, petals and grass was randomly collected within the Derby region. The collection was carried out over four days and all the samples were collected in sunny days in May 2000. Two sides of each natural sample were measured using reflectance spectrophotometer to acquire spectral reflectance data between 400nm and 700nm at 10nm intervals. Thus 494 reflectance spectra data in total were obtained. All the samples were captured by a digital camera after measurement, you can 
the reflectance spectra data in excel format and also view the individual reflectance spectra by clicking the icons below.
sample 1
