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Accession Number:
AD0098766
Title:
Luminous and Spectral Reflectance as Well as Colors of Natural Objects (Albedo and Color of Terrain Features)
Corporate Author:
AIR FORCE CAMBRIDGE RESEARCH CENTER BEDFORD MA GEOPHYSICS RESEARCH DIV
Report Date:
1956-02-01
Abstract:
The spectral reflectance of natural objects is taken from Krinovs measurements. Based on these data, the luminous reflectance albedo and the color parameters are computed for these objects. The results are compared with other published data. It is shown that most natural objects possess a dominant wavelength between 5700A and 5900A, i.e. in the greenish yellow part of the spectrum. Even for vegetative formations, as seen from a distance, the dominant wavelength is also in the greenish yellow spectral range, which is a surprising fact because one would expect a dominant green. This color is, however, a mixture of brown and green. The excitation purity of bare areas and soils is low 15-30, but it is higher for vegetative formations 25-50. Vertical formations such as forests, seen from directly above, reflect only a very small amount 2-3 of the light which falls upon them from the sun and sky, but as seen from the ground their reflectance is much higher about 8.
Descriptive Note:
Research paper
Supplementary Note:
DOI: 10.21236/AD0098766
Pages:
0027
Distribution Statement:
Approved for public release; distribution is unlimited.
File Size:
1.83MB
