Effects of changing illumination zenith on mineral spectra
Description
This data-set contains three sets of data: 1. Two ENVI spectral library files: One library contains all pure mineral spectra measured with changing illumination angles -Pure_mineral_spectra -Pure_mineral_spectra.hdr We name each spectrum in the pure mineral spectral libraries in this way: mineral name_zenith angle under which the spectrum is measured For instance, a spectrum of gypsum measured under a zenith angle of 55° is named: gypsum_55 Another library contains spectra linearly mixed from the pure mineral spectra -Mixed_spectra -Mixed_spectra.hdr We name each spectrum in the mixed mineral spectral library in this way: mixed_abbreviation of mineral name_zenith angle under which the spectrum is measured_spectral purity of the mineral spectrum The abbreviation for mineral names are: "vivi" for vivianite, "gyp" for gypsum, "mala" for malachite, "brx" for borax, "cal" for calcite, "kao" for kaolinite, "mont" for montmorillonite For instance, a mixed spectrum of kaolinite (spectral purity: 75%) measured under a zenith angle of 85° is named: mixed_kao_85_75 2. A pdf file named analysis results that contains all analysis results on variation of spectral feature position and absorption depth with decreasing illumination zenith angle and spectral mixing: -14 figures show the variation of spectral feature depth on the original spectral with changing zenith angle and spectral purity -14 figures show the variation of center wavelength position on the original spectral with changing zenith angle and spectral purity -14 figures show the variation of spectral feature depth on the continuum removed spectral with changing zenith angle and spectral purity -14 figures show the variation of center wavelength position on the continuum removed spectral with changing zenith angle and spectral purity -14 Tables that show magnitude of variation of feature parameters with decreasing zenith. The feature parameters are calculated based on the original spectra and the continuum removed spectra respectively. -70 rule number figures: We produced 70 rule figures to show the rule numbers from 2 classifiers when classifying the pure mineral spectra and mixed spectra. We namde each figure after a rule: classifier_rule_abbreviaiton of mineral name_spectral purity.
Files
Institutions
- Universiteit Twente