Spectroscopy and Spectral Analysis, Volume. 31, Issue 11, 2940(2011)
Quantitative Estimation of CaO Content in Surface Rocks Using Hyperspectral Thermal Infrared Emissivity
The objective of the present paper is to study the quantitative relationship between the CaO content and the thermal infrared emissivity spectra. The surface spectral emissivity of 23 solid rocks samples were measured in the field and the first derivative of the spectral emissivity was also calculated. Multiple linear regression (MLR), principal component analysis (PCR) and partial least squares regression (PLSR) were modeled and the regression results were compared. The results show that there is a good relationship between CaO content and thermal emissivity spectra features; emissivities become lower when CaO content increases in the 10.3~13 mm region; the first derivative spectra have a better predictive ability compared to the original emissivity spectra.
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ZHANG Li-fu, ZHANG Xue-wen, HUANG Zhao-qiang, YANG Hang, ZHANG Fei-zhou. Quantitative Estimation of CaO Content in Surface Rocks Using Hyperspectral Thermal Infrared Emissivity[J]. Spectroscopy and Spectral Analysis, 2011, 31(11): 2940
Received: Jan. 11, 2011
Accepted: --
Published Online: Dec. 22, 2011
The Author Email: Li-fu ZHANG (zhanglf@irsa.ac.cn)