Algorithm research of building materials emissivity extracting

We all know that several methods were proposed to retrieve temperature and emissivity, among which the TES and ISSTES are better than the other methods. We use 40 man-made materials spectra from ASTER spectral library, and assess the stability and accuracy of these methods to MMD, MMR, ε_max input, and band number, respectively. The results show that the accuracy of TES method is connected with ε_min input, while ISSTES has nothing to do with ε_min; Using piecewise function to simulate the MMR or MMD relationship can improve the accuracy; Band number is an important factor for RMSE on temperature and emissivity, and 16-bands may be enough for ISSTES algorithm.