Spectral library is a collection of hyperspectral imaging spectrometer under certain conditions, the measured reflectance spectra of various types of feature data. Spectral library in accurately interpreting remote sensing image information, quickly realized the feature match of the unknown, plays a vital role to improve remote sensing classification level. Since hyperspectral imaging spectrometer generated a huge amount of data, build database feature spectrum, the use of advanced computer technology to store, manage and analyze this information to improve the level of analysis and processing of remote sensing information and enable them to get efficient and reasonable application the only way, and to awareness, recognition and matching feature provides a basis.
https://wenku.baidu.com/view/c854a88305a1b0717fd5360cba1aa81145318f67.html
https://blog.csdn.net/yoyo_yolanda/article/details/61207176
Free open-source spectral database: https://spectralworkbench.org/