Spectral mapping with imaging spectrometers

摘要: A technique for producing maps from reflectance-mode shortwave infrared airborne imaging spectrometer data is described. The reflectance signatures of hydrothermal alteration minerals are identified by the location and relative depth absorption features in 2.2-micron region. sensitivity detection can be adjusted changing threshold criterion features. Correct classification rates quantified using image subtraction ground truth data, then optimized varying threshold. easily modified to identify other spectral features, such as emission 60 refs.