Distributed Parallel Endmember Extraction of Hyperspectral Data Based on Spark

Table 1

Spectral angle distance comparison between the endmembers extracted by IEA from the AVIRIS Cuprite scene and the reference USGS mineral spectral signatures.

Mineral	SAD (in radians)
	Serial version	Parallel version
Alunite	0.0645	0.0645
Buddingtonite	0.0717	0.0717
Calcite	0.0898	0.0898
Kaolinite	0.0899	0.0899
Muscovite	0.0736	0.0736