Detection and Identification Accuracy of PCA-Accelerated Real-Time
  Processing of Hyperspectral Imagery
Abigail Basener Meagan Herald
Real-time or near real-time hyperspectral detection and identification are
extremely useful and needed in many fields. These data sets can be quite large,
and the algorithms can require numerous computations that slow the process
down. A common way of speeding up the process is to use principal component
analysis (PCA) for dimension reduction. In the reduced dimensional space,
provided by a subset of the principal components, fewer computations are needed
to process the data resulting in a faster run time. In this paper, we propose a
way to further decrease the time required to use PCA by investigating how many
principal components may be omitted with minimal impact on the detection rate.
Using ACE to perform the detection, and then probability, and spectral fit for
identification, we find that the number of principal components can be reduced
by a substantial amount before seeing a noticeable change in detection rates.