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. 2023 Jan 6;23(2):657. doi: 10.3390/s23020657
Algorithm 1. BgPCA

  1. Start {X: the 2D dataset of the HSI}

  2. Calculate the band-to-band NMI matrix to produce the subgroups of X

  3. Based on the NMI matrix, divide X into k subgroups

  4. For each subgroup, do

  5. Compute the projection matrix via PCA

  6. Combine all individual projection matrices successively to build the complete projection matrix