MLNMF: Multilayer Nonnegative Matrix Factorization
The reference paper:
R. Rajabi and H. Ghassemian, "Spectral Unmixing of Hyperspectral Imagery Using Multilayer NMF," in IEEE Geoscience and Remote Sensing Letters, vol. 12, no. 1, pp. 38-42, Jan. 2015, doi: 10.1109/LGRS.2014.2325874.
Can be downloaded from:
https://ieeexplore.ieee.org/abstract/document/6827210/
PDF: https://arxiv.org/pdf/1408.2810