Human skin
Non-negative matrix factorization
Epidermis (zoology)
Dermis
Matrix decomposition
Melasma
Absorption (acoustics)
Matrix (chemical analysis)
Computer science
Factorization
Chromophore
Algorithm
Biological system
Dermatology
Chemistry
Optics
Physics
Biology
Photochemistry
Anatomy
Chromatography
Medicine
Eigenvalues and eigenvectors
Genetics
Quantum mechanics
