Inspec keywords: learning (artificial intelligence); geophysical image processing; iterative methods; sparse matrices; image representation; image classification; hyperspectral imaging; remote sensing; feature extraction

Other keywords: sparsity measure; norm sparsity; remote sensing; pruned library; sparse inversion method; synthetic image datasets; sparse abundance matrix; parameter-free algorithm; library pruning; semiblind unmixing; highly coherent spectral library; abundance calculation task; computational efficiency; real image datasets; desirable sparsity properties; signal processing community; image endmembers; hyperspectral image; sparsity level; standard sparsity measures; library aided unmixing; application-specific spectral libraries; proficiency; abundance computation

Subjects: Linear algebra (numerical analysis); Knowledge engineering techniques; Geography and cartography computing; Other topics in statistics; Interpolation and function approximation (numerical analysis); Computer vision and image processing techniques; Interpolation and function approximation (numerical analysis); Linear algebra (numerical analysis); Image recognition; Other topics in Earth sciences; Other topics in statistics