90° yaw imaging AHS AVIRIS Africa Dunhuang site Effect of stress on Gram–Schmidt orthogonalization History of engineering & technology HyMap KSVD Misiones Otsu’s method Plants Política Relaciones exteriores SVM Technology: general issues adaptive window agroforestry airborne laser scanning algebraic multigrid methods anomaly detection band expansion process (BEP) band grouping band selection band selection (BS) band subset selection (BSS) biodiversity class imbalance classification