History of engineering & technology Technology: general issues anomaly detection band selection band selection (BS) classification constrained energy minimization (CEM) data fusion deep learning hyperspectral hyperspectral image hyperspectral image classification hyperspectral imagery hyperspectral imaging hyperspectral unmixing image fusion machine learning target detection 90° yaw imaging AHS AVIRIS Africa Digital techniques Dunhuang site FTIR Gram–Schmidt orthogonalization HyMap Image processing KSVD MWIR