Computational complexity 1 Correlation 1 Edge detection 1 Fast alignments 1 Feature extraction 1 Features extraction 1 High-resolution images 1 Image alignment 1 Image edge detection 1 Image resolution Image stitching 1 Invariant feature transforms 1 Scale invariant features 1 Scale-invariant feature transform 1 fast alignment 1 high-resolution image 1 image alignment 1 scale-invariant feature transform (SIFT) 1