Oversized image registration based on SIFT algorithm
Xiaoxian Huang · Modern Electronics Technique · 2013
SIFT algorithm has a good matching performance under the conditions of affine transformation,noise and certain illumination.Since imaging size of the broadband camera on satellite is always oversized,if the oversized image is directly handled with SIFT algorithm,a big space will be occupied and a long computing time will be spended when building a Gaussian pyramid.By going into the affine transformation matrix,a method of calculating the matching coefficient between the downsample images of oversized images to indirectly get the matching coefficient of the oversized images is proposed.The experimental result indicates that this method is feasible.As for the image registration,it has a certain guiding significance for saving the computation time by reducing space occupation.