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Generating region outlines from grayscale images using contour generation algorithms is one of the basic methods for image segmentation. The results can be used in 3D reconstruction from contours. The algorithm proposed in this paper which uses templates can effectively deal with the cases when contours pass through grid points and reach image boundaries.
Aiming at the high accuracy and speed requirements of images registration for multiband data or hyperspectral data, a new method which combines scale invariant feature transform (SIFT) with vegetation index analysis is put forward. Firstly, feature points extracted by SIFT algorithm are classified into two sets — points on vegetation area and points on non-vegetation area, which is based on vegetation...
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