1. Omnisift: scale invariant features in omnidirectional images;Arican,2010
2. Scale invariant feature transform on the sphere: theory and applications;Cruz-Moto;Int. J. Comput. Vis.,2012
3. Realizing Laplacian filter in discrete spherical image;Funaki,2012
4. Spherical diffusion for scale-invariant keypoint detection in wide-angle images;Hansen,2008
5. Scale-invariant feature on the sphere;Hansen,2007