Reference algorithm implementations in OTB: textbook cases
Richard G. Baraniuk Chinmay Hegde Manifold Learning in the Wild A New Manifold Modeling and Learning Framework for Image Ensembles Aswin C. Sankaranarayanan.
Distinctive Image Features from Scale-Invariant Keypoints David Lowe Presented by Tony X. Han March 11, 2008.
Richard G. Baraniuk Chinmay Hegde