A Matlab toolbox for visualization of image manifolds

While manifolds have attracted significant attention from the image processing and computer vision communities, we are not aware of openly available tools for visualization of manifold-modeled data that allows for interactive navigation over the embedded dataset. We introduce the Manifold Analysis GUI (MAGI), a freely available toolbox for Matlab that provides a navigation interface for manifold-modeled image datasets. The inputs to MAGI are a matrix of image data and a corresponding matrix of their embedding coordinates; the toolbox also includes an implementation of Isomap to provide a default nonlinear embedding. MAGI displays a 2-D projection of the embedding that can be navigated interactively, showing the image corresponding to the embedding point closest to the mouse cursor.