1. An auto-segmentation method comprising: performing atlas-based auto-segmentation (ABAS) on a plurality of points in a subject image using an atlas image to generate first data representative of a structure in the subject image; applying a plurality of points in the subject image to a learning-enhanced classifier to generate second data representative of the structure in the subject image; combining the first data with the second data to generate third data representative of the structure in the subject image; and wherein the method steps are performed by a processor.