1. A feature detection method, said method comprising: accessing digital image data representing an object; accessing reference data including a shape model relating to shape variation from a baseline object, and a probabilistic atlas comprising probability for a feature in said baseline object; performing shape registration for said object by representing a shape of said object using said shape model, to obtain a registered shape; and determining probability for said feature in said object by generating a correspondence between a geometric element associated with said probabilistic atlas and a geometric element associated with said registered shape.