1. A method for determining the shape (S t ) of an object represented in a current image, a plurality of landmarks being associated with said object, the method comprising: determining ( 202 ) a plurality of features (F t ) representative of said current image, said features being determined from at least a part of the plurality of landmarks, obtaining information representative of the shape (S t ) of the object by using at least one parameter (P t ) representative of an estimation of the pose of the object in the current image, said at least one parameter being obtained by implementing a multivariate regression applied to at least a part of said features (F t ).