ATM is a generative model that performs deformable alignment between a template image and a test image with respect to a statistical parametric shape model. MenpoFit has several ATMs which differ in the manner that they compute the warp (thus represent the appearance features).
ATM HolisticATM MaskedATM LinearATM LinearMaskedATM PatchATM
LucasKanadeATMFitter
ForwardCompositional InverseCompositional