1. A method of combining images of multiple resolutions to produce an enhanced active appearance model comprising: providing a plurality of images each having image landmarks and each image having an original resolution level; down-sampling the images into multiple scales of reduced resolution levels; and training an active appearance model for each reduced resolution level to create a multi-resolution active appearance model; wherein an enhancement technique is used to refine the image landmarks for training the active appearance model at original resolution levels, and wherein landmarks used for training the active appearance model for reduced resolution levels are obtained by scaling the landmarks used at the original resolution levels with a ratio in accordance with the multiple scales.