A trailer fairing for reducing aerodynamic drag from trailer landing gear andor wheel assembly is disclosed. Since the decoding direction is identical to the output direction of a printer, only a desired column of blocks of the decompressed image is temporarily stored for output and accordingly required memory size is relatively reduce. A model including multiple shape parameters is applied to the two independent eyes or subsets of features of each of the two eyes, andor to the lips or partial lips or one or more other mouth features and one or both eyes.