1. A computer-readable medium comprising: computer-readable information representing parameters which represent at least a portion of a feature of an object as a geometric shape, the parameters determined by a computer executing the steps of: (a) a recognition method performed on a plurality of data values to determine parameters representing at least the portion of the feature of the object as an initial geometric shape, (b) eliminating data values having a distance from the initial geometric shape represented by the determined parameters greater than a first threshold, or (c) performing a regression analysis on the remaining data values to determine the parameters of the computer-readable information.