1. A method comprising: obtaining a first set of information representing an artifact to a first degree of quality, obtaining a second set of information representing the artifact to a second degree of quality different from the first degree of quality; determining which of the first set of information and the second set of information represents the artifact to a higher degree of quality and which represents the artifact to a lesser degree of quality; and altering the set of information representing the artifact to a lesser degree of quality, based on the set of information representing the artifact to a higher degree of quality.