1. A finger biometric sensor comprising: an array of finger biometric sensing pixels; and processing circuitry coupled to the array of finger biometric sensing pixels and capable of collecting an initial plurality of enrollment finger biometric data sets and generating an initial enrollment criteria based thereon, collecting at least one additional enrollment finger biometric data set and adapting the initial enrollment criteria based thereon to define an additional enrollment criteria, flagging the initial plurality of enrollment finger data set and the at least one additional enrollment finger data sets as sufficient if the additional enrollment criteria meets an acceptance condition, and collecting further enrollment finger biometric data and adapting the additional enrollment criteria if the additional enrollment criteria fails to meet the acceptance condition.