1. An apparatus for culling substantially redundant data in a fingerprint sensing circuit, the apparatus comprising: an input module configured to receive a first set of data samples from an array of fingerprint sensing elements and further configured to receive a second set of data samples from the array of fingerprint sensing elements, the second set being received after the first set; a storage module to store each of the first and second sets of data samples; a comparator module to calculate a difference between each data sample from the first set and a corresponding data sample from the second set to provide a plurality of difference values; and a determination module to count the number of difference values that exceed a difference limit and identify the second set of data samples as redundant in the event the number is less than a count limit.