1. A fingerprint sensing apparatus, comprising: a fingerprint sensor system; and a control system capable of: receiving fingerprint sensor data from the fingerprint sensor system; determining fingerprint sensor data blocks for at least a portion of the fingerprint sensor data; calculating statistical variance values for fingerprint sensor data corresponding to each of the fingerprint sensor data blocks; and determining, according to the statistical variance values, whether an object is positioned proximate a portion of the fingerprint sensor system.