1. An apparatus for electronically capturing images, comprising: an imaging device; a focus control element coupled to the imaging device; a processor coupled to the imaging device and the focus control element; memory coupled to the computer processor and configured for retaining images captured from the imaging device and for retaining programming executable by the computer processor; and programming executable by the computer processor for carrying out steps comprising: capturing a plurality of object images; calculating sets of matching errors and blur difference estimations relating to the images; calculating a confidence indicator as a function of either the matching errors or blur difference estimations; and automatically adjusting the focus control element in response to said confidence indicator exceeding a threshold value.