An improved card scanner for imaging and decoding data contained in indicia such as bar codes on a side surface of an inserted card. The device features a double scanning method using an electronic imaging element and processor which turns off unnecessary power when not required and begins processing data as soon as one captured image is determined complete. This is accomplished through the use of a processor and software to determine if a complete image of the bar code on the inserted card has been captured and allowing immediate processing for data and removal of the card. Should the image of the bar code be incomplete, a second scan is conducted of the bar code as it is removed and a complete image formed from the second or combination of the two individual scans. The device can also be used to compare photographs scanned from a card with the digital photograph encoded in a two dimensional bar code and to display both photos for comparison.