1. A method for making a measurement comprising: (a) capturing a digital image, the captured digital image including a calibration pattern, the calibration pattern being square in shape, the calibration pattern including displayed encoded information arranged in a two dimensional pattern, the displayed encoded information directly providing calibration information about the calibration pattern that can be used directly in a calibration process; (b) reading the displayed encoded information to obtain the calibration information about the calibration pattern, where said displayed encoded information includes (1) a first square non-solid box at a first corner of said calibration pattern with a first solid box located within said first square non-solid box, (2) a second square non-solid box at a second corner of said calibration pattern with a second solid box located within said second square non-solid box, (3) a third square non-solid box at a third corner of said calibration pattern with a third solid box located within said third square non-solid box, where said displayed encoded information arranged in said two dimensional pattern relates to a size calibration information of said calibration target; and, (c) utilizing said size calibration information about the calibration pattern to make a calibrated measurement.