1. A digital printing method comprising the steps of: providing a known color gamut; measuring color density of the gamut using a standard densitometer and storing resulting color density standard values in a computer; sensing the gamut using an optical sensor assembly and storing a resulting first set of sensor values in the computer; using the computer to generate at least a four by four transformation matrix based upon the color density standard values and the first set of sensor values; printing a print test pattern on a printing substrate; optically sensing the print test pattern using the optical sensor assembly and storing a resulting second set of sensor values in the computer; using the computer and the transformation matrix to transform the second set of sensor values into a set of calibrated color density values of the test pattern; using the computer to generate a set of correction parameters based upon the set of calibrated color density values; processing a digital image using the computer and the set of correction parameters; and printing the processed digital image.