1. A method of improving a digital image captured by a digital camera comprising: providing a digital camera having a memory for storing known values of a color chart having a plurality of color patches of different colors and a digital image processor; using said digital camera to capture an image of said color chart to produce image values of said color patches of said color chart; operating said digital image processor to process at least some of said color patch imaged values and said stored known values of said color patches to produce a color correction matrix or profile; and storing said color correction matrix or profile to correct color images subsequently acquired by said digital camera.