A parameter determining part determines a parameter for an automatic image
correction in accordance with inputted images to be printed, and an
automatic image correcting part corrects the inputted images in accordance
with the determined parameter. Consequently, the printed images have
desirable qualities. The parameter determining part also determines
whether multiple images to be printed are a series of images or not in
accordance with additional information about the inputted images read by
an additional information reading part. If the parameter determining part
determines that the inputted images are the series of images, it fixes the
parameter for all of the inputted images. This prevents the printed images
from being different in color, gradation and gray balance.
