A color marking device including a control system for calibration of the
device based upon dynamic color balance control of an output image. The
system comprises a front end converter for converting an input signal
representative of a target image comprising a preselected color into a
device-dependent control signal in accordance with a device TRC, a color
marking device for outputting an output image in response to the control
signal, a sensor for measuring a parameter from the output image
representative of a color of the output image, and, a point-wise
controller for comparing the parameter with a corresponding parameter
from the target image and constructing adjusted controlled points for the
device TRC when the measured parameter and the corresponding parameter
vary by a preselected value, a color balance controller for constructing
an adjusted device TRC from the controlled points, whereby subsequently
generated output images are output with the adjusted device TRC and, more
accurately represent target input images.