Method and apparatus for calibrating a pipelined color processing device

Apparatus for calibrating a color processing pipeline including at least one initial color processing unit, an intermediate color processing unit and a final color processing unit, the apparatus comprising:

• a comparison unit operative to generate first, second and third comparison outputs by respectively comparing first, second and third output representations of first, second and third reference color images, respectively, to first, second and third target representations of the first, second nd third reference color images, respectively, the first output representation being generated by processing a first input representation of the first reference color image using the final color processing unit;
• and
• a calibration unit operative to calibrate the final color processing unit in accordance with the first comparison output, to subsequently calibrate the intermediate color processing unit in accordance with the second comparison output, and to subsequently calibrate an initial color processing unit in accordance with the third calibration output,
• wherein the second output representation is generated by processing a second input representation of the second reference color image using the calibrated final color processing unit, and
• the third output representation is generated by processing a third input representation of the third reference color image using a pipeline comprising the calibrated intermediate and final color processing units.