| 摘要 |
A method and apparatus for calibrating a color printer for improved color matching between an original input document and a color printed representation thereof Such a transformation involves a converting of data signals between color spaces wherein the original color space is usually a device-independent color space (CIE XYZ or Lab) and the output color space is device dependent to the printer (CMYK). The invention comprises transforming a first signal representative of an original document to a first intermediate signal in the device dependent color space where the transforming occurs by an inverse form of the transform. The first intermediate printer signal is then transformed back to the original color space by a forward transform of the transform. A difference between the second device-independent color space signal and the original color space signal is identified and is utilized as a feedback signal to adjust the original color signal by the difference for the generation of an adjusted original color space signal. The adjusted original color space signal is transformed by the inverse form of the transform to a printer signal for printing an improved and calibrated output from the printer.
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