An Adaptive Weighted Least Squares Approach for Colorimetric Scanner Calibration

L. Mendes and P. Carvalho (Portugal)


Colorimetric calibration, weighted least squares, polyno mial approximation.


Different methods exist to convert device dependent colour space into device independent colour space representations. In this paper a new polynomial based method for colori metric calibration of flatbed scanner is proposed. In this method an adaptive weighted least squares approach is fol lowed in order to control maximum allowable approxima tion errors. The performance of the proposed method is compared with two other polynomial methods. The evalua tion of these results with limited calibration data-sets is also compared. The maximum approximation errors achieved by the proposed method are smaller. This method can be used in automatic visual inspection or in high quality colour reproduction applications.

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