The inside of the scanner's cover showing the calibration area.
Dimensioned drawing of how the scanner sees the calibration area. The
dimensions are 1/300 inch (=300dpi).
A plot of a gray scan of the white calibration strip, made using the
driver's median and root mean square filter options. This data is
used to compensate for the brightness.
A plot of the same data as above showing the median and outlying
A plot of a calibration generated by the 20010602 release of the
driver, it has a median filter applied to the data from each point and
and hanning (smoothing) filter applied to the whole data set.