[sane-devel] CIS scanners: to calibrate or not to calibrate :) this is the question (my scanner is mad and lazy :)

litlle girl little.linux.girl at gmail.com
Sun Jun 29 18:13:59 UTC 2008

> I don't know what the gt68xx uses for calibration data,
> but the highly experimental genesys/calibration-cache code stores(in memory
> only) for each combination of color mode and resolution:
> * exposure time
> * AFE offset and gain
> * per pixel offset and gain(actually just the black/white levels, but the
> offset and gain are fully defined by those)

gt68xx uses for calibration data internal white and black marks inside
the scanner,
below the glas (at the -y positon of scanner head)


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