Auto Image Density Correction - Ricoh Aficio 480W Dolphin-C2 Service Manual

28 April 2005 SCANNER

6.2.7 AUTO IMAGE DENSITY CORRECTION

Contact Image Sensor (Center)
70 mm 70 mm
5 mm
Texture detection Area
B188D916.WMFF
Auto Image Density Correction corrects the background density.
The CIS reads the surface of the white platen roller and uses this reading (white
point =0) as a reference point for density correction.
Next, the CIS starts 5 mm from the leading edge and reads 70 mm to the left and
right of center to perform image density correction line by line.
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