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COPYRIGHT
©
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 3 IMAGE PROCESSING SYSTEM
3-6 R
3.2.4 Edge Gain Correction (ADF in use)
In stream reading with the ADF in use, the No. 1 mirror base is fixed in position. To
check for changes in the intensity of the scanning lamp, the edge gain correction plate (gray;
mounted at the edge of read position) is read, and a gain that enables the attainment of a
specific intensity is computed.
The result is used to correct the data which otherwise would be affected by changes in the
intensity of light.
F03-302-02
1 pixel
7450 pixels
Edge gain correction plate
Standard white plate (for shading)
Copyboard glass
Reading
glass
Main scanning
direction