Canon IR3300, IR2800, IR2200 manual Edge Gain Correction ADF in use, F03-302-02

CHAPTER 3 IMAGE PROCESSING SYSTEM

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.

Edge gain correction plate

Reading glass

1 pixel

Copyboard glass

Main scanning direction

7450 pixels

Standard white plate (for shading)

F03-302-02

3-6 R COPYRIGHT © 2001 CANON INC. CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001