Develop QC 2235 Plus Service Manual page 118

Image processing
6. The scanning are is divided into multiple blocks. The ratio of color or monochrome is
calculated for each of these blocks. The machine then determines whether the entire
original is colored or monochrome. A histogram of lightness is also created for later AE
processing.
7. R, G, and B data are then converted to value and color component data for adjust-
ments of saturation, lightness, and hue.
8. The scanning area is divided into two in the FD direction. The lightness histogram gen-
erated through ACS processing is tallied for each four gradation levels. A lightness his-
togram is then created for AE processing. The AE level of the original is determined
based on this histogram and AE processing is performed.
• The R, G, and B image data is transmitted to MFP Control Board on the Write Section
through the interface cable.
QC 2235plus Theory of Operation Ver.1.0 Feb. 2004
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