Output Image Processing; Smoothing; Binary-Binary Density Conversion (Read Image Output Only) - Canon iR2200 Service Manual

CHAPTER 2 MAIN CONTROLLER

2.4 Output Image Processing

The output image data to the printer unit is subjected to the following processing:

2.4.1 Smoothing

a. When Generating Read Images
In the case of text or test/photo mode, the input image of 600×600 dpi is converted into
1200*×600 dpi by means of smoothing.
*Equivalent.
In smoothing, image data is compared against a template consisting of several combina-
tions of pattern matrixes for replacement of selected pixels.
In addition, notch processing is also executed at the same time as a pattern unique to read
image.
b. When Generating Printer (PDL) Images
The image data is subjected to the type of smoothing best suited to PDL, in which
600×600 dpi is converted into 2400*×600 dpi.
*Equivalent.

2.4.2 Binary-Binary Density Conversion (read image output only)

This processing is used as an auxiliary means for adjusting the density of images.
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