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.

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

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

2-10 S

COPYRIGHT © 2001 CANON INC.

CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001

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Canon IR2200, IR3300, IR2800 Output Image Processing, Smoothing, Binary-Binary Density Conversion read image output only
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