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CHAPTER 4 IMAGE PROCESSING SYSTEM
F.
Density Processing
1.
Outline
The digital image processing block performs the following density processing:
[1] LOG conversion
[2] Density correction
[3] AE processing
[4] Density adjustment
[5] Density adjustment during printing
Of the foregoing functions, 1. through 4. are performed when scanner input image data is being
read, and 5. is performed when printing scanner input image data/PDL input image data.
Multiple-value data
Density adjustment
when reading data
Density adjustment (F value table)
Density adjustment
Density adjustment (laser power/developing bias)
when printing data
4-12
COPYRIGHT © 2000 CANON INC.
Part 2>Chapter 3>2.4.1
Part 2>Chapter 3>2.4.4
Part 2>Chapter 3>2.5.2
Part 2>Chapter 3>2.4.3
Edge emphasis
AE processing (AE table)
LOG conversion (LOG table)
Density adjustment ( table)
Binary processing
Binary data
Figure 4-304 Flow of Density Processing
Identifies the type of original by
pre-scanning, and selects the best AE
table. (AE with priority on image quality)
Converts image signals possessing intensity
data representing reflected light into image
signals possessing data representing toner
density.
Selects an F value table to suit the Copy
Density key setting on the control panel.
Selects a
table to suit the text, text/photo,
or photo mode setting.
CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
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