Image Processing; Outline(Ir105); Overview Of The Image Flow - Canon ImageRunner iR8500 Series Service Manual

Chapter 4

4.5 Image Processing

4.5.1 Outline(iR105)

iR105
The digital processing and controlling of image memory of the machine are performed by the main controller PCB. The following is a block diagram
showing its digital image processing:

4.5.2 Overview of the Image Flow

iR105i/iR105+ / iR9070 / iR8070
The following shows the flow of images in relation to the machine's functions:
4-18
Reader unit
8
Reader PG
Main controller block
Enlargement/reduction
(main scanning direction)
8
Edge emphasis
8
Edit processing
8
Intensity/density conversion
(LOG conversion)
8
Density conversion
Density adjustment
(LUT)
(F-value conversion)
8
Density correction
(γ conversion)
8
Binary processing
(error diffusing method; text,
text/photo, print/print photo)
1
Image memory
control
1
Printer PG
Binary-binary density
conversion
1
Smoothing
4 or 2
Thickening
4 or 2
Printer unit
Binary processing
(dither screen; film photo)
1
Compression/expansion,
rotation,
enlargement/reduction
SDRAM
I/O control
F-4-17
Image data
after shading
HDD
0006-9796
0008-2265