COPYRIGHT© 2001 CANON INC.
2000 2000 2000 2000
CANON iR105 REV.0 JULY 2001
CHAPTER 3 MAIN CONTROLLER
3-8
2 Digital Image Processing
2.1 Outline
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 pro-
cessing:
F03-201-01 Block Diagram
8
Reader unit
Edit processing
Density conversion
(LUT)
Binary processing
(error diffusing method; text,
text/photo, print/print photo)
Image memory
control
Binary processing
(dither screen; film photo)
8
Density correction
(
γ
conversion)
8
8
8
Edge emphasis
1
Compression/expansion,
rotation,
enlargement/reduction
SDRAM
I/O control
HDD
4 or 2
Thickening
4 or 2
1
Smoothing
1
Binary-binary density
conversion
Printer unit
Printer PG
1
8
8
Main controller block
Density adjustment
(F-value conversion)
Intensity/density conversion
(LOG conversion)
Enlargement/reduction
(main scanning direction)
Reader PG
Image data
after shading
Summary of Contents for iR105 Series
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Page 1012: ...C 10 COPYRIGHT C 2001 CANON INC STANDARD FASTENERS REV 0 FEB 1992 ...
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