Canon IR2200, IR3300, IR2800 manual Digital Image Processing, Outline, F02-201-01

CHAPTER 2 MAIN CONTROLLER

2 Digital Image Processing

2.1 Outline

The machine’s digital image processing and image memory are controlled by the main controller PCB. The following is a block diagram of digital image processing:

Reader PG	Reader unit		Image data after
	8
			shading
Main controller unit
Enlargement/reduction
(main scanning direction)
	8
	Edge emphasis
	8
	Editing
	8
Intensity/density conversion
	(LOG conversion)
	8
Density conversion	Density adjustment
(LUT)	(F value conversion)
	8
	Density correction
	(γ conversion)
	8
Binary processing		Binary processing
(error diffusion method)		(dither screen method)
(text, text/photo, print photo)		(film photo)
	1	1
			Compression/de-compression,
			rotation, enlargement/reduction
	Image memory		SDRAM
	control
			I/O control
				HDD
Printer PG	1			Image server
Binary-binary processing density conversion
	1
	Smoothing
	4 or 2
	Printer unit

F02-201-01

COPYRIGHT © 2001 CANON INC. CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001 2-7 S