Digital Image Processing; Outline - Canon GP605 Service Manual

CHAPTER 4 IMAGE PROCESSING SYSTEM
III . DIGITAL IMAGE PROCESSING
A.

Outline

Digital image processing takes place on the following PCBs:
PCB
IP (image processor)
PCB
MFC (multi-function controller)
PCB
System motherboard
PDL board
Memory board (DRAM)
Image server
(hard disk)
4-6
COPYRIGHT © 1999 CANON INC.
[1] Digital Image Processing (for scanner input)
• Shading correction
• Enlargement/reduction (main scanning direction)
• Edge emphasis
• Binary processing
• AE processing (density correction curve)
• Negative/positive reversal
• Frame erasing
• Rotation
• Smoothing
[2] Compression/decompression
[3] Data transfer control
[1] Digital Image Processing (for PDL input)
• Enlargement/reduction (main/sub scanning direction)
[2] Data transfer control
Relays image signals.
Converts PDL data into a format that can be
processed by the copier.
Page Memory: 18 MB
(equivalent of 4 A4 originals; not compressed)
Stores image data that has been read in sequence.
2 GB (1,920 A4 originals; compressed)
Table 4-301 Related PCBs
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Description