Digital Image Processing - Canon GP215 Service Manual

C. Digital Image Processing
1. Outline
The digital image processing block serves to process image signals from various functions boards. See
Figure 3-304 for a block diagram of various image processing functions:
Analog
processor
PCB
Area signal
generation
Synthesis
A
OCRE / IP Board
COPYRIGHT © 1996 CANON INC.
Total processing
. Reproduction ratio
. Slant
Shading
. Mirror image
correction
. Repeat
. Folding
Density
processing
CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
. Edge emphasis
. Smoothing
Image processor PCB
Binary
processing
D/A
conversion
Figure 3-304
3. OPERATIONS AND TIMING
. Negative/
positive reversal
A
. Framing
. Blanking
Laser driver
PCB
3–33