Canon 1000S, Service Manual

Page: 91 / 840

COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
3-47
3. OPERATION AND TIMING
In reality, however, filters tend to pass light of
various wavelengths. In the case of the G filter,
excess B and R components are present while the
G component is not always adequate.
In this block, excess image components are
removed from the RGB image signals and the
shortage is compensated for so as to bring the
characteristics closer to the ideal characteristics.
Figure 3-319
f. Image Composition
In this block, two units of image data (RGB
signals) read by the scanner are integrated. Such
integration may be any of the following; for details,
see the User’s Manual:
• Patch integration
• Full integration
• Area integration
Figure 3-320
In the case of full integration, image A, which
has been read by the scanner first, is stored in the
image memory first and integrated with image B,
which has been read next. If image A is used as
the background and image A is specified as the
area, image A, which has been read first, is stored
in the image memory on the IP memory PCB and
processed on the ED board by the area data from
the control panel/editor and then integrated with
image B.
Figure 3-321
Degree of transmission by filter
500 400 600 700
100%
B G R
Excess B component
G component (shortage)
Excess R component
Image integration
Image from scanner
Image memory
R,G,B
R,G,B
R,G,B
Image A Image B
Images A + B
IP memory PCB
Image processor PCB
Image integration
Image from scanner
Reproduction
ratio/reduction processing
R,G,B R,G,B
R,G,B
R,G,B
Image A
Image B
Images A + B
Area data
Control panel/editor
IP memory PCB
ED board
Image processor PCB
Image memory