Service manual

CHAPTER 2
2 - 14
COPYRIGHT © 2000 CANON INC. CANOSCAN FB1210U REV.0 APR. 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
10-99
100
101-149
150
151-299
300
301-1200
10-149
150
151-299
300
301-1200
x
x
x
x
o
x
o
x
o
o
x
o
x
o
x
o
x
o
x
x
x
x
x
x
o
o
o
o
o
x
x
o
o
o
x
x
x
x
x
x
o
x
x
x
x
o
x
x
Gradation
Color
Grayscale
Resolution
(dpi)
Horizontal
scanning
interpolation
Vertical
scanning
interpolation
Descreen Averaging
D. Filter Processing
When converting resolution and scaling, the image quality tends to be reduced. To prevent
the image quality reduction, filter processing is performed according to the resolution. Filter
processing for this scanner includes horizontal scanning interpolation, vertical scanning
interpolation, descreen, and averaging. Table 2-2 shows the resolution for filter processing.
Table 2-2