Canon GP200 Service Manual page 99

4. Sharpness/Filter Processing
a. Sharpness/Filter Processing
In sharpness/filter processing, computations are performed so that a crisp or soft image may be
obtained as specified on the control panel.
Figure 3-328b shows the output level occurring as the result of selecting 'sharpness mode weak' for
the image data shown in Figure 3-328a.
In 'sharpness mode weak', the variations in the density of an image are smoothed out to generate a
soft image. (The effect may be used to make moire less conspicuous.)
Figure 3-328c shows the output level occurring when 'sharpness mode strong' is selected.
In 'sharpness mode strong', the variations in the density of an image are emphasized to generate a
crisp image.
Black 255
200
100
White 0
Figure 3-328b Sharpness Mode Weak
COPYRIGHT © 1996 CANON INC.
Download service manual and resetter printer at http://printer1.blogspot.com
Black 255
1 pixel
200
100
White 0
Figure 3-328a
Main scanning direction
After output
CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
Main scanning direction
After output
Black 255
200
100
White 0
Figure 3-328c Sharpness Mode Strong
3. OPERATIONS AND TIMING
Main scanning direction
After output
3–45