Canon Vizcam 1000, Service Manual

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COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
3-57
3. OPERATION AND TIMING
p. Filter Processing
In this block, computations are made so that a crisp or soft image may be obtained to suit the settings of
copying mode or sharpness mode selected on the control panel.
If image data shown in Figure 3-337 is input, the output level will be as shown in Figure 3-338 with
sharpness set to “weak.”
Setting sharpness to “weak” will smooth changes in the density of images, making the copy image soft.
And if image data shown in Figure 3-337 is input, the output level will be as shown Figure 3-339 with
sharpness set to “strong”.
Setting sharpness to “strong” will emphasize changes in the density of images, making the copy images
crisp.
Figure 3-337 Input Level
Figure 3-338 Sharpness Mode Set to Weak Figure 3-339 Sharpness Mode Set to Strong
Black 255
200
100
White 0
1 pixel
Main scanning direction
After output
200
100
Black 255
White 0
Main scanning direction
After output
Black 255
200
100
White 0
Main scanning direction
After output