Canon MultiPASS F20 Software User's Manual page 113

In the Sharpen dialog box, the original image appears on the left. As
you modify the image, you can see the results on the right.
Images appear with a sharpen value of 50. Because the modified
image cannot be made less sharp than the original, specifying a
sharpen value of less than 50 does not affect the modified image.
2. Move the slider to the left to sharpen less, to the right to sharpen
more. Or, specify a value in the Amount box.
When you sharpen an image, you increase the difference between color
values of adjacent pixels, sharpening the appearance of a color.
To remove noise (despeckle) from an image (Truecolor image type):
On the toolbar or Filter menu, click Despeckle.
When you despeckle an image, you remove image noise while preserving
detail. Despeckle removes noise by detecting the edges in an image and
blurring all of the selection except those edges.
To reduce the redeye effect (Truecolor image type):
1. On the toolbar or Filter menu, click Redeye Reduction.
Chapter 5 Viewing and Enhancing Images 109