Canon CanoScan D660U User Manual page 15

3. Specify the percentage of sharpening you want in the Amount field.
4. Enter a number in the Radius field to specify the distance (in pixels) from an edge you want to
sharpen. A low number indicates sharpening close to the image edges, and a higher number
indicates sharpening farther away.
5. Enter a number in the Threshold field to specify the level at which pixels are sharpened.
6. Click OK to sharpen the image.
CanoScan Toolbox 15