Canon MultiPASS L6000 Software Manual page 197

Removing Scanner Noise
You can remove distortions associated with scanned images, such as color
bands and streaks.
1. Select the area of the image where the scanner noise appears.
2. On the Adjust menu, point to Advanced, and then click Remove
Scanner Noise.
3. In the Remove Scanner Noise dialog box, select Vertical or
Horizontal according to the direction of the streaks or bands.
4. Drag the Width slider according to the width of the noise. The slider
ranges from 2 pixels (far left) to 20 pixels (far right).
5. Drag the Detail slider according to the brightness of the noise. Move
the slider to the left for darker noise, to the right for brighter noise.
6. Drag the Removal slider to the left to remove less noise, to the right
to remove more noise.
As you drag the Removal slider, your changes appear in the Current
thumbnail. You can compare the changes to the Original thumbnail.
Chapter 7 Working with Documents in the Desktop Manager 7-53