Microtek ScanWizard EZ Reference Manual page 104

Using the Unsharp Masking:
From the settings window , click the Filter tool button, then choose Unsharp
Masking from the list of options.
1. Click the Filter tool button to open the AIC window . The Unsharp Masking
dialog box appears.
2. Enter a value in the Strength box to specify the degree of the filter' s effect.
The higher the value, the stronger the effect of the filter.
3. Select a mask size in the Mask Size box. This parameter determines the
depth of pixels that will be af f ected at the edge. Available selections are 3x3,
5x5, 7x7, 9x9, 11x11, and 13x13. For small, low-resolution image files, 3x3
is sufficient. For high-resolution, or large-scale image files, use 7x7.
4. Enter a value in the Threshold box. This option allows you to specify a
tolerance range to prevent overall sharpening that might generate noise or
cause other unexpected results. The Threshold defines the required image
of contrast between adjacent pixels before sharpening is applied to an edge.
A lower value produces a clearer effect.
5. The Light and Dark option control the sharpness effect to be applied to the
light and dark edges of the images, r e spectively. In general, doing too much
Unsharp Masking on light edges would make images seem unnatural, as the
human eye is sensitive in perceiving changes in bright areas of the image
beyond a certain threshold. If both values are 0, Unsharp Masking effect is
disabled.
6. Click OK to apply the settings.
64 Microtek ScanWizard EZ - Professional Mode Reference Manual
Before After 7x7 After 13x13