Microtek ScanWizard Industry Reference Manual page 44

C. Edge Enhancement
The Edge Enhancement filter gives greater contrast to edges. The filter can do
this because edges are areas in an image where gray or color levels change
abruptly. It is best to use this tool for improving geometrical contoured shapes.
D. Emboss
The Emboss filter makes a selection appear raised or stamped by suppressing
the color within the selection and then tracing its edges with black.
E. Gaussian Blur
The Gaussian Blur is used to defocus an area of the image where significant
color transitions occur or where noise exists, and the filter produces a hazy
effect. "Gaussian" refers to the bell-shaped curve that is generated when this
filter adjusts the color values of the affected pixels. The dialog box below
appears when you choose Gaussian Blur from the Filters menu.
Enter a value (0-255) in the Threshold edit
box (or drag the slider).
This parameter allows you to specify a
tolerance range or a field of contrast
between adjacent pixels before blurring is
applied. Blurring is applied only when pixel
differences are below the Threshold value.
The smaller the Threshold value, the weaker
the blurring effect.
40 ScanWizard Industry Reference Manual
Select a mask size from the Mask
Size list box.
This parameter determines the depth
of the surrounding pixels that will be
affected. The larger the mask size,
the stronger the blurring effect of
the filter.
Enter a value (1-10) in the Strength
edit box (or drag the slider).
This parameter specifies the degree
of the filter's effect. The higher the
value, the stronger the blurring
effect of the filter.