Microtek ScanWizard Medi, Справочное руководство

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58 Microtek ScanWizard Medi Reference Manual
Blur/Blur More
The Blur filters eliminate noise in the parts of the image where significant color
transitions occur. These filters decrease the contrast between adjacent pixels,
making the image appear hazy and out of focus.
• Blur smooths out the transitions by lightening pixels next to the hard edges
of defined lines and shaded areas.
• Blur More produces an effect three or four times stronger than Blur.
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.
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.
Sharpen Low/Sharpen Medium/Sharpen High
The Sharpen filters do the opposite of the Blur filters and increase the contrast
of adjacent pixels, making images appear sharper and more focused.
The three sharpening filters (Sharpen Low, Sharpen Medium, and Sharpen High)
improve clarity. The Sharpen High filter has a greater sharpening effect than the
Sharpen Medium filter, which in turn has a greater sharpening effect than the
Sharpen Low filter.
Unsharp Masking
The Unsharp masking filter is used to adjust the contrast of edge detail, creating
the illusion of more image sharpness. This filter can be useful for refocusing an
image that has become blurry from interpolation or scanning, and it is an
essential tool for doing CMYK color separation. In general, Unsharp masking is
needed to render sharp color reproductions, especially when you wish to make
a large color reproduction from a small original.