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Unsharp Mask
The Unsharp Mask sharpens the image by
removing blurred features of the image. The degree of enhancement
ranges from 0% (no sharpening) to 100% (maximum sharpening) as
controlled by two properties: The Sigma property determines the
size of blurred details to remove. The Blending property determines
the proportion of de-blurred image mixed with the original image.
In general, the stronger the enhancement, the greater the increase
in sharpness but also the greater the appearance of ringing
artifacts surrounding sharp features. This filter is slower than
the
High Pass Filter but generally gives superior results
by adding less noise to the final image.
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The Unsharp Mask command opens from the
Image Window > Process >
Filters menu and  button
on the Main Toolbar. The "immediate"
form, shown first, opens when an image or image set is displayed in
the top-most window. The general form can be used to select source
images from folders, windows, or by matching templates.
Unsharp Mask Properties
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Profile [|>]
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Selects the parameter profile for this command and
allows you to save or work with existing presets.
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[Select]
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Opens the
Select Source Images dialog to choose images from an
image window, folder, files, name template, or a Mira File
List.
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Sigma
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Specifies the sigma value of a Gaussian to
calculate the blurred version of the original image.
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Blending
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Controls the percentage of de-blurred image
blended with the original image to produce the final image.
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Source Region
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Specifies the rectangular region to be processed.
The options are as follows:
Entire image: The
entire image is processed.
Image Cursor: The
region to be processed is selected using the Image Cursor.
Rectangle: The
region specified by Min
andMax limits for Column and Row
coordinates is processed.
Column and Row, Min and
Max: When Rectangle is
selected, these values specify the column and row limits to be
processed.
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Related Topics
Spatial Filter Commands
High-Pass Filter
Maximum Entropy Deconvolution
Mira Pro x64 User's Guide, Copyright Ⓒ 2023 Mirametrics, Inc. All
Rights Reserved.
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