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High Pass Filter
The High Pass Filter sharpens the image by
passing high frequency information in the image. This is also
sometimes called a "crispening" filter. The degree of enhancement
ranges from 0% (no sharpening) to 100% (maximum sharpening) as
controlled by two properties: The Filter Type property changes the
size of the local neighborhood used to calculate the high-pass
value. The Strength property determines the proportion of sharpened
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 computed faster than the
Unsharp Mask but adds more noise. Use it for quick
crispening of image details.
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The High Pass Filter 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.
High Pass Filter
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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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Filter Type
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Specifies the type of pixel neighborhood to select
for calculating a sharpened value.
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Strength
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Controls the percentage of high-pass 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
Filtering Images
Unsharp Mask
Maximum Entropy Deconvolution
Mira Pro x64 8.83 User's Guide, Copyright Ⓒ 2026 Mirametrics, Inc.
All Rights Reserved.
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