User Guide

User Guide Neat Image
Copyright © 1999-2003 by ABSoft. All rights reserved.
13 20-Nov-03
optimum filter settings easier and faster. More information about this tool is available in the Variant
Selector subsection, page 28.
4.3.3. Adjust sharpening settings (optional
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The sharpening filter is designed to increase image sharpness without increasing the noise strength.
The values of the sharpening settings are relative to the device noise profile and the noise filter settings.
The default values of the sharpening settings should produce satisfactory results (when sharpening is
enabled for any of the channel components) but you are encouraged to vary the settings to find values
that produce the desired level of sharpness. Zero sharpening amounts will not sharpen the image at all.
The non-zero sharpening amounts will apply sharpening of the specified strength. Use sharpening
controls for different frequency components to sharpen fine, medium or large image details. Like with
any sharpening method, you need to balance the amounts to avoid oversharpening.
Use the preview when adjusting the sharpening settings.
To adjust sharpening settings
• Select color channels where sharpening should be applied
⇒ Use checkboxes in the Sharpening Settings box.
If the working color space is RGB, then all color channels
should typically be processed. If it is the YCrCb color
space (JPEG or Symmetric), then, usually, you do not
need to sharpen the Cr and Cb channels.
• Adjust sharpening amounts
⇒ Use the High, Mid and Low amount sliders in the Sharpening Settings box.
Specify how much sharpening should be applied to each frequency component of the image.
The standard sharpening settings used by many graphic editors are 100% for high frequency and
0% for medium and low frequencies (used by default).
• Use preview
⇒ Use the preview when adjusting the sharpening settings.
After you have made changes to the sharpening settings, do not forget to check the preview. Use the
preview on different parts of the image to get a better feeling for the results of sharpening.
4.3.4. Save the filter settings into a preset (optional)
To save filter settings for future use
⇒ Click
(the Save filter settings as preset… button, pink disk) in the Filter Preset box or
select the Profile | Save Filter Settings as Preset… menu item.
In the Save filter preset as dialog box, specify the name of the file to save the preset. The filter
presets are stored in *.nfp files.
Saved filter preset includes the noise filter and sharpening settings. By saving-opening a preset, you can
reproduce exactly the same filter settings later on. Also, you can exchange filter presets with other users
of Neat Image. Together, a device noise profile and a filter preset can be used to accurately reproduce
the filtration results.
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