Remove Moire on Scans
Images in print media represent a series of overlapping dots
that should create an illusion of more colors. When you scan such a photo you can
usually discover a moire pattern. A moire pattern results from incorrect
screen angles of overprinting halftones.
You can try to avoid moire at the scanning stage. Sometimes
a well-chosen scan angle can produce a remarkable effect. However, if you deal
with a scanned image you have only one method of the moire suppression at your disposal - apply image
processing techniques.
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Result |
On the photo below you can see a scan of a music CD cover.
Moire is visible.
Open this fragment of the scanned cover in AKVIS Noise Buster with the  button.
Noise Buster will process the image using
the Automatic Filtering preset from the list of presets. The
program will analyse the noise on the whole image, create histograms for the noise, and offer settings for the
parameters Noise Level and Smooth Level for
every noise type.
By default the parameter Fade is set to
75%. This means that a certain amount of original noise is mixed into the filtered
image. In most cases a bit of the original noise adds to the natural look of
an image. However, in this case, when the noise is not regularly spread over the
surface but represents visible squares, it's better to increase the value
of the parameter to 100%.
If the result in the preview area is good, press the  button to
apply the filtering to the whole image. Then save the image by pressing the  button.
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— Remove Moire on Scans