Corel PaintShop Pro X7, DE User's Guide Page 208

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204 Corel PaintShop Pro X7 User Guide
You can remove single-pixel specks that are mostly white or black.
The brightness of each pixel is analyzed and then compared to the
surrounding pixels to determine whether it should be removed.
You can remove noise in a photo without losing details in edges
within the photo. For example, you can preserve the edges of
facial features while correcting a blotchy complexion.
You can remove small random specks or areas of noise that are
distinctly different from the surrounding area. The intensity of
each pixel is adjusted to the median intensity of surrounding
pixels. (The median intensity is the middle value, not the average,)
in the range of values.) To preserve object edges, you can use the
Median Filter command. With this command, you can apply more
adjustment to a pixel that differs greatly from surrounding pixels
than to a pixel that is similar to surrounding pixels. You can specify
the number of surrounding pixels to use in the calculation. If you
choose a large number of pixels, more noise is removed, so more
detail is lost.
You can remove multipixel black or white specks, such as those
caused by dust on film or video.
You can remove noise or specks in an image while preserving
details in textures. For example, you can preserve textures in
clothing while removing noise from another area (such as a
person’s face).
In addition, you can use the One Step Noise Removal and the Digital
Noise Removal commands. For more information, see “To remove
digital noise quickly” on page 174 and “To use advanced options for
removing digital noise” on page 175.
To add noise
Edit workspace
1 Choose Adjust Add/Remove Noise Add Noise.
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