Corel PaintShop Pro X7, DE User's Guide Page 219

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Adjusting images 215
curve. The blurring is dense in the centre and feathers at the
edges.
You can use a fixed exposure time to simulate taking a picture of a
moving object.
You can simulate a photo taken while spinning a camera in circles,
or while zooming in quickly at a very slow shutter speed.
Why would I blur an image on purpose?
You can use blurring commands to soften a selection or an image, to
retouch a photo, or to remove noise in an image. The Blur commands
smooth transitions and decrease contrast by averaging the pixels near
the edges and near areas of significant color transitions. You can apply
any of the Blur commands multiple times to the same image to
increase the blurring effect.
To apply blurring based on nearby pixel intensity
Edit workspace
1 Choose Adjust Blur Average.
The Average dialog box appears.
2 Type or set a value in the Filter aperture control.
Values range from 3 to 31 in odd-numbered increments. The
higher the value, the greater the blur.
3 Click OK.
To apply minimal blurring
Edit workspace
Choose Adjust Blur Blur.
To double the effect, choose the command again.
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