Corel PaintShop Pro X7, DE User's Guide download pdf (Page 207)

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Adjusting images 203

JPEG. Noise appears as colored specks within the photo. You can

display the noise best by zooming in. For example, you might see

specks of red, pink, green, and yellow in a photo of a clear blue sky.

Corel PaintShop Pro gives you many ways to remove various types of

noise, and it even lets you add noise to an otherwise “clean” photo.

You can make the following corrections by applying them to a selection

or an entire image:

• You can reduce the detail in an image and add a grainy texture. By

adding a small percentage of noise to an image, you can reduce

the appearance of small imperfections and scratches that cannot

be removed with other tools.

• You can find and eliminate small scratches that are either lighter

or darker than the surrounding area.

• You can remedy a common problem seen in video capture images

in which even- and odd-numbered scan lines are recorded at

different rates. The problem is usually noticed if the subject was

moving when the image was captured. Note that removing scan

lines may make noise more visible.

• You can restore a JPEG image to its original appearance. When

you save a file to the JPEG format from any software package

(such as scanning software), the file information is compressed to

create a smaller file. The compression may produce any of the

following artifacts: halos or color leakage beyond the edges of

objects, checkerboard patterns on smooth backgrounds, or blocky

areas.

• You can remove undesirable patterns from scanned images. This

problem sometimes occurs in scanned photographs printed on

textured paper.

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Corel PaintShop Pro X7, DE User's Guide Page 207

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