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Retouching

Corel PHOTO-PAINT lets you retouch images to improve their quality or modify their contents.

In this section, you’ll learn about

• improving scanned images

• removing red-eye

• removing dust and scratch marks

• cloning image areas

• sharpening images

• erasing image areas

• smearing, smudging, and blending colors

Improving scanned images

You can remove lines from scanned or interlaced video images. These lines can be filled with copies of adjacent  lines of pixels, or with colors derived from surrounding pixels. You can also remove moiré or noise. Moiré is the wave pattern produced when halftone screens of two different frequencies are superimposed on the same image. Noise is the speckled effect produced by scanning or video-capturing.

You can remove lines from a scanned image using the Deinterlace filter.

To improve scanned images

Remove moiré : Click Effects ` Noise ` Remove moiré, and specify the settings you want.

Remove noise : Click Effects ` Noise ` Remove noise, and specify the settings you want.

Remove lines : Click Image ` Transform ` Deinterlace.

Removing red-eye

You can remove the red-eye effect from the eyes of subjects in photos. Red-eye occurs when light from a flash reflects off the back of a person’s eye.

To remove red-eye

1 Open the Touch-up flyout , and click the Red-eye removal tool

2 Type a value in the Size box to match the brush size to the eye.

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3 Click the eye to remove the red pixels

Removing dust and scratch marks

Corel PHOTO-PAINT provides several different ways to improve the appearance of an image that has small dust and scratch marks. You can apply a filter to the entire image, or if an image has one or more scratches in a specific area, you can create a mask around the scratches and apply the filter to the editable areas.

The filter works by eliminating the contrast between pixels that exceed the contrast threshold you set. You can set a radius to determine how many pixels are affected by the changes. The settings you choose depend on the size of the blemish and the area surrounding it. For example, if you have a white scratch that is 1 or 2 pixels wide on a dark background, you can set a radius of 2 or 3 pixels and set the contrast threshold higher than if the same scratch was on a light background.

You can also remove imperfections, such as tears, scratch marks, and wrinkles, from an image by blending its textures and colors. Similar to using a filter, you choose the range of pixels necessary to retouch the image, depending on the size of the correction and the area surrounding it.

If the scratch or blemish is fairly large or in an area of the image that has a varied color and texture, such as leaves on a tree, you can achieve better results by cloning image areas. For information about cloning, see “Cloning image areas” on page 319.

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You can remove small dust and scratch marksfrom an imageby applying the Dust and scratch filter.