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Coreldraw 12 The Official Guide.pdf
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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 402.

To remove small dust and scratch marks throughout an image

1Click Image ` Correction ` Dust and scratch.

2Move the following sliders:

Radius — lets you set the range of pixels used to produce the effect. Set the radius as low as possible to retain image detail.

Threshold — lets you set the amount of noise reduction. Set the threshold as

high as possible to retain image detail.

Corel PHOTO-PAINT: Retouching

399

You can remove small dust and scratch marks from an image by applying the

Dust and scratch filter.

To remove scratch marks from part of an image

1Define an editable area that includes the scratch marks.

2Click Image ` Correction ` Dust and scratch.

3Move the following sliders:

Radius — lets you set the range of pixels used to produce the effect. Set the

radius as low as possible to retain image detail.

Threshold — lets you set the amount of noise reduction. Set the threshold as high as possible to retain image detail.

You can remove scratches from specific areas by creating a mask around the scratches before applying the Dust and scratch filter. A dashed line or redtinted overlay indicates the presence of a mask.

400

CorelDRAW Graphics Suite 12 User Guide

You can use the Brush mask tool to define an editable area that includes the scratch mark. Choose a nib size that is wider than the scratch mark so you can brush over the scratch easily. For information about the Brush mask tool, see “To define an editable area by freehand” on page 415.

To remove imperfections from an image by blending textures and colors

1Open the Touch-up flyout , and click the Touch-up brush tool .

2Choose a nib from the Shape picker.

3Type a value in the Size box to specify the nib size.

4Choose a value from the Strength box to set the intensity of the effect.

5Dab the brush in the image window to apply the effect.

You can remove imperfections from an image by blending textures and colors using the Touch-up brush tool.

You can also

Apply the effect to the object and the

Click the Enable or disable merged source

background simultaneously

button.

 

 

Change the brush size

Hold down Shift while dragging in the

 

image window. Release the key when the nib

 

is the size you want.

 

 

Corel PHOTO-PAINT: Retouching

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