Removing dust and scratch marks from bitmaps in
Removing dust and
scratch marks from bitmaps
You can quickly
improve the appearance of a bitmap by removing dust and scratch marks. The dust
and scratch 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.
Process to remove dust and scratch
marks from a bitmap
remove dust and scratch marks from a bitmap
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.
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