Microtek ScanMaker 5 Guia do Utilizador Página 144

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6-66 Microtek ScanWizard 5
Brightness and Contrast tool
The Brightness and Contrast tool changes the brightness, contrast of the entire
image.
Brightness
The Brightness control lets you change the brightness setting. Too much
brightness can make an image look washed out.
Contrast
The Contrast control lets you change the contrast setting.
High contrast can make an image look like a photocopy of a picture with
little or no gray shades.
Low contrast can make an image look dull and flat.
Very low brightness levels can make an image look very dark.
Individual channel adjustment for brightness/contrast is not supported. For
RGB color image, the same effect applies to all channels. For Lab color image,
brightness and contrast applies to L (Lightness) channel only.
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