Microtek ScanMaker 5 User's Guide download pdf (Page 198)

Basic Concepts E-11

Image Correction

Several tools are available with your scanning software for adjusting the color

and quality of images.

Brightness, Contrast

This tool changes the brightness and contrast of the entire image. An image with

high contrast has less gray shades between black and white and appears to have

less visible detail. On the other hand, an image with low contrast has more gray

shades, has more visible detail, yet tends to look flat. Contrast determines the

number of shades you get; brightness determines the intensity of those shades.

Contrast increased Contrast decreased

Original Brightness increased Brightness decreased

White and Black points

This tool lets you adjust the shadow (darkest) and highlight (whitest) areas of an

image, allowing you to select a new shadow point to become the darkest value,

or a new highlight point to become the lightest value. The effect of this is to

bring out more visible detail in an image, especially if it has only a limited range

of grays or colors.

Original Black

emphasized

White

emphasized

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Microtek ScanMaker 5 User's Guide Page 198