Epson Expression 800 TWAIN Pro Guide de l'utilisateur télécharger pdf (Page 41)

Advanced Scanning Page 41

The Image Controls settings are described in the table below.

* The Threshold setting is available only when the Pixel Depth setting is set to

Black & White

and the Halftone setting is set to

None

. When the Threshold

setting is active, the rest of the Image Controls are not available.

Image Controls settings Description

Exposure Select the intensity of light in the image as

determined by a combination of the

Highlight and Shadow settings from –10

(darkest) to 20 (brightest)

Gamma Select the amount of contrast in your

image from 50 (lowest) to 500 (highest)

Highlight Select the amount of detail visible in

the brightest areas of the image from 61

(lightest) to 490 (darkest)

Shadow Select the amount of detail visible in

the darkest areas of your image from 0

(lightest) to 60 (darkest)

Threshold* Select the point at which the gray areas in

the image are scanned as either black or

white from 0 (darkest) to 255 (lightest)

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Epson Expression 800 TWAIN Pro Guide de l'utilisateur Page 41