Epson Expression 1600 Guia do Utilizador descarregar pdf (Página 59)

2-28

Understanding EPSON TWAIN Pro Features

R4C0910

long.bk Rev. C

A5 size TWAIN.FM

1/12/00 Pass 2

Proof Sign-off:

M.Fujimori _______

J.Hoadley _______

Note:

❏

The Image Controls button appears dimmed and is not available

when

TET

(Text Enhancement Technology) is selected in the Image

Type dialog box.

❏

The Image Controls settings are optimized automatically when you

scan without previewing.

❏

If Pixel Depth is set to

Black & White

and Halftone is set to

None

in the Image Type dialog box, all the settings except Threshold

appear dimmed and cannot be selected.

❏

You can see the effects of the Image Controls settings in the Preview

window.

Exposure:

The Exposure setting lightens or darkens an image. You can

select from -10 (darkest) to 20 (brightest) by moving (clicking

and dragging) the slider.

The Exposure and Highlight controls are related. When the

Exposure setting is changed, the Highlight value is

automatically set.

Gamma:

The Gamma control allows you to adjust the mid-tones in an

image. You can select from 50 (darkest) to 500 (brightest) by

moving the slider.

Highlight:

The Highlight control allows you to adjust the brightness

level of the brightest parts of an image. You can select from

61 to 490 by moving the slider.

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