Manual Epson expression 1680 pro (page 60 of 147) (English)

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2-40 Understanding EPSON TWAIN Pro Features

Click the eyedropper button beneath the slider, and the mouse

pointer changes to an eyedropper. Move the eyedropper over the

previewed image, and click a dark area. The eyedropper “picks

up” the color from that area, and uses it as the shadow for the

entire image. Click Cancel to restore the original image.

For further information on using the Shadow setting to optimize

scanning, see “Making the Shadow setting” on page 1-3.

Threshold

Available only when Pixel Depth is set to Black & White and

Halftone is set to None in the Image Type dialog box. The scanner

scans gray shades as either black or white using this setting, and

is useful for optical character reading (OCR).

You can select from 0 (lightest) to 255 (darkest) by moving the

slider.

Tone Correction

Clicking the Tone Correction button opens the Tone

Correction dialog box. The settings described in this section allow

you to adjust the tonal relationship between the original image

and its reproduction on a monitor or printer.

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Epson expression 1680 pro Manual

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