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Understanding EPSON TWAIN Pro Features / Using the EPSON TWAIN Pro Main Dialog Box

Selecting an Image Type

Image Type list
Image Type button

Use the Image Type list to select from a variety of predefined and user-defined settings, or use the Image Type button to make detailed changes to settings and to save custom settings.

Image Type list

The Image Type list provides the predefined settings described below. There is a predefined setting to suit most image types, so EPSON recommends using the predefined settings first. If you later want to make fine adjustments to the Image Type setting, use the Image Type button. See Image Type button for details.

24-bit Color (Std)

24-bit colors, high quality output when scanning colored documents

24-bit Color De-screening

24-bit colors, high quality with de-screening to remove moiré patterns

Note:

A moiré is a cross-hatch pattern that appears on scanned images when scanning printed material. It is a result of interference that occurs due to the difference between the pitches of the scanning and the halftone screens.

8-bit Gray (Std)

256 grays, high quality, and de-screening is selectable (default is no de-screening)

Line Art

Black and white, draft quality

OCR

Black and white, best quality

Copy & Fax

Black and white, hard halftone, draft quality, Auto Area Segmentation

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Image Type button

The Image Type button opens the Image Type dialog box, where you can customize the Image Type settings described in this section.

To save the settings you made as a group of custom settings, type a new name in the Image Type Name box, then click Save. To delete a custom Image Type setting, select the setting name then click Delete.

To apply the settings you made, click OK. You can see the effects of all settings except B/W Option in the Preview window. Click the Preview button in the main dialog box to open this window.

Image Type Name

The names of predefined settings and any custom settings you have saved appear in the Image Type Name list.

Pixel Depth

Select the pixel depth from:
24-bit Color, 8-bit Gray, and Black & White.

Note:

The Pixel Depth setting determines which values are displayed in the Densitometer window. For more information, see Using the Densitometer.

Scanning Mode

Use this setting to select between speed and quality. Best provides the best quality image, while Draft provides faster scanning with some loss of quality. Note that you can also change the scanning mode of the previewed image using the Configuration dialog box. See Making Configuration Settings for details.

De-screening

Select either On or Off. When On is selected, moiré patterns are automatically removed from scanned images, but scanning takes longer.

Auto Exposure Option

Allows you to specify the kinds of adjustments made by the Auto Exposure feature. When scanning photographs or documents that contain high quality images, select Photo. Select Document when scanning printed text.

Note:

You can see the adjustments made by the Auto Exposure feature in the Preview window. For details on using the Auto Exposure feature, see Auto Exposure.

Dropout

Select a color to subtract from a black and white scan of a colored original. Proper use of dropout can improve the quality of your black and white scans. Available dropout options are:
None, Red, Green, and Blue.

Note:

Dropout is available only when Pixel Depth is set to 8-bit Gray or Black & White.

Depending on the image, you may need to adjust the Threshold setting in the Image Controls dialog box before making the Dropout setting to achieve the desired effect. For more information on the Threshold setting, see Image Controls.

B/W Options

These options are useful when scanning text or grayscale images.

Text Enhancement Technology
To improve recognition accuracy during OCR (optical character recognition) scanning, select this option. This function eliminates the document background from scans.

Auto Area Segmentation
To make grayscale images clearer and text recognition more accurate, select this option. This function separates text from graphics.

Note:

The B/W Option setting is available only when Black & White is selected as the Pixel Depth setting.

When you need neither Text Enhancement Technology nor Auto Area Segmentation, select None.

Halftone

Select a halftone or dither setting to reproduce images using special dot patterns:
Mode A (Hard Tone), Mode B (Soft Tone), Mode C (Net Screen), Dither A (4 x 4 Bayer), Dither B (4 x 4 Spiral), Dither C (4 x 4 Net Screen), Dither D (8 x 4 Net Screen), or None.

Note:

Halftone is available only when Pixel Depth is set to Black & White.

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