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Understanding EPSON TWAIN Features

Scanning from EPSON TWAIN
Reset Button
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When you start EPSON TWAIN through a TWAIN-compliant application, one of the following windows appears on the screen:

Note for Macintosh users:

Most illustrations shown in this chapter are for Windows, so they may vary from the actual dialog boxes that appear on your screen. However, all the settings and functions are the same for both systems.

The following sections describe the features of EPSON TWAIN.

Note:

Some settings may appear dimmed and cannot be selected because of incompatibility with your Stylus Scan or your choice of settings.

Scanning from EPSON TWAIN

EPSON TWAIN allows you to make detailed settings. You can set parameters for a setting or select special functions provided with EPSON TWAIN to obtain the highest quality scanned images.

Note:

Online help also provides you with information on settings. Click the ? button in the EPSON TWAIN dialog box.

You cannot scan an image that exceeds available memory or disk space. If you attempt to scan an image that is too large, an alert appears on the screen.

Before you begin scanning, you should calibrate your screen. For details, see Calibrating Your Screen.

After an image is scanned, be sure to save or export it.

Previewing images

Before you scan and save an image, you can preview it in the Preview window located on the right of the EPSON TWAIN dialog box. Use the preview feature to check the results of your settings.

To preview the entire image, click the preview button.

To preview a part of the image that is already in the Preview window, click and drag the mouse over the area you want to see in detail, and click the zoom preview button.

Note:

You cannot preview an image that exceeds available memory or disk space. If you attempt to preview an image that is too large, an alert appears on the screen.

When the mouse pointer is placed within the marquee (the frame of the selected image area), it changes to a hand. When this happens, you can click and drag the marquee anywhere in the Preview window.

When the mouse pointer is placed on the edge of the marquee, it changes to a double-headed arrow, allowing you to re-size the marquee.

To remove or delete a marquee, double-click the preview window.

Modifying the preview image

You can see the effects of the following settings in the preview image.

Unsharp Mask in the EPSON TWAIN window

Pixel Depth, Halftone, and Dropout in the Image Type dialog box

Exposure, Gamma, Highlight, Shadow, and Threshold in the Image Controls dialog box

Tone Correction in the Tone Correction dialog box

Gray Balance Intensity, and Saturation in the Color Adjustment dialog box

Auto Exposure

Note:

Although the image in the Preview window changes as you make settings, the settings do not affect the actual image until you scan, or re-scan, the image.

Document Source

When using the document table of the Stylus Scan, leave the Document Source set to Flatbed. Other selections are available depending on what is installed. These are the optional Auto Document Feeder, and TPU for Neg. Film or TPU for Pos. Film (for the optional Film Adapter).

Note:

Uninstalled options are not displayed.

Flatbed:

Choose this setting to use the document table of the Stylus Scan.

Auto Document Feeder:

Choose this setting to use the optional Automatic Document Feeder.

TPU for Neg. Film, TPU for Pos. Film:

Select one of these settings when using the optional Film Adapter. If you are scanning negative film, select TPU for Neg. Film, and if you are scanning positive film (or slides), select the TPU for Pos. Film setting.

Image Type

Use the Image Type list or button to select the type of image to be scanned.

Image Type list

The Image Type list provides the following predefined settings. EPSON recommends you use the predefined settings first, then later improve the quality of the scanned image manually by making the detailed settings described in the next pages, if necessary. Click the arrows on the right to view all of the available settings.

Color Photo:

24-bit Color, best quality

Color Photo De-screening:

24-bit Color, best quality with De-screening to remove moiré patterns

Note:

A moiré is a crosshatch 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.

Black & White Photo:

8-bit Gray, best quality

Line Art:

Black and white, draft quality

OCR:

Black and white, best quality, with Text Enhancement Technology

Copy and Fax:

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

Image Type button

The Image Type button allows you to customize the Image Type settings. If you want to make many detailed settings manually, use this feature.

Click the Image Type button. The following dialog box appears.

Image Type Name:

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

Pixel Depth:

Select scanning colors from:
24-bit Color, 8-bit Gray, and Black & White.

Scanning Mode:

Select either Best or Draft scanning quality. Select Best when quality is more important than speed.

De-screening:

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

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 scan, you may need to adjust the Threshold setting in the Image Controls dialog box to enable this feature.

B/W Options:

Select from:
Text Enhancement Technology, Auto Area Segmentation, or None.

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 Options setting is available only when Black & White is selected as the Pixel Depth setting.

When you need neither TET nor AAS, select None. Default is None.

To apply the settings you made, click OK. The Preview window displays the effects of the current settings except for TET (Text Enhancement Technology) and AAS (Auto Area Segmentation) settings.

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.

To apply the settings you made, click OK. The Preview window displays the effects of the current settings except for TET (Text Enhancement Technology) and AAS (Auto Area Segmentation) settings.

To cancel the settings, click Cancel.

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 an Image Type setting, select the setting name to be deleted in the Image Type Name menu, then click Delete.

Destination

Select the destination, or output device, where the scanned image is to be printed or displayed using the Destination list or button.

Destination list

The Destination list contains the following predefined settings and any custom settings you have saved in the Destination dialog box. Click the arrows on the right to view all the available settings.

Destination name	Resolution
Destination name	Line drawings and halftone images	Photos
Screen/Web	96 dpi (for Windows) 72 dpi (for Macintosh)	96 dpi (for Windows) 72 dpi (for Macintosh)
Fax	200 dpi	200 dpi
OCR	300 dpi	300 dpi
Printer (Fine)	360 dpi	150 dpi
Printer (Photo)	720 dpi	300 dpi
Laser Printer	600 dpi	200 dpi

If you are using an EPSON Stylus printer or Stylus Scan and are printing scanned images with Economy, Normal, or Fine Print Quality settings in your printer software, selecting Printer (Fine) is recommended. If you are printing with the SuperFine or Photo Print Quality settings, select Printer (Photo).

Note:

The effects of the Destination settings cannot be viewed in the Preview window.

Destination button

The Destination button allows you to customize the Destination settings. To make your own settings, such as scanning resolution, click this button. The following dialog box appears.

Destination Name:

Predefined and custom settings names appear in the Destination menu.

Resolution:

Select a scanning resolution for line drawing and halftone images, or photos.

Note:

When the Pixel Depth setting in the Image Type dialog box is set to Black & White, the Drawing/Halftone setting takes effect and the Photo setting becomes irrelevant. For other Pixel Depth settings, the Photo setting takes effect and the Drawing/Halftone setting becomes irrelevant.

To print your scanned document when Resolution is set to Drawing/Halftone, select the same resolution setting from the list as you select in the printer driver. To print your scanned document when Resolution is set to Photo, select a resolution between 150 and 300 dpi. If you select higher resolution, the Photo setting requires longer to print, but does not improve the output quality.

The Resolution setting is closely related to the Image Size and Scale settings. If you change them arbitrarily, the resulting image may not be what you expected.

The range of resolution values depends on your Stylus Scan.

To apply the settings you made, click OK. To cancel the settings, click Cancel.

To save the settings you made, type a new name in the Destination Name box, and then click Save.

To delete a Destination setting, select the target setting name to be deleted in the Destination Name menu, then click Delete.

Unsharp Mask

You can select or deselect the Unsharp Mask setting. Selecting this check box improves image sharpness.

Unsharp mask off

Unsharp mask on

Source and Target image sizes

The Source fields indicate the size of the image that is displayed or selected in the Preview window.

The Target fields indicate what size the image will be when it is output.

Note:

The image size setting is closely related to the Resolution. If you change either setting arbitrarily, the resulting image may not be what you expected.

Width and Height menu:

The width and height of an image are indicated in the selected unit of measure. You can type new values directly in the indicator fields, or you can change the image area in the Preview window by creating a marquee, or frame. Do this by dragging the mouse over the desired area. See Previewing images for more information on marquees.

Units menu:

Select a unit of measurement. You can select pixels, inches, or cm.

Storage size indicator:

The storage size of an image is indicated in KB or MB. As you change the image area in the Preview window, this value also changes.

Lock button:

The current size of width-to-height of the target image can be locked, allowing the ratio of width-to-height of the Source image to change according to the scale value, or the scale value to change according to the ratio of width-to-height of the Source image. This is especially useful in cases where the size of an image does not fit the size of the paper on which you want to print the image, but you want to keep the image's original proportions. Enter the size of the paper in the Width and Height fields of the Target box and then click the lock button. The scale value is automatically changed, maintaining the current ratio of width-to-height to fit the paper.

Resolution:

The resolution for the current scanning operation can be changed by selecting a resolution or typing in the value. this setting overrides the resolution setting you make in the Destination dialog box.

Scale slider:

An image can be reduced or enlarged by moving the Scale slider. You can also click the left or right arrow to change the image size in 1% increments.

The range of possible reduction or enlargement varies depending on the current resolution setting.

Scale indicator:

The percentage of enlargement or reduction is shown in the Scale indicator field. You can type a new value directly into this field, or use the Scale slider to determine the value.

Image Controls

Click the Image Controls button to view the following dialog box.

Note:

The Image Controls button appears dimmed and is not available when TET (Text Enhancement Technology) is selected in the Image Type dialog box.

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 contrast allows you to adjust the mid-tones in an image. You can select from 50 (lowest) to 500 (highest) 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.

Click the eyedropper button beneath the slider, and the mouse pointer changes to an eyedropper. Move the eyedropper over the preview image, and click a bright area. The eyedropper "picks up" the color from that area, and uses it as the highlight for the entire image. This effect shows up immediately in the preview image. Click Cancel to restore the original image.

Shadow:

The Shadow control allows you to adjust the darkness level of the darkest parts of an image. You can select from 0 to 60 by moving the slider.

Click the eyedropper button beneath the slider, and the mouse pointer changes to an eyedropper. Move the eyedropper over the preview 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. This effect shows up immediately in the preview image. Click Cancel to restore the original image.

Threshold:

Available only when Pixel Depth is set to Black & White and Halftone is set to None in the Image Type dialog box. The Stylus Scan scans gray shades as either black or white using this setting.

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

Tone Correction

Click the Tone Correction button to view the following dialog box.

Note:

The Linear Tone Correction settings are used when you scan from the Easy menu.

The Tone Correction button appears dimmed and is not available when Pixel Depth is set to Black & White, Halftone is set to None, and TET (Text Enhancement Technology) is selected in the Image Type dialog box.

You can see the effects of the Tone Correction settings in the Preview window.

The tone value represents the contrast in the tonal relationship between an original image and its reproduction on a monitor or printer.

Tone Curve editor:

The editor allows you to customize tone correction. Drag points on the tone curve to adjust the tone value. You can edit up to five tonal elements.

Output options:

If you select the check box for a specific point, such as 1/4 Tone or Midtone, you can move that point and it will remain where you leave it; it will not be affected by the movement of other points on the curve. If the check box is clear, the point will be affected by the movement of other points.

Channels options:

You can select the combined red, green, and blue (RGB) channel to modify all colors, or select these colors separately.

Note:

If Pixel Depth is set to Black & White or 8-bit Gray in the Image Type dialog box, you can only select the combined RGB channel option.

Tone correction list:

Select a tone correction setting from this list. The custom settings you have saved appear in this list.

OK/Save/Delete/Cancel buttons:

To accept the defined Tone Correction or close the dialog box, click OK.

After you correct tone, type a name for your custom settings in the tone correction list and click Save.

To delete a setting, select the name of the setting you want to delete in the tone correction list and click Delete.

To cancel the operation, click Cancel.

Color Adjustment

Click the Color Adjustment button to view the following dialog box.

Note:

If the Image Type setting is not Color Photo, or Color Photo De-Screening, or the Pixel Depth is set to 8-bit Gray or Black & White, the Color Adjustment button appears dimmed and these settings cannot be selected.

You can see the effects of the Color Adjustment settings in the Preview window.

Gray Balance Intensity:

Gray Balance Intensity removes unwanted color casts and tints by balancing color saturation.

Click the eyedropper button beneath the slider. The mouse pointer changes to an eyedropper. Then click the color you want to be gray. The eyedropper "picks up" the color and displays it in the box beside the eyedropper button. You can then correct the cast level for that color from 0 to 100 by moving the slider. The corrected color appears in the box on the right, and the effect shows up immediately in the preview image. Click Cancel to restore the original image.

Saturation:

Saturation is the property that defines color depth. Select the saturation level for color from -100 (less color) to 100 (more color) by moving the slider.

Auto Exposure

Click the Auto Exposure button to automatically optimize the exposure for an image. The Gamma, Highlight and Shadow settings in the Image Controls dialog box are automatically set.

Note:

The Auto Exposure button appears dimmed and is not available when Pixel Depth is set to Black & White and AAS is not selected in the Image Type dialog box.

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Reset Button

Use the Reset Button to return any image control settings you made back to their default settings. If you do not alter any image control settings, this button appears dimmed and is not available.

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Auto Locate

Click the Auto Locate button to cause the Stylus Scan to automatically locate and select the target image. The image appears without white borders in the Preview window.

If a document contains more than one image, select a target image by dragging the mouse pointer over the image and clicking the Auto Locate button. The selected target image is located automatically.

Settings

Click the Settings button to view the following dialog box. You can view all the settings for the current preview image in this dialog box. Also, you can apply any custom settings you have saved.

To save the currently selected settings, type a new name in the User defined settings field, then click Save.

To apply saved settings, select a setting name from the list, then click OK. The preview image will reflect the settings you saved.

To restore the previous settings, click Cancel.

To delete a setting, select the setting name in the list, then click Delete.

To scan a single image with several different settings, make and save each group of settings as described above. Then hold down the Shift key while clicking the custom settings you want to select in the User defined settings list. After selecting all the settings you want to use when scanning, click Batch Scan. The Stylus Scan scans the image once for each group of settings you have selected.

Configuration

Click the Configuration button to view the following dialog box. You can make settings that affect the Preview window.

Save Preview Image and Settings:

Select this check box to automatically save the preview image and all the image settings when you exit EPSON TWAIN (quit scanning). The next time you start EPSON TWAIN, the image and settings will reappear.

Fast Preview:

Enables high-speed loading of the preview image. If this is selected, the preview image is scanned in Draft mode. If this is not selected, the preview image is scanned in Best mode, and you can get accurate values of the Highlight, Shadow, and Gray Balance Intensity by sampling using the eyedropper in the preview image.

Do not use this feature (do not select the check box) when quality is more important than speed.

Automatic Preview:

Previewing automatically starts when EPSON TWAIN is launched.

Auto Exposure on Preview:

Displays the preview image with automatically optimized exposure settings. The result is the same as if you clicked the Auto Exposure button.

ICM, ICM/sRGB (for Windows)

Depending on the version of Windows installed in your computer, this setting may be unavailable or have a different caption.

Select this check box to reproduce the colors in your image using the Windows ICM color management system. This setting appears only with the Windows operating system.

Note:

If your output devices (printer and monitor) do not support ICM, leave this check box clear.

ColorSync (for Macintosh)

Select this check box to reproduce the colors in your image using the ColorSync color management system. This setting appears only with Macintosh computers.

Note:

If your output devices (printer and monitor) do not support ColorSync, leave this check box clear.

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