Troubleshooting / Problems and Solutions

Quality Problems

The entire image is distorted or blurred
Part of the image is distorted or blurred
Colors are patchy or distorted at the edges of the image
The image is faint or out of focus
The image is too dark
Image is dark, with little or no detail
Scanned image is too large
Moiré (cross-hatch) patterns appear in the scanned image
Poor character recognition during OCR scanning

The entire image is distorted or blurred

Try one or more of these solutions:

• Make sure the document is flat against the document table.

Caution:

Do not place heavy objects on the document table.

• Make sure you do not accidentally move the document during scanning.

• Make sure the scanner is on a flat, stable surface.

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Part of the image is distorted or blurred

Make sure the document is uniformly flat against the document table. A document that is wrinkled or warped may not scan well.

Caution:

Do not place heavy objects on the document table.

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Colors are patchy or distorted at the edges of the image

Try one or more of these solutions:

• A document that is very thick or warped at the edges can cause discoloration. Cover the edges of the document with paper to block outside light.

• Make sure the document is flat against the document table.

Caution:

Do not place heavy objects on the document table.

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The image is faint or out of focus

Try one or more of these solutions:

• Make sure the document is flat against the document table.

Caution:

Do not place heavy objects on the document table.

• Adjust your software's Exposure setting using the Auto Exposure button in the Professional Mode.

• Adjust your software's Gamma setting using the Histogram Adjustment dialog box in the Professional Mode.

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The image is too dark

Try one or more of these solutions:

• Check your software's Brightness setting using the Image Adjustment tools in the Home Mode or the Histogram Adjustment dialog box and the Image Adjustment dialog box in the Professional Mode.

• Check the brightness and contrast settings of your computer display.

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Image is dark, with little or no detail

Try one or more of these solutions:

• Change the Display Gamma setting of the scanning image for your output device, such as monitor or printer, in the Configuration dialog box.

• Change the Destination setting in the Home Mode or the Professional Mode main window.

• In the Home Mode, select Screen/Web as the Destination. Selecting a printer may cause on-screen colors to be different from the colors of the original, however, colors will be reproduced correctly when the image is printed.

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Scanned image is too large

Change the Target Size setting of the Destination setting in the Home Mode or the Professional Mode main window.

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Moiré (cross-hatch) patterns appear in the scanned image

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

Try one or more of these solutions:

• Check the Descreening Filter check box in the Home Mode or the Professional Mode main window.

• In the Professional Mode, set the Screen Ruling to the appropriate setting for your document.

• Place a transparent sheet such as an overhead projector sheet, between the document and the document table.

• Reposition the document slightly.

• Make the image size slightly smaller.

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Poor character recognition during OCR scanning

Try adjusting the Threshold setting. See Scan Text for more information.

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