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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.

Make sure the document is flat against 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.

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.

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The image is faint or out of focus.

Make sure the document is flat against the document table.

Adjust your software's Exposure setting.

Adjust your software's Gamma setting. See Adjusting the Gamma setting.

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The image is too dark.

Check your software's Brightness setting. See Adjusting Brightness and Contrast.

Check the brightness and contrast settings of your computer display.

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Image is dark, with little or no detail.

Change the Display Gamma setting. See Display Gamma.

Change the Destination setting. Select Screen/Web as the destination in the Manual mode window. See Selecting a 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 it is printed.

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Scanned image is too large.

Change the image size setting in the Manual mode window.

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

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

Make sure Image Type is set to Color Document or Black & White Document in the Manual mode window.

Change the Image Type settings. Turn the De-screening setting On in the Image Type dialog box.

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 in the Image Controls dialog box.

Select Text Enhancement Technology from B/W Option in the Image Type dialog box to eliminate background noise.

For Perfection 1650 users:
Change the Image Type setting. Select Text (Background Removal) as Selecting an Image Type.

See Optimizing Text Scanning for OCR for more information.

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