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 the image 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 materials. It is a result of interference 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 16 60 Photo and 2400 Photo u sers:
  Change the Image Type setting. Select Text (Background Removal) as the Image Type. See Optimizing Text Scanning for OCR for more information.

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