Epson Expression 800 User Manual - TWAIN - Page 61

Moiré crosshatch patterns appear in the scanned image., Troubleshooting,

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Moiré (crosshatch) patterns appear in the scanned image. Problem Solution You have scanned a document with halftone patterns. To minimize moiré patterns, try the following:  Place a transparent sheet between the document and the document table to unfocus the image slightly.  Move or angle the document slightly.  Adjust the Sharpness setting to a lower value to unfocus the image. See Customizing Destination Settings for more information.  Change the Scale setting slightly.  In the Image Type dialog box, make sure the Scanning Mode option is set to Best and the De-screening option is set to On. See Customizing Image Types for details. Troubleshooting Page 61

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Troubleshooting
Page 61
Moiré (crosshatch) patterns appear in the scanned image.
Problem
Solution
You have scanned a
document with halftone
patterns.
To minimize moiré patterns, try the following:
Place a transparent sheet between the document and the document
table to unfocus the image slightly.
Move or angle the document slightly.
Adjust the Sharpness setting to a lower value to unfocus the image.
See
Customizing Destination Settings
for more information.
Change the Scale setting slightly.
In the Image Type dialog box, make sure the Scanning Mode option
is set to
Best
and the De-screening option is set to
On
. See
Customizing Image Types
for details.