Epson EcoTank Photo ET-8500 Wireless Color All-in-One Supertank Printer - Manual (Page 314)

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Characters are Not Recognized During Conversion to Editable Text (OCR)
If characters in your scanned images are not recognized during OCR conversion, try these solutions:
• Make sure your original is loaded straight on your product.
• Use an original with clear text.
• When saving scanned images as Searchable PDFs, make sure the correct OCR language is selected.
• Adjust the following Epson Scan 2 settings if available, and try scanning again:
• On the Main Settings tab, make sure you select the correct Image Type for your original.
• On the Main Settings tab, set the Resolution between 200 and 600 dpi.
• On the Advanced Settings tab, select Text Enhancement and choose a setting.
Note: The Text Enhancement setting depends on the selected Image Type .
• If the Image Type is set to Black & White , adjust the Threshold setting on the Advanced Settings
tab. (The Image Option must be set to None or Color Enhance .)
Parent topic: Solving Scanned Image Quality Problems
Related references
Additional Scanning Settings - Main Settings Tab
Additional Scanning Settings - Advanced Settings Tab
Image Colors are Patchy at the Edges
If you are scanning a thick or warped original, cover its edges with paper to block external light as you
scan it.
Parent topic: Solving Scanned Image Quality Problems
Ripple Patterns Appear in an Image
You may see a ripple pattern (called a moiré) in scanned images of printed documents. This is caused
by interference from differing pitches in the scanner's screen and your original's halftone screen. To
reduce this effect, adjust these Epson Scan 2 settings (if available) and try scanning again:
• Select the Descreening setting.
• Select a lower Resolution setting.
Parent topic: Solving Scanned Image Quality Problems