gscan2pdf - Duplex scanning, with OCR

After setting up my Fujitsu ScanSnap S1300i on Debian Jessie (stable), I began scanning duplex pages:

• sudo gscan2pdf
• Place pages into scanner, face down
• File > Scan
• Select device (in my case, "FUJITSU ScanSnap S1300i")
• Page Options Tab
• # Pages: All
• Source Document: Single sided (note: we select duplex, later)
• Select button "Options", for line "Clean up images"
• Select tab "Filters"
• White threshold: 0.90
• Black threshold: 0.48 (note: this currently does not save, for me!)
• Scan Mode Tab
• Scan Source: ADF Duplex (note: this scans both sides at once!)
• Scan mode: Lineart (note: best for scanning text)
• Scan resolution: 300
• Geometry Tab: accept defaults
• Enhancement Tab:
• Threshold: 50 (note: this helps cleans up artifacts)
• Sensors Tab: accept defaults
• Page options > Scan button
• Close the popup window
• File > Save

If you like, save the Scan Profile.

LINKS

http://ubuntuforums.org/showthread.php?t=1681579