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📷 IPEVO Document Camera → Scan to PDF (Linux Mint)

🎯 Objective

Create a fast, reliable document scanning workflow using a USB document camera on Linux Mint.

🧠 Key Concept

The IPEVO is a camera, not a scanner.

📷 Capture → 🧹 Clean → 📄 PDF

⚙️ Requirements

apt install ffmpeg imagemagick img2pdf v4l-utils

🚀 Quick Scan Command (Recommended)

ffmpeg -y -f video4linux2 -i /dev/video0 -frames:v 1 -update 1 scan.png && img2pdf scan.png -o scan.pdf && xdg-open scan.pdf

✔ What it does:

  • Captures image from camera

  • Converts to PDF

  • Opens automatically

✨ Improved Scan (Cleaner Output)

ffmpeg -y -f video4linux2 -i /dev/video0 -frames:v 1 -update 1 scan.png && convert scan.png -crop 90%x90%+5%+5% -colorspace Gray -contrast-stretch 0 scan_clean.png && img2pdf scan_clean.png -o scan.pdf && xdg-open scan.pdf

✔ Enhancements:

  • Crops edges

  • Converts to grayscale

  • Improves contrast (scanner-like look)

⚠️ Fallback (If img2pdf fails)

ffmpeg -y -f video4linux2 -i /dev/video0 -frames:v 1 -update 1 scan.png && convert scan.png scan.pdf && xdg-open scan.pdf

🧩 Key Tips

📐 Positioning

  • Keep document flat on desk

  • Maintain fixed distance (~20–30 cm)

  • Fill ~70% of frame

💡 Lighting

  • Use consistent desk lighting

  • Avoid shadows

🔍 Focus Stability (Optional)

v4l2-ctl -d /dev/video0 --set-ctrl=focus_auto=0

📄 Multi-page PDF

img2pdf page1.png page2.png page3.png -o document.pdf

⚡ One-Click Scan Script

nano ~/scan-to-pdf.sh

Paste:

#!/bin/bash
FILE="$HOME/scan_$(date +%Y%m%d_%H%M%S).png"
PDF="${FILE%.png}.pdf"

ffmpeg -y -f video4linux2 -i /dev/video0 -frames:v 1 -update 1 "$FILE"
convert "$FILE" -crop 90%x90%+5%+5% -colorspace Gray -contrast-stretch 0 "${FILE%.png}_clean.png"
img2pdf "${FILE%.png}_clean.png" -o "$PDF"
xdg-open "$PDF"

Make executable:

chmod +x ~/scan-to-pdf.sh

⚠️ Common Pitfalls

  • Scanner apps (simple-scan, gscan2pdf) won’t detect the camera

  • Poor lighting reduces quality

  • Camera too far → loss of detail

🧠 Workflow Summary

Document → Camera → ffmpeg → Image → img2pdf → PDF

🏁 Outcome

✔ Fast, repeatable scanning
✔ Fully Linux-native workflow
✔ No proprietary software

🧠 One-Line Insight

Your desk becomes the scanner — the camera just captures it.

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