Simulate hard copy printing and scanning

simulate_print_and_scan.sh

#!/bin/bash

if [ -z "$1" ]; then
  echo "Usage: $0 input.pdf"
  exit 1
fi

INPUT_PDF="$1"
OUTPUT_PDF="scanned_${INPUT_PDF%.pdf}.pdf"

mkdir -p temp_images

magick -density 150 "$INPUT_PDF" -quality 90 temp_images/page-%03d.jpg

if [ ! -f temp_images/page-000.jpg ]; then
  echo "Error: Failed to extract images from PDF. Exiting."
  exit 1
fi

for img in temp_images/page-*.jpg; do
  OUTPUT_IMG="temp_images/processed-$(basename "$img")"
  
  magick "$img" -blur 0x0.5 +noise Gaussian -level 15%,85% \
    -brightness-contrast -2x5 -rotate 0.25 "$OUTPUT_IMG"
  
  if [ ! -f "$OUTPUT_IMG" ]; then
    echo "Error processing $img. Skipping."
  fi
done

if ls temp_images/processed-*.jpg 1> /dev/null 2>&1; then
  magick temp_images/processed-*.jpg -quality 90 "$OUTPUT_PDF"
  echo "Processed file saved as: $OUTPUT_PDF"
else
  echo "Error: No processed images found. Exiting."
  exit 1
fi

rm -r temp_images