scan-lide

#!/bin/bash

scan() {
  [ $# -ge 1 ] || exit 1
  OUT="$1"
  shift
  DPI="${1:-300dpi}"
  WIDTH="${2:-214}"
  HEIGHT="${3:-295}"
  DEVICE=pixma
  if [ -z "${1}" ]; then
    scanimage --device $DEVICE --format=png --output-file "$OUT" -l2 -t 2 -x "$WIDTH" -y "$HEIGHT" --resolution "$DPI" --button-controlled=yes
  else
    scanimage --device $DEVICE --format=png --output-file "$OUT" -x "$WIDTH" -y "$HEIGHT" --resolution "$DPI" --button-controlled=yes
  fi
}

autocrop() {
  [ $# -ge 1 ] || exit 1
  TMP=`mktemp`
  ORIG="$1"
  INFO=`convert "${ORIG}" -virtual-pixel edge -blur 0x15 -fuzz 5% -trim +repage -format '%[fx:w]x%[fx:h]+%[fx:page.x]+%[fx:page.y]' info:`
  convert "${ORIG}" -crop "$INFO" +repage ${TMP}
  mv "${TMP}" "${ORIG}"
}

ctrl_c() {
  exit 0
}

scan_loop() {
  if [ -z "${2}" ]; then
    echo "Press scanner button to scan each image at "${1:-300dpi}". (auto-crop enabled)" >&2
  else
    echo "Press scanner button to scan each image at "${1:-300dpi}". (manual size disabled auto-crop)" >&2
  fi
  for x in {001..999}; do
    [ -s "${x}.png" ] || { 
      scan "${x}.png" "$@"
      if [ -z "${2}" ]; then
        autocrop "${x}.png" 
      fi
      echo "Press scanner button to scan next image" >&2
      # beep # feel free to enable, all beeps are disabled on my system anyway.
    }
  done
}

if [ "$1" == "-h" ]; then
  echo "Usage: scan-lide [DPI] [WIDTH-MM] [HEIGHT-MM]"
  echo "   ex  scan-lide 600dpi 195 155 # (leuchtterm size)"
  exit 0
fi
if which scanimage >/dev/null 2>/dev/null; then :; else
    echo "Missing program: scanimage" >&2
    echo "Run: pacman -S sane" >&2
    exit 1
fi

scan_loop "$@"