This script can be used to convert a series of document pictures to a pdf, automatically applying edge detection at dewarping the images.

autoscan.sh

#!/usr/bin/env bash
# Given an output PDF filename and a list of images, adjust and OCR the images and create a PDF
OUT_NAME=$1
shift
mogrify -auto-orient $@
TMPDIR=`mktemp -d`
scantailor-cli -l=1 --dewarping=auto --start-filter=1 --end-filter=6 $@ "$TMPDIR"
for IN in $@
do
    FILENAME=`basename -s .jpg "$IN"`
    PDFINPUTS="$PDFINPUTS $TMPDIR/$FILENAME.tif"
done
convert $PDFINPUTS $TMPDIR/output.pdf
ocrmypdf $TMPDIR/output.pdf "$OUT_NAME"

convert_new.sh

#!/usr/bin/env bash
# Create scans from images in subdirectories of the CWD
for DIR in $(ls -d */)
do
  OUTFILE="$(basename $DIR).pdf"
  if [ ! -f "$OUTFILE" ]; then
    echo "Scanning new document $DIR to $OUTFILE"
    ./autoscan.sh "$OUTFILE" $DIR/*.jpg
  fi
done

shell.nix

with import <nixpkgs> {};

pkgs.mkShell {
  buildInputs = [
    imagemagick
    scantailor
    ocrmypdf
    bash
  ];
}