Watermarks photos of your personal documents using ImageMagick

watermark.sh

#!/bin/bash
set -euo pipefail
if [[ $# -ne 2 ]]; then
    echo "Usage: $0 IMAGE WATERMARK-TEXT"
    exit 1
fi

FILE=$1
TEXT=$2
TARGET_FILE=${FILE%.*}-watermark.${FILE##*.}

convert -size 2000x1000 xc:none -fill "#00000070" \
      -gravity NorthWest -pointsize 300 -draw "text 75,80 '$TEXT'" \
      -gravity SouthEast -pointsize 300 -draw "text 50,160 '$TEXT'" \
      miff:- |\
composite -tile - $FILE $TARGET_FILE