add posterize-image script

default/bin/posterize-image.sh

@@ -0,0 +1,84 @@
+#!/bin/bash
+
+hex='d7afaf'
+hex_alt='111317'
+invert_flag=''
+dithering='FloydSteinberg'
+contrast='10'
+morph_level='7'
+threshold='50'
+
+help() {
+  executable_path=$(basename "${0}")
+  printf "Usage: %s {FLAGS} [FILE]\n\
+  ARGUMENTS:\n\
+    -h    display this help menu\n\
+    -c    [20] contrast level\n\
+    -m    [1] morph edge level\n\
+    -t    [20] threshold \n\
+    -p    [d7afaf] Primary hex color\n\
+    -s    [111317] Secondary hex color\n\
+    -n    Disable dithering\n\
+    FILE  Full path to original image file\n" "${executable_path}"
+  exit 1
+}
+
+while getopts "hc:m:t:p:s:in" flag 2>/dev/null; do
+  case "${flag}" in
+  h)
+    help
+    ;;
+  c)
+    contrast="${OPTARG}"
+    ;;
+  m)
+    morph_level="${OPTARG}"
+    ;;
+  t)
+    threshold="${OPTARG}"
+    ;;
+  p)
+    hex="${OPTARG//#/}"
+    ;;
+  s)
+    hex_alt="${OPTARG//#/}"
+    ;;
+  i)
+    invert_flag='-negate'
+    ;;
+  n)
+    dithering='None'
+    ;;
+  *)
+    printf "[ERROR] Invalid flag: %s\n\n" "${flag}"
+    help
+    ;;
+  esac
+done
+
+shift $((OPTIND - 1))
+
+file="${1}"
+
+if [[ -z ${file} || ! -f "${file}" ]]; then
+  printf '[ERROR] Please provide an image file!\n\n'
+  help
+fi
+
+hex="${hex//#/}"
+hex_alt="${hex_alt//#/}"
+
+printf "primary color: #%s\nsecondary color: #%s\nfile: %s\n" "${hex}" "${hex_alt}" "${file}"
+
+new_filename=$(basename "${file}")
+
+#convert -size 1x1 "xc:#${hex}" "xc:#${hex_alt}" -append txt:- | convert "${file}" ${invert_flag} -dither "${dithering}" -remap txt:- "${new_filename}-posterized-$(date +%Y-%m-%d_%H-%M-%S).jpg"
+convert -size 1x1 "xc:#${hex}" "xc:#${hex_alt}" -append -colorspace rgb txt:- | convert "${file}" -set colorspace Gray ${invert_flag} -contrast-stretch "${contrast}%" -dither "${dithering}" -threshold "${threshold}%" -morphology EdgeIn "Diamond:${morph_level}" -remap txt:- "${new_filename}-posterized-$(date +%Y-%m-%d_%H-%M-%S).jpg"
+
+#convert "${1}" -contrast-stretch 7% -set colorspace Gray -separate -average +level-colors "#111317","#d7afaf" "$(basename ${1})-recolored-$(date +%Y-%m-%d_%H-%M-%S).jpg"
+
+#convert "${1}" -linear-stretch 90% -fill black -colorize 5% -set colorspace Gray -separate -average +level-colors "#111317","#d7afaf" "$(basename ${1})-recolored-$(date +%Y-%m-%d_%H-%M-%S).jpg"
+#convert "${1}" -contrast-stretch 5% -fill black -colorize 5% -set colorspace Gray -separate -average +level-colors "#111317","#d7afaf" "$(basename ${1})-recolored-$(date +%Y-%m-%d_%H-%M-%S).jpg"
+
+#convert "${1}" -contrast-stretch 25% -fill black -colorize 25% -set colorspace Gray -separate -average +level-colors "#111317","#d7afaf" "$(basename ${1})-recolored-$(date +%Y-%m-%d_%H-%M-%S).jpg"
+#convert "${1}" -contrast-stretch 100% -fill black -colorize 25% -set colorspace Gray -separate -average +level-colors "#111317","#d7afaf" "$(basename ${1})-recolored-$(date +%Y-%m-%d_%H-%M-%S).jpg"