tokenize.sh

#!/usr/bin/env bash

img=$1
circle_img=$2
token_img="$(echo "$img" | cut -d. -f1)-token.$(echo "$img" | cut -d. -f2)"

# Crop the image to a circle
magick "$img" \( \
    +clone \
    -threshold 101% \
    -fill white \
    -draw 'circle %[fx:int(w/2)],%[fx:int(h/2)] %[fx:int(w)],%[fx:int(h/2)]' \
    \) -channel-fx '| gray=>alpha'  \
    "$token_img"

# Get the image dimensions
img_dim=$(identify "$token_img" | awk '{ print $3 }')

# Overimpose the circle PNG over the circle image
magick "${token_img}" "${circle_img}" -gravity Center -geometry "${img_dim}" -composite "${token_img}"
echo ${token_img}