https://scratch.mit.edu/projects/108678258/

letter_each_convert.sh

#! /bin/bash

if [[ -n "$1" ]]; then
    filename=$1
else
    filename="test.in"
fi

if [[ ! -e ${filename} ]]; then
    echo "File ${filename} not found."
    exit 1
fi

cat ${filename} | while read term; do
    echo "#" ${term}
    # http://www.imagemagick.org/Usage/text/#caption
    convert \
	-size 96x96 \
	-background white \
	-transparent white \
	-fill "#000000" \
	-font sawarabi-mincho-medium.ttf \
	-gravity center \
	caption:${term} \
	output/${term}.png
done