process-img


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#!/bin/bash

usage()
{
	echo 'Usage: process-img [-f fuzz] file...' >&2
	exit 1
}

while getopts 'f:' opt
do
	case "$opt" in
	f)
		fuzz="$optarg"
		;;
	*)
		usage
	esac
done

shift $(($OPTIND - 1))
[ "$#" -eq 0 ] && usage

for img in "$@"
do
	(
		read w h < <(identify -format "%w %h" "$img")
		magick "$img"                                       \
			   -alpha on -fuzz ${fuzz:-3%} -fill none       \
			   -draw "color 0,0 floodfill"                  \
			   -draw "color 0,$((h-1)) floodfill"           \
			   -draw "color $((w-1)),0 floodfill"           \
			   -draw "color $((w-1)),$((h-1)) floodfill"    \
			   "${img%.*}.avif"
	) &
done
wait