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#!/bin/sh
set -e
# get frames path from cli args
framespath=${1:-}
[ -z "$framespath" ] && echo "no framespath provided" && exit 1
# draw random pic
mkdir -p gray
imageName=$(find "$framespath" -type f | sort -R | tail -1)
shavedName="gray/"$(basename "$imageName")
printf "working with $imageName\r"
# detect image border:
increment=5
x=150
limitX=600
y=50
colorFuzz=.01
# borderColor="#f7d9ac"
borderColor="#ffffff"
while true
do
pixelColor=$(magick convert "$imageName" -crop 1x1+$x+$y -depth 8 txt:- | awk ' NR==2 {print $3}')
colorDiff=$(magick compare -metric RMSE xc:"$borderColor" xc:"$pixelColor" null: 2>&1 | sed "s/.*(\(.*\))/\1/")
# break condition success
echo "fuzz: $colorFuzz; diff: $colorDiff; point: $x:$y"
[ 1 -eq "$(echo "$colorFuzz > $colorDiff" | bc)" ] && echo "found border: $x:$y" \
&& magick convert "$imageName" -colorspace Gray -shave "${x}x0" "$shavedName" \
&& break
# break condition fail
[ "$x" -gt "$limitX" ] && echo "failed to find border" && break
# update point
x=$((x+increment))
done
# to functions
# cut left border
# cut right border
# assume position
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