Convert, resize and paint images from JPG to PNG using imagemagick

convert-jpg-png.sh

#!/bin/bash

set -e

if [ "$1" == "" ] || [ ! -d "$1" ]; then
	echo "Invalid Path $1"
	exit 1
fi

LC_NUMERIC="en_US.UTF-8"

function timerelative {
	local T=$(printf "%.0f" $1)
	local D=$(( $T / 60 / 60 / 24 ))
	local H=$(( $T / 60 / 60 % 24 ))
	local M=$(( $T / 60 % 60 ))
	local S=$(( $T % 60 ))

	printf '%02dd %02dh %02dm %02ds' "$D" "$H" "$M" "$S"
}

function progress {
	COUNT=$(( $COUNT + 1 ))

	local NOW=$(date +%s.%3N)
	local TIME=$(echo "$NOW - $START" | bc -l)
	local AVG=$(echo "$TIME / $COUNT" | bc -l)
	local MAX=$(echo "$AVG * $TOTAL" | bc -l)
	local FINISH=$(echo "$MAX - $TIME" | bc -l)
	local CURRENT=$(echo "$NOW - $MICRO" | bc -l)

	AVG=$(printf "%.2f" $AVG)
	CURRENT=$(printf "%.2f" $CURRENT)

	echo ""
	echo -n "[$(date +"%F %T")] "
	echo -n "[$(printf "%0${ZEROS}d" $COUNT) / $TOTAL] "
	echo -n "[TOTAL $(timerelative $MAX)] "
	echo -n "[ELAPSED $(timerelative $TIME)] "
	echo -n "[FINISH $(timerelative $FINISH)] "
	echo -n "[AVG ${AVG}s] "
	echo -n "[CURRENT ${CURRENT}s] "
	echo -n "$1"

	MICRO=$NOW
}

cd $1

TOTAL=0

echo -e "\n[$(date +"%F %T")] Calculate Total over $(ls *.jpeg | wc -l) files"

for jpg in *.jpeg; do
	png=$(echo $jpg | sed -e 's/jpeg/png/')
	step1=$(echo $jpg | sed -e 's/\.jpeg/-large.png/')
	step2=$(echo $jpg | sed -e 's/\.jpeg/-large-blur-1-paint-2.png/')

	if [ ! -f $png ]; then
		TOTAL=$(( $TOTAL + 1 ))
	fi

	if [ ! -f $step1 ]; then
		TOTAL=$(( $TOTAL + 1 ))
	fi

	if [ ! -f $step2 ]; then
		TOTAL=$(( $TOTAL + 1 ))
	fi
done

echo -e "\n[$(date +"%F %T")] Start Processing $TOTAL files"

COUNT=0
MICRO=0
START=$(date +%s.%3N)
ZEROS=${#TOTAL}

for jpg in *.jpeg; do
	if [ $COUNT == 0 ]; then
		MICRO=$(date +%s.%3N)
	fi

	png=$(echo $jpg | sed -e 's/jpeg/png/')
	step1=$(echo $jpg | sed -e 's/\.jpeg/-large.png/')
	step2=$(echo $jpg | sed -e 's/\.jpeg/-large-blur-1-paint-2.png/')

	if [ ! -f $png ]; then
		convert $jpg $png

		progress "[CONVERT] [FROM] $png [TO] $step1"
	fi

	if [ ! -f $step1 ]; then
		convert $png -filter point -resize 200% -unsharp 0x3+0.5+0 -resize 200% -unsharp 0x3+0.5+0 -strip $step1

		progress "[RESIZE] [FROM] $png [TO] $step1"
	fi

	if [ ! -f $step2 ]; then
		convert $step1 -blur 0x1 -paint 2 $step2

		progress "[PAINT] [FROM] $step1 [TO] $step2"
	fi
done

echo -e "\n[$(date +"%F %T")] Finish"

eog *large*.png

exit 0