jpg2png watcher script

jpg2png.sh

#!/bin/bash

# Cleanup product images
# This will convert images from JPG to PNG and replace the white
# background with transparent one.
#
# SEEDED GPT4 a copy of the script from http://tech.natemurray.com/2007/12/convert-white-to-transparent.html

# Set source folder and extension
SRC_EXT=jpg
DST_EXT=png
TRACKER_FILE=".image_tracker"

# This is where all the conversion happens
function removeBackground {
    SRC=$1
    DST=$2

    # Fuzzy percentage level for white color
    FUZZ=1

    convert "$SRC" \( +clone -fx 'p{0,0}' \) -compose Difference -composite -modulate 100,0 +matte difference.png
    convert difference.png -bordercolor white -border 1x1 -matte -fill none -fuzz ${FUZZ}% -draw 'matte 1,1 floodfill' -shave 1x1 removed_black.png
    convert removed_black.png -channel matte -separate +matte matte.png
    convert matte.png -blur 0x1 matte-negated.png
    composite -compose CopyOpacity matte-negated.png "$SRC" "$DST"
    rm -f difference.png removed_black.png matte.png matte-negated.png
}

function process_directory {
    SRC_FOLDER=$1

    if [ ! -f "${SRC_FOLDER}/${TRACKER_FILE}" ]; then
        touch "${SRC_FOLDER}/${TRACKER_FILE}"
    fi

    for FILE in "${SRC_FOLDER}"/*.${SRC_EXT}
    do
        if [ -f "$FILE" ] && ! grep -q "$FILE" "${SRC_FOLDER}/${TRACKER_FILE}"; then
            echo Converting $FILE
            NEWFILE="${SRC_FOLDER}/$(basename "$FILE" .${SRC_EXT}).${DST_EXT}"
            removeBackground "$FILE" "$NEWFILE"
            echo "$FILE" >> "${SRC_FOLDER}/${TRACKER_FILE}"
        fi
    done

    for SUBFOLDER in "${SRC_FOLDER}"/*; do
        if [ -d "$SUBFOLDER" ]; then
            process_directory "$SUBFOLDER"
        fi
    done
}

# Check if a folder path is provided
if [ -z "$1" ]; then
    echo "Usage: $0 [folder_path]"
    exit 1
fi

# Start processing the provided folder and its subfolders
WATCH_FOLDER="$1"
process_directory "$WATCH_FOLDER"

# Watch the folder and its subfolders for new files
fswatch -r -e ".*" -i "\\.${SRC_EXT}$" "$WATCH_FOLDER" | while read -r FILE; do
    DIR=$(dirname "$FILE")
    process_directory "$DIR"
done