#!/bin/bash

resize_image() {
    img="$1"
    # Get image dimensions
    dimensions=$(identify -format "%wx%h" "$img")
    width=$(echo $dimensions | cut -dx -f1)
    height=$(echo $dimensions | cut -dx -f2)
    
    # Calculate new dimensions
    if (( width < height )); then
        new_dim="1024x"
    else
        new_dim="x1024"
    fi
    
    # Resize image with new dimensions
    convert "$img" -resize "$new_dim" -filter Lanczos -antialias "${img%.*}_resized.png"
}
export -f resize_image

find /path/to/source/ | parallel -j$(nproc) resize_image {}