#!/bin/bash

[ -d medtmp ] || mkdir medtmp

find -maxdepth 1 -iname "*.jpg" -exec \
    convert {} -resize 1600x1600\> -quality 80 -verbose medtmp/{} \;

find -maxdepth 1 -iname "*.jpg" -exec \
    chown medtmp/{} --reference={} \;