#!/usr/local/bin/bash -x

for img in `ls *.jpg`
do
#  convert -sample 25%x25% $img thumb-$img
  convert -sample 256 -quality 90 $img thumb-$img
done

for img in `ls *.JPG`
do
  convert -sample 256 -quality 90 $img thumb-$img
done

mkdir TN
mv thumb* ./TN/