Notes

for i in *.jpg
do convert -quality 80 -geometry 400x300! $i /tmp/beach_processed/`basename $i .jpg`.jpg;
done

for i in *.tif
do convert -quality 80 -geometry 400x300! $i /tmp/beach_processed/`basename $i .tif`.jpg;
done

for i in *.jpg
do convert -quality 75 -geometry 100x78! $i /tmp/beach_processed/`basename $i .jpg`_thumb.jpg;
done