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

Create headers:

First run in images:

for i in *.jpg
do convert -quality 95 -geometry x800 $i /tmp/beach_originals/`basename $i .jpg`.jpg;
done

Thereafter:

#!/bin/bash

PROCESSED=/tmp/beach_processed

for I in *.jpg; do
echo -n "$I..."
convert -quality 85 -crop 800x350+0+0 -gravity Center $I ${PROCESSED}/${I}
echo cropped
done


Thereafter renamed all including header string:
for f in *.jpg; do mv $f `basename $f .jpg`_header.jpg; done;