#!/bin/csh -f
set last="__xxx__"
foreach in ( out-*.jpg )
	set base=`echo $in | sed -e 's/\.jpg//'`
	djpeg -gray -pnm "$base".jpg > "$base".pgm
	if ( -f "$last".pgm ) then
		pnmarith -absdiff "$base".pgm "$last".pgm > "$base"-diff.pgm
	endif
	set last=$base
end
