#!/bin/sh 

for picture in `find -name "*.[jJ][pP][gG]"` 
do 
W=`identify -format "%w" $picture` 
H=`identify -format "%h" $picture` 

echo $picture
echo $W 
echo $H 
   if [ "$W" -gt "$H" ] 
        then 
                # echo "Horizontal" 
                convert -resize '800x600>' ${picture} small-"${picture##*/}"
        else 
                # echo "Vertical" 
                convert -resize '600x800>' ${picture} small-"${picture##*/}"
        fi 
done