Sort Digital Photos

Over the years I have collected thousands of digital photos from birthday parties, events etc. Having only a 64MB in my Sony Memory Stick it gets filled up very fast even at 600x480 resolution which is the lowest setting. Its become a habit dumping the pictures onto a new folder on my hard drive every now and then. After trying to sort the mess manually to try to organize the photos chronologically I managed to lose the one most important piece of information, the datestamp when the image was originally taken. Apparently when you do a copy in bash it does not preserve the datestamp instead it overwrites it with the one at which time the file was copied. Had I used the -a switch with copy I wouldn't be in this mess.
Fortunately there was still hope. I discovered that all jpegs included header information which contains the original datestamp as well as some other things that I wasn't interested in.

This lead me to write a simple bash script to extract the datestamp and sort the pictures chronologically in my album.

Here is the pseudo code:
*accept minimum 2 arguments the path_to_images path_to_write_location recursive_flag
*parse the date string from the jpeg
*loop thru all the images
*if write location does not exist create it
*construct a directory structure to place the images in the format Year/Month
*if format directory structure does not exists create it
*otherwise check if the file name exists in that directory so that we dont overwrite it
*if it does rename it before we copy it to the destination folder

Here is the entire code:

#!/bin/bash
#filename: chronJpg.sh
#Date: Feb 17 2007
#Author: Dejan Tolj 
#License: GPL
#
#Bash script to arrange jpeg images chronologically
#
#Usefull when original picture taken date has not been preserved by
#accidentally coping without the -a option.

which identify &>/dev/null
if [ $? != "0" ];
then
 echo -e "identify not found, please install ImageMagick. http://imagemagick.com";
 exit 0
fi

restoreDateStamp(){
#  echo "Date stamp =$1"
#  echo $1 | tr -d [:space:][:punct:] |touch -t /{} $2
 date=`echo $1|cut -d: -f 1-4|tr -d [:space:][:punct:]` #2005:05:18 13:50:66

 touch -t $date $2
#  echo "Touch $date ->$2"
}

Month[1]="Jan"
Month[2]="Feb"
Month[3]="Mar"
Month[4]="Apr"
Month[5]="May"
Month[6]="Jun"
Month[7]="Jul"
Month[8]="Aug"
Month[9]="Sep"
Month[10]="Oct"
Month[11]="Nov"
Month[12]="Dec"

#parameters: jpg_path, write_location, recursive copy(optional)
PARAMSIZE=2

if [ $# -lt "$PARAMSIZE" ];
then
 echo "Enter the path to your jpeg files and the write location"
 echo `basename $0` "[path] [write_location] -r"
else
 #get first parameter
 jpg_path=$1
 #  echo $jpg_path
 #get second parameter
 write_location=$2
 #echo $write_location
 #get third parameter if present else search in current folder only
 if [ "$3" = "-r" ]; then
   echo "$3"
   recursive=""
 else
   recursive="-maxdepth 1"
   echo "$recursive"
 fi

 #Loop thru all jpegs and find the original date
 for i in $( find $jpg_path $recursive -iname \*.jpg );
 do
   original_date=`identify -verbose $i |grep "Date Time Original"|awk '{print $4, $5}'`
   #echo "OD=$original_date"

   #Get Original year
   original_year=`echo $original_date|cut -d: -f1`
   #echo "OY=$original_year"

   #Get Original month
   original_month=`echo $original_date|cut -d: -f2`
   #optionaly change date stamp
 
   if [ ! -d "$write_location" ];
   then
     mkdir "$write_location"
   fi

   mydir="$write_location/$original_year/${Month[original_month]}"
   filename=`basename $i` #strip the name of the image


   if [ ! -d $mydir ];
   then
     #   echo "Original month =$original_month"

     mkdir -p $mydir
     cp $i $mydir
     #Optionally change the date stamp
     #restoreDateStamp "$original_date" "$mydir/$filename"
   else
     #check name
     if [ -f "$mydir/$filename" ];
     then
       echo "Renaming duplicate file"
       if [ -f "$mydir/$filename"_$count ];
       then
         count=`ls $mydir/$filename_* |tail -1|cut -d_ -f2|tr -d [:alpha:][:punct:]`
         count=$[$count+1]
       else
         count=0
       fi
       #rename
       cp $i "$mydir/$filename"_$count
     else
       cp $i $mydir
     fi
     #restoreDateStamp "$original_date" "$mydir/$filename"
   fi

   echo "$i -> $mydir";
 done
fi


exit 0