4) individual embedded images

The following script extracts each individual image embedded in a PDF document and displays them. As documented in the script, it is based on a tool I recently became aware of from a "Tech Tip" in Linux Journal. The tool, pdfimages, extracts the individual images from the PDF document, which are then viewed using zgv. I call this script 'pdfimagesview'.

---

#!/bin/bash  -


# ############## security pack ##############################

PATH='/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/usr/local/sbin:/usr/local/bin:/usr/games:~/bin'  ;


hash -r  ;
#  -  Bash Cookbook, 1st ed.,, #14.5

ulimit  -H -c 0 --  ;
#  -  Bash Cookbook, 1st ed.,, #14.6

IFS=$' \t\n'  ;
#  -  Bash Cookbook, 1st ed.,, #14.7

UMASK='002'  ;
umask  $UMASK  ;
#  -  Bash Cookbook, 1st ed.,, #14.8

\unalias -a
#  -  Bash Cookbook, 1st ed.,, #14.4

# ############## security pack ##############################

USAGE="$0  -h | file.pdf | file.ps  [ startpage# [ endpage# ] ]"  ;

VERSION='$Id: pdfimagesview,v 1.1 2008/07/08 09:20:30 dallas Exp dallas $'  ;

set -e  ;
shopt -s  nocasematch    expand_aliases  ;

alias RM='/bin/rm  -f   2> /dev/null '  ;
alias RMDIR='/bin/rmdir 2> /dev/null '  ;
alias MKDIR='/bin/mkdir 2> /dev/null '  ;
alias PDFIMAGES='/usr/bin/pdfimages'  ;
alias EZGV='exec   /usr/bin/zgv'  ;
#  alias ZGV='/usr/bin/zgv'  ;

#  pdfimages is from the poppler-utils package,
#  referenced in 'Linux Journal' May, 2008, p. 83, Tech Tip
#  'Extract Images from PDF Files', Matthew Martin.
#  It extracts the images from a pdf file


THEPDFFILE=${1}  ;

case  ${THEPDFFILE}  in
[-/][h?]* )
  echo 'Usage: '${USAGE}  ;
  exit  ;
  ;;
[-/]v* )
  echo ${VERSION}  ;
  exit  ;
  ;;
*.ps )
  THETTAG=${THEPDFFILE%.ps}  ;
  ;;
*.pdf )
  THETAG=${THEPDFFILE%.pdf}  ;
  ;;
* )
  exit  ;
esac

if [ ! -f ${THEPDFFILE} ]  ; then
   echo 'File needed'  ;
   echo ${USAGE}  ;
   exit  ;
fi

if [[  ${THETAG} == */* ]] ; then
  THETAG=${THETAG##*/}  ;
  fi  ;

THEDIR1='/tmp/pdfimages'  ;
THEDIR2="${THEDIR1}/${THETAG}"  ;
THEFILES="${THEDIR2}/${THETAG}"  ;

for ii in ${!THEDIR*}
do
if [ ! -d ${!ii}  ] ; then
  RM      ${!ii}  ;
  MKDIR   ${!ii}  ;
fi  ;
done  ;

RM  ${THEDIR2}/*  ;

PDFIMAGES -f ${2:-1} -l ${3:-200}  ${THEPDFFILE} ${THEFILES}  ;

EZGV  --visual ${THEDIR2}/   ;



exit