Create Images from PDF and recreate PDF from Images...

user@machine:~$ tiff2pdf
LIBTIFF, Version 4.0.6
Copyright (c) 1988-1996 Sam Leffler
Copyright (c) 1991-1996 Silicon Graphics, Inc.

usage:  tiff2pdf [options] input.tiff
options:
 -o: output to file name
 -j: compress with JPEG
 -z: compress with Zip/Deflate
 -q: compression quality
 -n: no compressed data passthrough
 -d: do not compress (decompress)
 -i: invert colors
 -u: set distance unit, 'i' for inch, 'm' for centimeter
 -x: set x resolution default in dots per unit
 -y: set y resolution default in dots per unit
 -w: width in units
 -l: length in units
 -r: 'd' for resolution default, 'o' for resolution override
 -p: paper size, eg "letter", "legal", "A4"
 -F: make the tiff fill the PDF page
 -f: set PDF "Fit Window" user preference
 -e: date, overrides image or current date/time default, YYYYMMDDHHMMSS
 -c: sets document creator, overrides image software default
 -a: sets document author, overrides image artist default
 -t: sets document title, overrides image document name default
 -s: sets document subject, overrides image image description default
 -k: sets document keywords
 -b: set PDF "Interpolate" user preference
 -h: usage

user@machine:~$ gs
GPL Ghostscript 9.19 (2016-03-23)
Copyright (C) 2016 Artifex Software, Inc.  All rights reserved.
This software comes with NO WARRANTY: see the file PUBLIC for details.
GS>

#!/bin/bash
# pdf_to_image, prints PDF to one of the supported image formats.
# Needs Ghostscript and YAD.
# Calls Ghostscript to create image-files from PDF
#
# This script ©2016 Michael Uplawski <michael.uplawski@uplawski.eu>
# Use at your own risk, modify as you please
#
# Ghostscipt is ©2015 Artifex Software, Inc.  All rights reserved.

GS=`which gs`

# verification and error-handling: Ghostscript not found
if [ ! $GS ]
then
   yad --image "dialog-error" --title="Error" --window-icon="" --text="Ghostscript is needed but cannot be found! Make sure that it is installed!"
   exit 1
fi
DEF_FORMAT="TIF"
FORMATS="^TIF;JPEG;PGM;PNG;PCX;BMP"
SEP=";"
PAPER=a4

DONE=0
while [ "$DONE" -eq 0 ]
do

   # Create the YAD user-interface, retrieve values.
   VALUES=($(yad --title="pictures from PDF" --image="PDFImage" --window-icon="PDFImage" --form --separator=' ' --item-separator="$SEP" --field="PDF-file(s)":MFL ' ' --field="Output format":CB "$FORMATS" --field="Resolution":NUM "400;180..600;10" ))

   echo "VALUES is ${VALUES[@]}"
   # verification and error-handling
   if [ ! "${VALUES}" ]
   then
      exit 0
   fi

   if [ 1 -ge "${#VALUES[@]}" ]
   then
      yad --image "dialog-error" --window-icon="PDFImage" --title="No PDF files" --text="No files have been selected. Aborting."
      exit 2
   fi

   PDFS=($(echo ${VALUES[0]} | tr "$SEP" ' '))
   # echo "PDFS is ${PDFS} (${#PDFS[@]})"
   FORMAT=${VALUES[1]}
   RES=${VALUES[2]}

   # No picture-files (or just anything) found in the array.
   if [ 0 -eq "${#PDFS[@]}" ]
   then
      yad --image "dialog-error" --window-icon="PDFImage" --title="no pdf files" --text="No files have been selected. Aborting."
      exit 2
   fi

   case "$FORMAT" in
      TIF)
         TYPE=tif
         DEV=tiff24nc
         ;;
      JPEG)
         TYPE=jpg
         DEV=jpeg
         ;;
      PGM)
         TYPE=pgm
         DEV=pgm
         ;;
      PNG)
         TYPE=png
         DEV=png48
         ;;
      PCX)
         TYPE=pcx
         DEV=pcx24b
         ;;
      BMP)
         TYPE=bmp
         DEV=bmp256
         ;;
   esac
   result=""
   for inf in "${PDFS[@]}"
   do
      # echo "PDF: $inf"
      if [ ! -f "$inf" ]
      then
         yad --image "dialog-error" --window-icon="PDFImage" --title="unsuitable file" --text="$inf is not a valid PDF-file."
         continue
      fi
      DIR=`dirname "$inf"`
      # echo "DIR is $DIR"
      ext=${inf/*./}
      if [ "$DIR" == '' ]
      then
         DIR='.'
      fi
      OUTPUT="$DIR"/`basename "$inf" ."$ext"`_%04d."$TYPE"
      OP="$DIR"/`basename "$inf" ."$ext"`"*"."$TYPE"
      # echo "creating files $OUTPUT"   
      # /usr/bin/gs -SDEVICE="$DEV" -r"$RES" -sPAPERSIZE="$PAPER" -sOutputFile="$OUTPUT" -dNOPAUSE -dBATCH -- "$inf"
      result="$result\n---------\n$inf:\n---------\n"$("$GS" -SDEVICE="$DEV" -r"$RES"x"$RES" -sPAPERSIZE="$PAPER" -sOutputFile="$OUTPUT" -dNOPAUSE -- "$inf")
      result="$result\n"$(ls -gGh $OP | cut -d' ' -f3-13)
      DONE=1
   done

   if [ $DONE -gt 0 ]
   then
      # All done ... maybe
      echo -e "$result" | yad --image "dialog-information" --title="pdf2"$TYPE" Conversion done" --window-icon="PDFImage" --text-info --text="All done:\n" --width="600" --height="400"
   else
      yad --image "dialog-warning" --title="problem" --window-icon="PDFImage" --text="Verify your choices. Could not convert a single file!"

   fi
done

#!/bin/bash
# tiff_to_pdf - creates PDF ffrom Tiff(s).
# ©2015-2016 Michael Uplawski <michael.uplawski@uplawski.eu>
# Needs YAD, libtiff
# -----------> 3 Variables for you to set <-------------
AUTHOR="Der wo das PDF macht <pdf_macher@email_provider.tld>"
PAGE="A4"
READER="/usr/bin/acroread"
# <--------------- Nothing to do below this ----------->

ISEP=";"
FSEP="|"

values=($(yad --title="Tiff to PDF" --window-icon="PDFImage" --image="PDFImage" --form --separator="$FSEP" --item-separator="$ISEP" --field='Tiff-Files':MFL "" --field='resulting PDF-File':SFL "" --field='open PDF?':CHK TRUE --field="PDF open command" "$READER"))
echo "$values"
READER=$(echo $values | cut -d"$FSEP" -f4)
OPEN=$(echo $values | cut -d"$FSEP" -f3)
PDF=$(echo $values | cut -d"$FSEP" -f2)

files=$(echo $values | cut -d"$FSEP" -f1 | tr "$ISEP" " ")

for f in ${files}
do
   if [ ! -f "$f" ]
   then
      echo "$f is not a valid file"
   fi
done
TFILE=`mktemp`
echo "TFILE is $TFILE"
/usr/bin/tiffcp ${files[@]} "$TFILE"
/usr/bin/tiff2pdf -z -a"$AUTHOR" -p"$PAGE" "$TFILE" -o "$PDF"
if [ -f "$PDF" ]
then
   if [ TRUE == "$OPEN" ]
   then
      `"$READER" "$PDF"`   
   fi
fi

unlink "$TFILE"