Export Layers as PDF

I found this script for making PDF files with searchable OCR over at http://blog.konradvoelkel.de/2010/01/linux-ocr-and-pdf-problem-solved. It would be awesome to somehow have this integrated into this plugin!


#!/bin/bash
echo "usage: pdfocr.sh document.pdf orientation split left top right bottom lang author title"
# where orientation is one of 0,1,2,3, meaning the amount of rotation by 90°
# and split is either 0 (already single-paged) or 1 (2 book-pages per pdf-page)
# and (left top right bottom) are the coordinates to crop (after rotation!)
# and lang is a language as in "cuneiform -l".
# and author,title are used for the PDF metadata
# all values relative to a resolution of 300dpi
#
# usage examples:
# ./pdfocr.sh SomeFile.pdf 0 0 0 0 2500 2000 ger SomeAuthor SomeTitle
# will process a PDF with one page per pdf-page, cropping to width 2500 and height 2000
pdftk "$1" burst dont_ask
for f in pg_*.pdf
do
echo "pre-processing $f ..."
convert -quiet -rotate $[90*$2] -monochrome -normalize -density 300 "$f" "$f.png"
convert -quiet -crop $6x$7+$4+$5 "$f.png" "$f.png"
if [ "1" = "$3" ];
then
convert -quiet -crop $[$6/2]x$7+0+0 "$f.png" "$f.1.png"
convert -quiet -crop 0x$7+$[$6/2]+0 "$f.png" "$f.2.png"
rm -f "$f.png"
else
echo no splitting
fi
rm -f "$f"
done
for f in pg_*.png
do
echo "processing $f ..."
convert "$f" "$f.bmp"
cuneiform -l $8 -f hocr -o "$f.hocr" "$f.bmp"
convert -blur 0.4 "$f" "$f.bmp"
hocr2pdf -i "$f.bmp" -s -o "$f.pdf" < "$f.hocr" rm -f "$f" "$f.bmp" "$f.hocr" done echo "InfoKey: Author" > in.info
echo "InfoValue: $9" >> in.info
echo "InfoKey: Title" >> in.info
echo "InfoValue: $10" >> in.info
echo "InfoKey: Creator" >> in.info
echo "InfoValue: PDF OCR scan script" >> in.info
pdfjoin --fitpaper --tidy --outfile "$1.ocr1.pdf" "pg_*.png.pdf"
rm -f pg_*.png.pdf
pdftk "$1.ocr1.pdf" update_info doc_data.txt output "$1.ocr2.pdf"
pdftk "$1.ocr2.pdf" update_info in.info output "$1-ocr.pdf"
rm -f "$1.ocr1.pdf" "$1.ocr2.pdf" doc_data.txt in.info
rm -rf pg_*_files


On GIMP 2.6.11 on Mac OS X Mountain Lion, I get this error (and additionally, the dialog seems odd in that it forces me to pick a file name from a file browser, when what I wish to do is save the file as a new file):

Traceback (most recent call last):
File "/tmp/skl/Gimp.app/Contents/Resources/lib/gimp/2.0/python/gimpfu.py", line 692, in response
dialog.res = run_script(params)
File "/tmp/skl/Gimp.app/Contents/Resources/lib/gimp/2.0/python/gimpfu.py", line 353, in run_script
return apply(function, params)
File "/tmp/skl/Gimp.app/Contents/Resources/lib/gimp/2.0/plug-ins/export_layers_pdf-0.2.py", line 52, in export_layers
combine_imgs_into_pdf(imgfiles, pdfname)
File "/tmp/skl/Gimp.app/Contents/Resources/lib/gimp/2.0/plug-ins/export_layers_pdf-0.2.py", line 32, in combine_imgs_into_pdf
check_call(['convert'] + imgfiles + [pdfname])
File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/subprocess.py", line 457, in check_call
retcode = call(*popenargs, **kwargs)
File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/subprocess.py", line 444, in call
return Popen(*popenargs, **kwargs).wait()
File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/subprocess.py", line 594, in __init__
errread, errwrite)
File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/subprocess.py", line 1097, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory

WindowsError: [Error 32] The process cannot access the file because it is being used by another process: 'c:\\docume~1\\compaq~1.fam\\locals~1\\temp\\tmpzaxus7.tiff'

Trace back

Traceback (most recent call last):
File "C:\Program Files\GIMP-2.0\lib\gimp\2.0\python\gimpfu.py", line 692, in response
dialog.res = run_script(params)
File "C:\Program Files\GIMP-2.0\lib\gimp\2.0\python\gimpfu.py", line 353, in run_script
return apply(function, params)
File "C:\Documents and Settings\Compaq_Owner.FAMILY-ROOM\.gimp-2.6\plug-ins\export_layers_pdf-0.1.py", line 55, in export_layers
os.remove(img)
WindowsError: [Error 32] The process cannot access the file because it is being used by another process: 'c:\\docume~1\\compaq~1.fam\\locals~1\\temp\\tmpuna0eg.tiff'

I noticed the file is associated with XnView.I tried to re-associate it with Imagemagick but got another error.