root/gsdl/trunk/perllib/plugins/PagedImagePlugin.pm @ 18468

Revision 18468, 21.8 KB (checked in by davidb, 11 years ago)

call to ImageConverter::begin missing parameters. Now fixed

  • Property svn:executable set to *
  • Property svn:keywords set to Author Date Id Revision
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1###########################################################################
2#
3# PagedImagePlugin.pm -- plugin for sets of images and OCR text that
4#  make up a document
5# A component of the Greenstone digital library software
6# from the New Zealand Digital Library Project at the
7# University of Waikato, New Zealand.
8#
9# Copyright (C) 1999 New Zealand Digital Library Project
10#
11# This program is free software; you can redistribute it and/or modify
12# it under the terms of the GNU General Public License as published by
13# the Free Software Foundation; either version 2 of the License, or
14# (at your option) any later version.
15#
16# This program is distributed in the hope that it will be useful,
17# but WITHOUT ANY WARRANTY; without even the implied warranty of
18# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19# GNU General Public License for more details.
20#
21# You should have received a copy of the GNU General Public License
22# along with this program; if not, write to the Free Software
23# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24#
25###########################################################################
26
27# PagedImagePlugin
28# processes sequences of images, with optional OCR text
29#
30# This plugin takes *.item files, which contain metadata and lists of image
31# files, and produces a document containing sections, one for each page.
32# The files should be named something.item, then you can have more than one
33# book in a directory. You will need to create these files, one for each
34# document/book.
35#
36#There are two formats for the item files: a plain text format, and an xml
37#format. You can use either format, and can have both formats in the same
38#collection if you like. If you use the plain format, you must not start the
39#file off with <PagedDocument>
40
41#### PLAIN FORMAT
42# The format of the xxx.item file is as follows:
43# The first lines contain any metadata for the whole document
44# <metadata-name>metadata-value
45# eg.
46# <Title>Snail farming
47# <Date>19230102
48# Then comes a list of pages, one page per line, each line has the format
49#
50# pagenum:imagefile:textfile:r
51#
52# page num and imagefile are required. pagenum is used for the Title
53# of the section, and in the display is shown as page <pagenum>.
54# imagefile is the image for the page. textfile is an optional text
55# file containing the OCR (or any) text for the page - this gets added
56# as the text for the section. r is optional, and signals that the image
57# should be rotated 180deg. Eg use this if the image has been made upside down.
58# So an example item file looks like:
59# <Title>Snail farming
60# <Date>19960403
61# 1:p1.gif:p1.txt:
62# 2:p2.gif::
63# 3:p3.gif:p3.txt:
64# 3b:p3b.gif:p3b.txt:r
65# The second page has no text, the fourth page is a back page, and
66# should be rotated.
67#
68
69#### XML FORMAT
70# The xml format looks like the following
71#<PagedDocument>
72#<Metadata name="Title">The Title of the entire document</Metadata>
73#<Page pagenum="1" imgfile="xxx.jpg" txtfile="yyy.txt">
74#<Metadata name="Title">The Title of this page</Metadata>
75#</Page>
76#... more pages
77#</PagedDocument>
78#PagedDocument contains a list of Pages, Metadata and PageGroups. Any metadata
79#that is not inside another tag will belong to the document.
80#Each Page has a pagenum (not used at the moment), an imgfile and/or a txtfile.
81#These are both optional - if neither is used, the section will have no content.
82#Pages can also have metadata associated with them.
83#PageGroups can be introduced at any point - they can contain Metadata and Pages and other PageGroups. They are used to introduce hierarchical structure into the document.
84#For example
85#<PagedDocument>
86#<PageGroup>
87#<Page>
88#<Page>
89#</PageGroup>
90#<Page>
91#</PagedDocument>
92#would generate a structure like
93#X
94#--X
95#  --X
96#  --X
97#--X
98#PageGroup tags can also have imgfile/textfile metadata if you like - this way they get some content themselves.
99
100#Currently the XML structure doesn't work very well with the paged document type, unless you use numerical Titles for each section.
101#There is still a bit of work to do on this format:
102#* enable other text file types, eg html, pdf etc
103#* make the document paging work properly
104#* add pagenum as Title unless a Title is present?
105
106# All the supplemetary image amd text files should be in the same folder as
107# the .item file.
108#
109# To display the images instead of the document text, you can use [srcicon]
110# in the DocumentText format statement.
111# For example,
112#
113# format DocumentText "<center><table width=_pagewidth_><tr><td>[srcicon]</td></tr></table></center>"
114#
115# To have it create thumbnail size images, use the '-create_thumbnail' option.
116# To have it create medium size images for display, use the '-create_screenview'
117# option. As usual, running
118# 'perl -S pluginfo.pl PagedImagePlugin' will list all the options.
119
120# If you want the resulting documents to be presented with a table of
121# contents, use '-documenttype hierarchy', otherwise they will have
122# next and previous arrows, and a goto page X box.
123
124# If you have used -create_screenview, you can also use [screenicon] in the format
125# statement to display the smaller image.  Here is an example  that switches
126# between the two:
127#
128# format DocumentText "<center><table width=_pagewidth_><tr><td>{If}{_cgiargp_ eq full,<a href='_httpdocument_&d=_cgiargd_&p=small'>Switch to small version.</a>,<a href='_httpdocument_&d=_cgiargd_&p=full'>Switch to fullsize version</a>}</td></tr><tr><td>{If}{_cgiargp_ eq full,<a href='_httpdocument_&d=_cgiargd_&p=small' title='Switch to small version'>[srcicon]</a>,<a href='_httpdocument_&d=_cgiargd_&p=full' title='Switch to fullsize version'>[screenicon]</a>}</td></tr></table></center>"
129#
130# Additional metadata can be added into the .item files, alternatively you can
131# use normal metadata.xml files, with the name of the xxx.item file as the
132# FileName (only for document level metadata).
133
134package PagedImagePlugin;
135
136use ReadXMLFile;
137use ReadTextFile;
138use ImageConverter;
139
140use strict;
141no strict 'refs'; # allow filehandles to be variables and viceversa
142
143sub BEGIN {
144    @PagedImagePlugin::ISA = ('ReadXMLFile', 'ReadTextFile', 'ImageConverter');
145}
146
147my $type_list =
148    [ { 'name' => "paged",
149        'desc' => "{PagedImagePlugin.documenttype.paged}" },
150      { 'name' => "hierarchy",
151        'desc' => "{PagedImagePlugin.documenttype.hierarchy}" } ];
152
153my $arguments =
154    [ { 'name' => "process_exp",
155    'desc' => "{BasePlugin.process_exp}",
156    'type' => "string",
157    'deft' => &get_default_process_exp(),
158    'reqd' => "no" },
159      { 'name' => "block_exp",
160    'desc' => "{BasePlugin.block_exp}",
161    'type' => "string",
162    'deft' => &get_default_block_exp(),
163    'reqd' => "no" },
164      { 'name' => "title_sub",
165    'desc' => "{HTMLPlugin.title_sub}",
166    'type' => "string",
167    'deft' => "" },
168      { 'name' => "headerpage",
169    'desc' => "{PagedImagePlugin.headerpage}",
170    'type' => "flag",
171    'reqd' => "no" },
172      { 'name' => "documenttype",
173    'desc' => "{PagedImagePlugin.documenttype}",
174    'type' => "enum",
175    'list' => $type_list,
176    'deft' => "paged",
177    'reqd' => "no" } ];
178
179
180my $options = { 'name'     => "PagedImagePlugin",
181        'desc'     => "{PagedImagePlugin.desc}",
182        'abstract' => "no",
183        'inherits' => "yes",
184        'args'     => $arguments };
185
186sub new {
187    my ($class) = shift (@_);
188    my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
189    push(@$pluginlist, $class);
190
191    push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
192    push(@{$hashArgOptLists->{"OptList"}},$options);
193   
194    my $imc_self = new ImageConverter($pluginlist, $inputargs, $hashArgOptLists);
195    my $rtf_self = new ReadTextFile($pluginlist, $inputargs, $hashArgOptLists, 1);
196    my $rxf_self = new ReadXMLFile($pluginlist, $inputargs, $hashArgOptLists);
197
198    my $self = BasePlugin::merge_inheritance($imc_self,$rtf_self,$rxf_self);
199
200    # Update $self used by XML::Parser so it finds callback functions
201    # such as start_document here and not in ReadXMLFile (which is what
202    # $self was when new XML::Parser was done)
203    #
204    # If the $self returned by this constructor is the same as the one
205    # used in ReadXMLFile (e.g. in the GreenstoneXMLPlugin) then this step isn't necessary
206    #
207    # Consider embedding this type of assignment into merge_inheritance
208    # to help catch all cases?
209
210    $rxf_self->{'parser'}->{'PluginObj'} = $self;
211
212    return bless $self, $class;
213}
214
215
216sub init {
217    my $self = shift (@_);
218    my ($verbosity, $outhandle, $failhandle) = @_;
219
220    $self->SUPER::init(@_);
221    $self->ImageConverter::init();
222}
223
224sub begin {
225    my $self = shift (@_);
226    my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
227
228    $self->SUPER::begin(@_);
229    $self->ImageConverter::begin(@_);
230}
231
232sub get_default_process_exp {
233    my $self = shift (@_);
234
235    return q^\.item$^;
236}
237
238sub get_doctype {
239    my $self = shift(@_);
240   
241    return "PagedDocument";
242}
243
244
245# want to block everything except the .item ones
246# but instead we will block images and txt files
247sub get_default_block_exp {
248    my $self = shift (@_);
249   
250    return q^(?i)(\.jpe?g|\.gif|\.png|\.tif?f|\.te?xt|\.html?|~)$^
251###    return q^(?i)(\.jpe?g|\.gif|\.png|\.tif?f|\.te?xt|\.html?|\.css|\.opd|\.pdf|~)$^
252}
253
254
255# want to use BasePlugin's version of this, not ReadXMLFile's
256sub can_process_this_file {
257    my $self = shift(@_);
258   
259    return $self->BasePlugin::can_process_this_file(@_);
260}
261
262# we want to use BasePlugin's read, not ReadXMLFile's
263sub read
264{
265    my $self = shift (@_);
266
267    $self->BasePlugin::read(@_);
268}
269
270
271
272sub read_into_doc_obj {
273    my $self = shift (@_);
274    my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
275    my $outhandle = $self->{'outhandle'};
276    my $verbosity = $self->{'verbosity'};
277   
278    my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
279
280    print $outhandle "PagedImagePlugin processing \"$filename_full_path\"\n"
281    if $verbosity > 1;
282    print STDERR "<Processing n='$file' p='PagedImagePlugin'>\n" if ($gli);
283   
284   
285    # here we need to decide if we have an old text .item file, or a new xml
286    # .item file
287    my $xml_version = $self->is_xml_item_file($filename_full_path);
288
289    $self->tidy_item_file($filename_full_path);
290   
291    my $doc_obj;
292    if ($xml_version) {
293    # careful checking needed here!! are we using local xml handlers or super ones
294    $self->ReadXMLFile::read($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli);
295    $doc_obj = $self->{'doc_obj'};
296    } else {
297    my ($dir);
298    ($dir, $file) = $filename_full_path =~ /^(.*?)([^\/\\]*)$/;
299
300    #process the .item file
301    $doc_obj = $self->process_item($filename_full_path, $dir, $file, $processor);
302   
303    }
304
305    my $section = $doc_obj->get_top_section();
306       
307    $doc_obj->add_utf8_metadata($section, "Plugin", "$self->{'plugin_type'}");
308    $doc_obj->add_metadata($section, "FileFormat", "PagedImage");
309
310    # include any metadata passed in from previous plugins
311    # note that this metadata is associated with the top level section
312    $self->add_associated_files($doc_obj, $filename_full_path);
313    $self->extra_metadata ($doc_obj, $section, $metadata);
314    $self->auto_extract_metadata ($doc_obj);
315
316    # if we haven't found any Title so far, assign one
317    $self->title_fallback($doc_obj,$section,$filename_no_path);
318
319    $self->add_OID($doc_obj);
320    return (1,$doc_obj);
321}
322
323# for now, the test is if the first non-empty line is <PagedDocument>, then its xml
324sub is_xml_item_file {
325    my $self = shift(@_);
326    my ($filename) = @_;
327
328    my $xml_version = 0;
329    open (ITEMFILE, $filename) || die "couldn't open $filename\n";
330   
331    my $line = "";
332    my $num = 0;
333    $line = <ITEMFILE>;
334    while ($line !~ /\w/) {
335    $line = <ITEMFILE>;
336    }
337    chomp $line;
338    if ($line =~ /<PagedDocument/) {
339    $xml_version = 1;
340    }
341    close ITEMFILE;
342    return $xml_version;
343}
344
345sub tidy_item_file {
346    my $self = shift(@_);
347    my ($filename) = @_;
348
349    open (ITEMFILE, $filename) || die "couldn't open $filename\n";
350    my $backup_filename = "backup.item";
351    open (BACKUP,">$backup_filename")|| die "couldn't write to $backup_filename\n";
352    my $line = "";
353    $line = <ITEMFILE>;
354    $line =~ s/^\xEF\xBB\xBF//; # strip BOM
355    $line =~ s/\x0B+//ig;
356    $line =~ s/&/&amp;/g;
357    print BACKUP ($line);
358    #Tidy up the item file some metadata title contains \vt-vertical tab
359    while ($line = <ITEMFILE>) {
360    $line =~ s/\x0B+//ig;
361    $line =~ s/&/&amp;/g;
362    print BACKUP ($line);
363    }
364    close ITEMFILE;
365    close BACKUP;
366    &File::Copy::copy ($backup_filename, $filename);
367    &util::rm($backup_filename);
368
369}
370
371sub rotate_image {
372    my $self = shift (@_);
373    my ($filename_full_path) = @_;
374   
375    my ($this_filetype) = $filename_full_path =~ /\.([^\.]*)$/;
376    my $result = $self->convert($filename_full_path, $this_filetype, "-rotate 180", "ROTATE");
377    my ($new_filename) = ($result =~ /=>(.*\.$this_filetype)/);
378    if (-e "$new_filename") {
379    return $new_filename;
380    }
381    # somethings gone wrong
382    return $filename_full_path;
383
384}
385
386sub process_image {
387    my $self = shift(@_);
388    my ($filename_full_path, $filename_no_path, $doc_obj, $section, $rotate) = @_;
389    # do rotation
390    if  ((defined $rotate) && ($rotate eq "r")) {
391    # check the filenames
392    return 0 if ($filename_no_path eq "" || !-f $filename_full_path);
393
394    # we get a new temporary file which is rotated
395    $filename_full_path = $self->rotate_image($filename_full_path);
396    }
397   
398    # do generate images
399    my $result = 0;
400    if ($self->{'image_conversion_available'} == 1) {
401    # do we need to convert $filename_no_path to utf8? We are already reading in from a file, what encoding is it in???
402    $result = $self->generate_images($filename_full_path, $filename_no_path, $doc_obj, $section);
403    }
404    #overwrite one set in ImageConverter
405    $doc_obj->set_metadata_element ($section, "FileFormat", "PagedImage");
406    return $result;
407}
408
409
410sub xml_start_tag {
411    my $self = shift(@_);
412    my ($expat, $element) = @_;
413    $self->{'element'} = $element;
414   
415    my $doc_obj = $self->{'doc_obj'};
416    if ($element eq "PagedDocument") {
417    $self->{'current_section'} = $doc_obj->get_top_section();
418    } elsif ($element eq "PageGroup" || $element eq "Page") {
419    # create a new section as a child
420    $self->{'current_section'} = $doc_obj->insert_section($doc_obj->get_end_child($self->{'current_section'}));
421    $self->{'num_pages'}++;
422    # assign pagenum as  what??
423    my $pagenum = $_{'pagenum'}; #TODO!!
424    if (defined $pagenum) {
425        $doc_obj->set_utf8_metadata_element($self->{'current_section'}, 'PageNum', $pagenum);
426    }
427    my ($imgfile) = $_{'imgfile'};
428    if (defined $imgfile) {
429        # *****
430        # What about support for rotate image (e.g. old ':r' notation)?
431        $self->process_image($self->{'xml_file_dir'}.$imgfile, $imgfile, $doc_obj, $self->{'current_section'});
432    }
433    my ($txtfile) = $_{'txtfile'};
434    if (defined($txtfile)&& $txtfile ne "") {
435        $self->process_text ($self->{'xml_file_dir'}.$txtfile, $txtfile, $doc_obj, $self->{'current_section'});
436    } else {
437        $self->add_dummy_text($doc_obj, $self->{'current_section'});
438    }
439    } elsif ($element eq "Metadata") {
440    $self->{'metadata_name'} = $_{'name'};
441    }
442}
443
444sub xml_end_tag {
445    my $self = shift(@_);
446    my ($expat, $element) = @_;
447   
448    my $doc_obj = $self->{'doc_obj'};
449    if ($element eq "Page" || $element eq "PageGroup") {
450    # if Title hasn't been assigned, set PageNum as Title
451    if (!defined $doc_obj->get_metadata_element ($self->{'current_section'}, "Title") && defined $doc_obj->get_metadata_element ($self->{'current_section'}, "PageNum" )) {
452        $doc_obj->add_utf8_metadata ($self->{'current_section'}, "Title", $doc_obj->get_metadata_element ($self->{'current_section'}, "PageNum" ));
453    }
454    # move the current section back to the parent
455    $self->{'current_section'} = $doc_obj->get_parent_section($self->{'current_section'});
456    } elsif ($element eq "Metadata") {
457   
458    $doc_obj->add_utf8_metadata ($self->{'current_section'}, $self->{'metadata_name'}, $self->{'metadata_value'});
459    $self->{'metadata_name'} = "";
460    $self->{'metadata_value'} = "";
461
462    }
463    # otherwise we ignore the end tag
464}
465
466
467sub xml_text {
468    my $self = shift(@_);
469    my ($expat) = @_;
470
471    if ($self->{'element'} eq "Metadata" && $self->{'metadata_name'}) {
472    $self->{'metadata_value'} .= $_;
473    }
474}
475
476sub xml_doctype {
477}
478
479sub open_document {
480    my $self = shift(@_);
481   
482    # create a new document
483    $self->{'doc_obj'} = new doc ($self->{'filename'}, "indexed_doc", $self->{'file_rename_method'});
484    # TODO is file filenmae_no_path??
485    $self->set_initial_doc_fields($self->{'doc_obj'}, $self->{'file'}, $self->{'processor'});
486
487    my ($dir, $file) = $self->{'filename'} =~ /^(.*?)([^\/\\]*)$/;
488    $self->{'xml_file_dir'} = $dir;
489    $self->{'num_pages'} = 0;
490
491}
492
493sub close_document {
494    my $self = shift(@_);
495    my $doc_obj = $self->{'doc_obj'};
496   
497    # add numpages metadata
498    $doc_obj->set_utf8_metadata_element ($doc_obj->get_top_section(), 'NumPages', $self->{'num_pages'});
499
500   
501}
502
503
504sub set_initial_doc_fields {
505    my $self = shift(@_);
506    my ($doc_obj, $filename_no_path, $processor) = @_;
507
508    my $topsection = $doc_obj->get_top_section();
509
510    if ($self->{'documenttype'} eq 'paged') {
511    # set the gsdlthistype metadata to Paged - this ensures this document will
512    # be treated as a Paged doc, even if Titles are not numeric
513    $doc_obj->set_utf8_metadata_element ($topsection, "gsdlthistype", "Paged");
514    } else {
515    $doc_obj->set_utf8_metadata_element ($topsection, "gsdlthistype", "Hierarchy");
516    }
517
518    $self->set_Source_metadata($doc_obj, $filename_no_path);
519   
520    # if we want a header page, we need to add some text into the top section, otherwise this section will become invisible
521    if ($self->{'headerpage'}) {
522    $self->add_dummy_text($doc_obj, $topsection);
523    }
524
525
526}
527
528
529sub process_item {
530    my $self = shift (@_);
531    my ($filename_full_path, $dir, $filename_no_path, $processor) = @_;
532
533    my $doc_obj = new doc ($filename_full_path, "indexed_doc", $self->{'file_rename_method'});
534    $self->set_initial_doc_fields($doc_obj, $filename_no_path, $processor);
535    my $topsection = $doc_obj->get_top_section();
536    open (ITEMFILE, $filename_full_path) || die "couldn't open $filename_full_path\n";
537    my $line = "";
538    my $num = 0;
539    while (defined ($line = <ITEMFILE>)) {
540    next unless $line =~ /\w/;
541    chomp $line;
542    next if $line =~ /^#/; # ignore comment lines
543    if ($line =~ /^<([^>]*)>\s*(.*?)\s*$/) {
544        $doc_obj->set_utf8_metadata_element ($topsection, $1, $2);
545        #$meta->{$1} = $2;
546    } else {
547        $num++;
548        # line should be like page:imagefilename:textfilename:r - the r is optional -> means rotate the image 180 deg
549        $line =~ s/^\s+//; #remove space at the front
550        $line =~ s/\s+$//; #remove space at the end
551        my ($pagenum, $imgname, $txtname, $rotate) = split /:/, $line;
552       
553        # create a new section for each image file
554        my $cursection = $doc_obj->insert_section($doc_obj->get_end_child($topsection));
555        # the page number becomes the Title
556        $doc_obj->set_utf8_metadata_element($cursection, 'Title', $pagenum);
557     
558        # process the image for this page if there is one
559        if (defined $imgname && $imgname ne "") {
560        my $result1 = $self->process_image($dir.$imgname, $imgname, $doc_obj, $cursection, $rotate);
561       
562        if (!defined $result1)
563        {
564            print "PagedImagePlugin: couldn't process image \"$dir.$imgname\" for item \"$filename_full_path\"\n";
565        }
566        }
567        # process the text file if one is there
568        if (defined $txtname && $txtname ne "") {
569        my $result2 = $self->process_text ($dir.$txtname, $txtname, $doc_obj, $cursection);
570               
571        if (!defined $result2) {
572            print "PagedImagePlugin: couldn't process text file \"$dir.$txtname\" for item \"$filename_full_path\"\n";
573            $self->add_dummy_text($doc_obj, $cursection);
574        }
575        } else {
576        # otherwise add in some dummy text
577        $self->add_dummy_text($doc_obj, $cursection);
578        }
579    }
580    }
581   
582    close ITEMFILE;
583
584    # add numpages metadata
585    $doc_obj->set_utf8_metadata_element ($topsection, 'NumPages', "$num");
586    return $doc_obj;
587}
588
589sub process_text {
590    my $self = shift (@_);
591    my ($filename_full_path, $file, $doc_obj, $cursection) = @_;
592   
593    # check that the text file exists!!
594    if (!-f $filename_full_path) {
595    print "PagedImagePlugin: ERROR: File $filename_full_path does not exist, skipping\n";
596    return 0;
597    }
598
599    # Do encoding stuff
600    my ($language, $encoding) = $self->textcat_get_language_encoding ($filename_full_path);
601
602    my $text="";
603    &ReadTextFile::read_file($self, $filename_full_path, $encoding, $language, \$text);
604    if (!length ($text)) {
605    # It's a bit unusual but not out of the question to have no text, so just give a warning
606        print "PagedImagePlugin: WARNING: $filename_full_path contains no text\n";
607    }
608
609    # we need to escape the escape character, or else mg will convert into
610    # eg literal newlines, instead of leaving the text as '\n'
611    $text =~ s/\\/\\\\/g; # macro language
612    $text =~ s/_/\\_/g; # macro language
613
614
615    if ($text =~ m/<html.*?>\s*<head.*?>.*<\/head>\s*<body.*?>(.*)<\/body>\s*<\/html>\s*$/is) {
616    # looks like HTML input
617    # no need to escape < and > or put in <pre> tags
618
619    $text = $1;
620
621    # insert preformat tags and add text to document object
622    $doc_obj->add_utf8_text($cursection, "$text");
623    }
624    else {
625    $text =~ s/</&lt;/g;
626    $text =~ s/>/&gt;/g;
627
628    # insert preformat tags and add text to document object
629    $doc_obj->add_utf8_text($cursection, "<pre>\n$text\n</pre>");
630    }
631
632   
633    return 1;
634}
635
636
637sub clean_up_after_doc_obj_processing {
638    my $self = shift(@_);
639   
640    $self->ImageConverter::clean_up_temporary_files();
641}
642
6431;
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