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|
#!/usr/bin/env perl
#
# This file is part of moses. Its use is licensed under the GNU Lesser General
# Public License version 2.1 or, at your option, any later version.
use warnings;
use strict;
use utf8;
use Getopt::Long "GetOptions";
use FindBin qw($RealBin);
use IO::Handle;
use File::Basename;
binmode(STDIN, ':utf8');
binmode(STDOUT, ':utf8');
binmode(STDERR, ':utf8');
my $OUT_DIR = "/tmp/Transliteration-Phrase-Table.$$";
my ($MOSES_SRC_DIR,$TRANSLIT_MODEL,$OOV_FILE,$EXTERNAL_BIN_DIR, $INPUT_EXTENSION, $OUTPUT_EXTENSION);
die("ERROR: wrong syntax when invoking train-transliteration-PT.pl")
unless &GetOptions('moses-src-dir=s' => \$MOSES_SRC_DIR,
'external-bin-dir=s' => \$EXTERNAL_BIN_DIR,
'transliteration-model-dir=s' => \$TRANSLIT_MODEL,
'input-extension=s' => \$INPUT_EXTENSION,
'output-extension=s' => \$OUTPUT_EXTENSION,
'out-dir=s' => \$OUT_DIR,
'oov-file=s' => \$OOV_FILE);
# check if the files are in place
die("ERROR: you need to define --moses-src-dir --external-bin-dir, --transliteration-model-dir, --oov-file, --input-extension, --output-extension")
unless (defined($MOSES_SRC_DIR) &&
defined($TRANSLIT_MODEL) &&
defined($OOV_FILE) &&
defined($INPUT_EXTENSION)&&
defined($OUTPUT_EXTENSION));
die("ERROR: could not find Transliteration Model '$TRANSLIT_MODEL'")
unless -e $TRANSLIT_MODEL;
die("ERROR: could not find OOV file '$OOV_FILE'")
unless -e $OOV_FILE;
my $UNK_FILE_NAME = basename($OOV_FILE);
`mkdir -p $OUT_DIR/$UNK_FILE_NAME/training`;
`cp $OOV_FILE $OUT_DIR/$UNK_FILE_NAME/$UNK_FILE_NAME`;
my $translitFile = "$OUT_DIR/" . $UNK_FILE_NAME . "/" . $UNK_FILE_NAME . ".translit";
print STDERR "Preparing for Transliteration\n";
prepare_for_transliteration ($OOV_FILE , $translitFile);
print STDERR "Run Transliteration\n";
run_transliteration ($MOSES_SRC_DIR , $EXTERNAL_BIN_DIR , $TRANSLIT_MODEL , $translitFile);
print STDERR "Form Transliteration Corpus\n";
form_corpus ($translitFile , $translitFile.".op.nBest" , $OUT_DIR);
################### Read the UNK word file and prepare for Transliteration ###############################
sub prepare_for_transliteration
{
my @list = @_;
my $testFile = $list[0];
my $translitFile = $list[1];
my %UNK;
my @words;
my $src;
open MYFILE, "<:encoding(UTF-8)", $testFile or die "Can't open $testFile: $!\n";
while (<MYFILE>)
{
chomp;
#print "$_\n";
@words = split(/ /, "$_");
foreach (@words)
{
$UNK{"$_"} = 1;
}
}
close (MYFILE);
open MYFILE, ">:encoding(UTF-8)", $translitFile or die "Can't open $translitFile: $!\n";
foreach my $key ( keys %UNK )
{
$src=join(' ', split('',$key));
print MYFILE "$src\n";
}
close (MYFILE);
}
################### Run Transliteration Module to Obtain Transliterations ###############################
sub run_transliteration
{
my @list = @_;
my $MOSES_SRC = $list[0];
my $EXTERNAL_BIN_DIR = $list[1];
my $TRANSLIT_MODEL = $list[2];
my $eval_file = $list[3];
`touch $eval_file.moses.table.ini`;
print STDERR "Filter Table\n";
`$MOSES_SRC/scripts/training/train-model.perl \\
-mgiza -mgiza-cpus 10 -dont-zip -first-step 9 \\
-external-bin-dir $EXTERNAL_BIN_DIR -f $INPUT_EXTENSION \\
-e $OUTPUT_EXTENSION -alignment grow-diag-final-and -parts 5 \\
-reordering msd-bidirectional-fe -score-options '--KneserNey' \\
-phrase-translation-table $TRANSLIT_MODEL/model/phrase-table \\
-reordering-table $TRANSLIT_MODEL/model/reordering-table \\
-config $eval_file.moses.table.ini \\
-lm 0:3:$eval_file.moses.table.ini:8`;
`$MOSES_SRC/scripts/training/filter-model-given-input.pl \\
$eval_file.filtered $eval_file.moses.table.ini $eval_file \\
-Binarizer "$MOSES_SRC/bin/CreateOnDiskPt 1 1 4 100 2"`;
`rm $eval_file.moses.table.ini`;
print STDERR "Apply Filter\n";
`$MOSES_SRC/scripts/ems/support/substitute-filtered-tables-and-weights.perl \\
$eval_file.filtered/moses.ini $TRANSLIT_MODEL/model/moses.ini \\
$TRANSLIT_MODEL/tuning/moses.tuned.ini $eval_file.filtered.ini`;
`$MOSES_SRC/bin/moses \\
-search-algorithm 1 -cube-pruning-pop-limit 5000 -s 5000 \\
-threads 16 -drop-unknown -distortion-limit 0 \\
-n-best-list $eval_file.op.nBest 50 \\
-f $eval_file.filtered.ini \\
< $eval_file \\
> $eval_file.op`;
}
################### Read the output of Transliteration Model and Form Corpus ###############################
sub form_corpus
{
my @list = @_;
my $inp_file = $list[0];
my $testFile = $list[1];
my $EVAL_DIR = $list[2];
my %vocab;
my @words;
my $thisStr;
my $UNK_FILE_NAME = basename($OOV_FILE);
my $target = $EVAL_DIR . "/$UNK_FILE_NAME/training/corpus.$OUTPUT_EXTENSION";
my $outFile = "$EVAL_DIR/out.txt";
open MYFILE, "<:encoding(UTF-8)", $testFile or die "Can't open $testFile: $!\n";
open OUTFILE, ">:encoding(UTF-8)", $outFile or die "Can't open $outFile: $!\n";
while (<MYFILE>)
{
chomp;
#print "$_\n";
@words = split(/ /, "$_");
my $i = 2;
my $prob;
$thisStr = "";
while ($words[$i] ne "|||")
{
$thisStr = $thisStr . $words[$i];
$i++;
}
$i++;
while ($words[$i] ne "|||")
{
$i++;
}
$i++;
$prob = $words[$i];
print OUTFILE "$thisStr\t$prob\n";
}
close (MYFILE);
close (OUTFILE);
}
|
