1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
#!/usr/bin/env perl
use warnings;
use strict;
use utf8;
use File::Basename;
use Getopt::Long "GetOptions";
use FindBin qw($RealBin);
use Scalar::Util qw(looks_like_number);
use IO::Handle;
binmode(STDIN, ':utf8');
binmode(STDOUT, ':utf8');
binmode(STDERR, ':utf8');
my $___FACTOR_DELIMITER = "|";
my $OUT_FILE = "/tmp/transliteration-phrase-table.$$";
my ($MOSES_SRC_DIR,$TRANSLIT_MODEL,$OOV_FILE, $OOV_FILE_NAME, $EXTERNAL_BIN_DIR, $LM_FILE, $INPUT_EXTENSION, $OUTPUT_EXTENSION);
die("ERROR: wrong syntax when invoking in-decoding-transliteration.perl")
unless &GetOptions('moses-src-dir=s' => \$MOSES_SRC_DIR,
'external-bin-dir=s' => \$EXTERNAL_BIN_DIR,
'transliteration-model-dir=s' => \$TRANSLIT_MODEL,
'input-extension=s' => \$INPUT_EXTENSION,
'output-extension=s' => \$OUTPUT_EXTENSION,
'transliteration-file=s' => \$OOV_FILE,
'out-file=s' => \$OUT_FILE);
# check if the files are in place
die("ERROR: you need to define --moses-src-dir --external-bin-dir, --transliteration-model-dir, --transliteration-file, --input-extension, and --output-extension")
unless (defined($MOSES_SRC_DIR) &&
defined($TRANSLIT_MODEL) &&
defined($OOV_FILE) &&
defined($INPUT_EXTENSION)&&
defined($OUTPUT_EXTENSION)&&
defined($EXTERNAL_BIN_DIR));
die("ERROR: could not find Transliteration Model '$TRANSLIT_MODEL'")
unless -e $TRANSLIT_MODEL;
die("ERROR: could not find Transliteration file $OOV_FILE'")
unless -e $OOV_FILE;
$OOV_FILE_NAME = basename ($OOV_FILE);
`mkdir $TRANSLIT_MODEL/evaluation`;
`cp $OOV_FILE $TRANSLIT_MODEL/evaluation/`;
my $translitFile = $TRANSLIT_MODEL . "/evaluation/" . $OOV_FILE_NAME;
print "Preparing for Transliteration\n";
prepare_for_transliteration ($OOV_FILE, $translitFile);
print "Run Transliteration\n";
run_transliteration ($MOSES_SRC_DIR , $EXTERNAL_BIN_DIR , $TRANSLIT_MODEL , $OOV_FILE_NAME);
print "Pick Best Transliteration\n";
form_corpus ($translitFile , $translitFile.".op.nBest" , $OUT_FILE);
################### 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;
my @tW;
open MYFILE, "<:encoding(UTF-8)", $testFile or die "Can't open $testFile: $!\n";
while (<MYFILE>)
{
chomp;
#print "$_\n";
@words = split(/ /, "$_");
foreach (@words)
{
@tW = split /\Q$___FACTOR_DELIMITER/;
if (defined $tW[0])
{
if (! ($tW[0] =~ /[0-9.,]/))
{
$UNK{$tW[0]} = 1;
}
else
{
print "Not transliterating $tW[0] \n";
}
}
}
}
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 $TRANSLIT_MODEL/evaluation/$eval_file.moses.table.ini`;
print "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 -score-options '--KneserNey' -phrase-translation-table $TRANSLIT_MODEL/model/phrase-table -config $TRANSLIT_MODEL/evaluation/$eval_file.moses.table.ini -lm 0:3:$TRANSLIT_MODEL/evaluation/$eval_file.moses.table.ini:8`;
`$MOSES_SRC/scripts/training/filter-model-given-input.pl $TRANSLIT_MODEL/evaluation/$eval_file.filtered $TRANSLIT_MODEL/evaluation/$eval_file.moses.table.ini $TRANSLIT_MODEL/evaluation/$eval_file -Binarizer "$MOSES_SRC/bin/CreateOnDiskPt 1 1 4 100 2"`;
`rm $TRANSLIT_MODEL/evaluation/$eval_file.moses.table.ini`;
print "Apply Filter\n";
`$MOSES_SRC/scripts/ems/support/substitute-filtered-tables-and-weights.perl $TRANSLIT_MODEL/evaluation/$eval_file.filtered/moses.ini $TRANSLIT_MODEL/model/moses.ini $TRANSLIT_MODEL/tuning/moses.tuned.ini $TRANSLIT_MODEL/evaluation/$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 $TRANSLIT_MODEL/evaluation/$eval_file.op.nBest 100 distinct -f $TRANSLIT_MODEL/evaluation/$eval_file.filtered.ini < $TRANSLIT_MODEL/evaluation/$eval_file > $TRANSLIT_MODEL/evaluation/$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 @words;
my $thisStr;
my $features;
my $prev = 0;
my $sNum;
my @UNK;
my %vocab;
my $antLog = exp(0.2);
my $phraseTable = $list[2];
open MYFILE, "<:encoding(UTF-8)", $inp_file or die "Can't open $inp_file: $!\n";
open PT, ">:encoding(UTF-8)", $phraseTable or die "Can't open $phraseTable: $!\n";
while (<MYFILE>)
{
chomp;
#print "$_\n";
@words = split(/ /, "$_");
$thisStr = "";
foreach (@words)
{
$thisStr = $thisStr . "$_";
}
push(@UNK, $thisStr);
$vocab{$thisStr} = 1;
}
close (MYFILE);
open MYFILE, "<:encoding(UTF-8)", $testFile or die "Can't open $testFile: $!\n";
my $inpCount = 0;
while (<MYFILE>)
{
chomp;
#print "$_\n";
@words = split(/ /, "$_");
$sNum = $words[0];
if ($prev != $sNum){
$inpCount++;
}
my $i = 2;
$thisStr = "";
$features = "";
while ($words[$i] ne "|||")
{
$thisStr = $thisStr . $words[$i];
$i++;
}
$i++;
while ($words[$i] ne "|||")
{
if ($words[$i] =~ /Penalty0/ || $words[$i] eq "Distortion0=" || $words[$i] eq "LM0=" ){
$i++;
}
elsif (looks_like_number($words[$i])){
$features = $features . " " . exp($words[$i]);
}
$i++;
}
$i++;
#$features = $features . " " . $words[$i];
if ($thisStr ne ""){
print PT "$UNK[$inpCount] ||| $thisStr ||| $features ||| 0-0 ||| 0 0 0\n";
}
$prev = $sNum;
}
close (MYFILE);
close (PT);
`gzip $phraseTable`;
}
|
