diff options
Diffstat (limited to 'training/make-lexcrf-grammar.pl')
| -rwxr-xr-x | training/make-lexcrf-grammar.pl | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/training/make-lexcrf-grammar.pl b/training/make-lexcrf-grammar.pl new file mode 100755 index 00000000..0e290492 --- /dev/null +++ b/training/make-lexcrf-grammar.pl @@ -0,0 +1,236 @@ +#!/usr/bin/perl -w +use utf8; +use strict; +my ($effile, $model1) = @ARGV; +die "Usage: $0 corpus.fr-en corpus.model1\n" unless $effile && -f $effile && $model1 && -f $model1; + +open EF, "<$effile" or die; +open M1, "<$model1" or die; +binmode(EF,":utf8"); +binmode(M1,":utf8"); +binmode(STDOUT,":utf8"); +my %model1; +while(<M1>) { + chomp; + my ($f, $e, $lp) = split /\s+/; + $model1{$f}->{$e} = $lp; +} + +my $ADD_MODEL1 = 0; # found that model1 hurts performance +my $IS_FRENCH_F = 0; # indicates that the f language is french +my $IS_ARABIC_F = 1; # indicates that the f language is arabic +my $ADD_PREFIX_ID = 0; +my $ADD_LEN = 1; +my $ADD_LD = 0; +my $ADD_DICE = 1; +my $ADD_111 = 1; +my $ADD_ID = 1; +my $ADD_PUNC = 1; +my $ADD_NUM_MM = 1; +my $ADD_NULL = 1; +my $BEAM_RATIO = 50; + +my %fdict; +my %fcounts; +my %ecounts; + +while(<EF>) { + chomp; + my ($f, $e) = split /\s*\|\|\|\s*/; + my @es = split /\s+/, $e; + my @fs = split /\s+/, $f; + for my $ew (@es){ $ecounts{$ew}++; } + push @fs, '<eps>' if $ADD_NULL; + for my $fw (@fs){ $fcounts{$fw}++; } + for my $fw (@fs){ + for my $ew (@es){ + $fdict{$fw}->{$ew}++; + } + } +} + +print STDERR "Dice 0\n" if $ADD_DICE; +print STDERR "OneOneOne 0\nId_OneOneOne 0\n" if $ADD_111; +print STDERR "Identical 0\n" if $ADD_ID; +print STDERR "PuncMiss 0\n" if $ADD_PUNC; +print STDERR "IsNull 0\n" if $ADD_NULL; +print STDERR "Model1 0\n" if $ADD_MODEL1; +print STDERR "DLen 0\n" if $ADD_LEN; +print STDERR "NumMM 0\n" if $ADD_NUM_MM; +print STDERR "Level 0\n" if $ADD_LD; +print STDERR "PfxIdentical 0\n" if ($ADD_PREFIX_ID); +my $fc = 1000000; +for my $f (sort keys %fdict) { + my $re = $fdict{$f}; + my $max; + for my $e (sort {$re->{$b} <=> $re->{$a}} keys %$re) { + my $efcount = $re->{$e}; + unless (defined $max) { $max = $efcount; } + my $m1 = $model1{$f}->{$e}; + unless (defined $m1) { next; } + $fc++; + my $dice = 2 * $efcount / ($ecounts{$e} + $fcounts{$f}); + my $feats = "F$fc=1"; + my $oe = $e; + my $len_e = length($oe); + my $of = $f; # normalized form + if ($IS_FRENCH_F) { + # see http://en.wikipedia.org/wiki/Use_of_the_circumflex_in_French + $of =~ s/â/as/g; + $of =~ s/ê/es/g; + $of =~ s/î/is/g; + $of =~ s/ô/os/g; + $of =~ s/û/us/g; + } elsif ($IS_ARABIC_F) { + if (length($of) > 1 && !($of =~ /\d/)) { + $of =~ s/\$/sh/g; + } + } + my $len_f = length($of); + $feats .= " Model1=$m1" if ($ADD_MODEL1); + $feats .= " Dice=$dice" if $ADD_DICE; + my $is_null = undef; + if ($ADD_NULL && $f eq '<eps>') { + $feats .= " IsNull=1"; + $is_null = 1; + } + if ($ADD_LEN) { + if (!$is_null) { + my $dlen = abs($len_e - $len_f); + $feats .= " DLen=$dlen"; + } + } + my $f_num = ($of =~ /^-?\d[0-9\.\,]+%?$/); # this matches *two digit* and more numbers + my $e_num = ($oe =~ /^-?\d[0-9\.\,]+%?$/); + my $both_non_numeric = (!$e_num && !$f_num); + if ($ADD_NUM_MM && (($f_num && !$e_num) || ($e_num && !$f_num))) { + $feats .= " NumMM=1"; + } + if ($ADD_PREFIX_ID) { + if ($len_e > 3 && $len_f > 3 && $both_non_numeric) { + my $pe = substr $oe, 0, 3; + my $pf = substr $of, 0, 3; + if ($pe eq $pf) { $feats .= " PfxIdentical=1"; } + } + } + if ($ADD_LD) { + my $ld = 0; + if ($is_null) { $ld = length($e); } else { + $ld = levenshtein($e, $f); + } + $feats .= " Leven=$ld"; + } + my $ident = ($e eq $f); + if ($ident && $ADD_ID) { $feats .= " Identical=1"; } + if ($ADD_111 && ($efcount == 1 && $ecounts{$e} == 1 && $fcounts{$f} == 1)) { + if ($ident && $ADD_ID) { + $feats .= " Id_OneOneOne=1"; + } + $feats .= " OneOneOne=1"; + } + if ($ADD_PUNC) { + if (($f =~ /^[0-9!\$%,\-\/"':;=+?.()«»]+$/ && $e =~ /[a-z]+/) || + ($e =~ /^[0-9!\$%,\-\/"':;=+?.()«»]+$/ && $f =~ /[a-z]+/)) { + $feats .= " PuncMiss=1"; + } + } + my $r = (0.5 - rand)/5; + print STDERR "F$fc $r\n"; + print "$f ||| $e ||| $feats\n"; + } +} + +sub levenshtein +{ + # $s1 and $s2 are the two strings + # $len1 and $len2 are their respective lengths + # + my ($s1, $s2) = @_; + my ($len1, $len2) = (length $s1, length $s2); + + # If one of the strings is empty, the distance is the length + # of the other string + # + return $len2 if ($len1 == 0); + return $len1 if ($len2 == 0); + + my %mat; + + # Init the distance matrix + # + # The first row to 0..$len1 + # The first column to 0..$len2 + # The rest to 0 + # + # The first row and column are initialized so to denote distance + # from the empty string + # + for (my $i = 0; $i <= $len1; ++$i) + { + for (my $j = 0; $j <= $len2; ++$j) + { + $mat{$i}{$j} = 0; + $mat{0}{$j} = $j; + } + + $mat{$i}{0} = $i; + } + + # Some char-by-char processing is ahead, so prepare + # array of chars from the strings + # + my @ar1 = split(//, $s1); + my @ar2 = split(//, $s2); + + for (my $i = 1; $i <= $len1; ++$i) + { + for (my $j = 1; $j <= $len2; ++$j) + { + # Set the cost to 1 iff the ith char of $s1 + # equals the jth of $s2 + # + # Denotes a substitution cost. When the char are equal + # there is no need to substitute, so the cost is 0 + # + my $cost = ($ar1[$i-1] eq $ar2[$j-1]) ? 0 : 1; + + # Cell $mat{$i}{$j} equals the minimum of: + # + # - The cell immediately above plus 1 + # - The cell immediately to the left plus 1 + # - The cell diagonally above and to the left plus the cost + # + # We can either insert a new char, delete a char or + # substitute an existing char (with an associated cost) + # + $mat{$i}{$j} = min([$mat{$i-1}{$j} + 1, + $mat{$i}{$j-1} + 1, + $mat{$i-1}{$j-1} + $cost]); + } + } + + # Finally, the Levenshtein distance equals the rightmost bottom cell + # of the matrix + # + # Note that $mat{$x}{$y} denotes the distance between the substrings + # 1..$x and 1..$y + # + return $mat{$len1}{$len2}; +} + + +# minimal element of a list +# +sub min +{ + my @list = @{$_[0]}; + my $min = $list[0]; + + foreach my $i (@list) + { + $min = $i if ($i < $min); + } + + return $min; +} + |