htk - lattice画图工具（plot lattice）

对于生成的lattice文件，需要根据节点和边手动画出来lattice网络结构，非常不方便，找到一种方法可以把lattice转化为pdf的网络图形式。
一、安装工具
1.基于perl的cpan安装工具Graph-ReadWrite

sudo perl -MCPAN -e shellinstall Graphinstall XML::Parserinstall XML::Writerinstall IO::Fileinstall Graph::ReadWrite

2.安装dot
yum install graphviz-devel*
二、转化脚本
1.lattice -> dot
perl脚本如下

use Graph;use Graph::Reader::HTK;use Graph::Writer::Dot;my ($graph, $reader, $writer);my ($testfile);my $FILE;my $ingraph;$testfile = $ARGV[0];$genfile  = $ARGV[1];$reader = Graph::Reader::HTK->new();$writer = Graph::Writer::Dot->new();$ingraph = $reader->read_graph($testfile);$writer->write_graph($ingraph, $genfile);

2.dot->pdf
shell命令如下：

dot -Tpdf $dot_file > $pdf_file

3.转化以后的结果