Usage: once you have the labeled sequence, this tool can
help you to extract the signs automatically. you need to run this script in
Matlab. the usage is:
extract dir1 dir2
where dir1 is the "DIR" name that contains all of your
sentences, please refer to "framelabeler" to see what "DIR"
means. while dir2 is the directory where you want to put all the signs. it
must be within the same directory as the program.