__PACKAGE__->config->{captcha} = {
    session_name => 'captcha_string',
    new => {
      width => 80,
      height => 30,
      lines => 1,
      gd_font => 'giant',
    },
    create => [qw/normal rect/],
    particle => [100],
    out => {force => 'jpeg'}
  };