/**
*
* @return \Zend_Captcha_Image
*/
private function getImageCaptcha()
{
self::initSessionConfig();
$appPath = APP_PATH;
$captcha = new \Zend_Captcha_Image();
$captcha->setSession($this->getSession());
$captcha->setKeepSession(true);
$captcha->setFont($appPath . '/data/fonts/consola.ttf');
$captcha->setImgDir(dirname($appPath) . '/public/_captcha');
$captcha->setImgUrl('/_captcha');
$captcha->setExpiration(600);
$captcha->setWordlen(5);
$captcha->setUseNumbers(false);
return $captcha;
}