ReCAPTCHA image

Hello Dear,I have a question: I would like only random show image (picture with numbers) (recaptcha_image). I don't want show charactersHow can i do? I read google articles but i don't understand. Is there an easy way?Thanx, -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.